RpmExtreme Official GEN4 LS Swap Thread 2007-2011 JK
06-29-2016, 02:49 PM
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RpmExtreme Official GEN4 LS Swap Thread 2007-2011 JK
We know alot of people have questions when it comes to installing a LS engine in their JK. We are opening an official tech thread for anyone running a LS engine or planning on running an LS engine.
We know there are several kit options in the marketplace and we can only speak for our own in this thread, but we will try to be helpful no matter what kit you are using. With that being said most of the info posted here will be related to the RpmExtreme swap kits for 2007 - 2011 Jeep JKs and may not apply to other kits.
We know doing a LS Swap is a big investment and there are many many options to sort out before you pull the trigger.
We will try to lay out the most common options and concerns in the next few posts and will field questions after that.
Please keep the posting to technical questions and things of that nature.
Here are some common terms to make sure everyone is on the same page.
GEN3 refers to earlier 2002-2006 engines
GEN4 refers to 2007-2013 engines
6L80e and 6L90e refer to a 6 speed automatic transmission commonly used with the GEN4 swaps
4L60e, 4l65e and 4L80e refer to a 4 speed automatic commonly used with a GEN3 swap
DBW refers to drive by wire. This would be a system where you don't have a throttle cable. This is the preferred system for an LS JK swap
TAC Module refers to the DBW module used with GEN3 engines
APP refers to the accelerator pedal (gas pedal)
:
:
:
:
:
We know there are several kit options in the marketplace and we can only speak for our own in this thread, but we will try to be helpful no matter what kit you are using. With that being said most of the info posted here will be related to the RpmExtreme swap kits for 2007 - 2011 Jeep JKs and may not apply to other kits.
We know doing a LS Swap is a big investment and there are many many options to sort out before you pull the trigger.
We will try to lay out the most common options and concerns in the next few posts and will field questions after that.
Please keep the posting to technical questions and things of that nature.
Here are some common terms to make sure everyone is on the same page.
GEN3 refers to earlier 2002-2006 engines
GEN4 refers to 2007-2013 engines
6L80e and 6L90e refer to a 6 speed automatic transmission commonly used with the GEN4 swaps
4L60e, 4l65e and 4L80e refer to a 4 speed automatic commonly used with a GEN3 swap
DBW refers to drive by wire. This would be a system where you don't have a throttle cable. This is the preferred system for an LS JK swap
TAC Module refers to the DBW module used with GEN3 engines
APP refers to the accelerator pedal (gas pedal)
:
:
:
:
:
Last edited by rpmextreme; 06-30-2016 at 03:39 PM.
06-29-2016, 02:49 PM
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Gen4 conversions use a 07-13 GM LS based engine. All are DBW drive by wire. They can be had in either cast iron or aluminum blocks and sizes ranging from 5.3L - 6.2L 58X
LH6 5.3L vin code “M” is an aluminum block engine producing 315HP and 338lb ft of torque.
LY5 5.3L vin code “J” is a cast iron block engine producing 320HP and 340lb ft of torque.
LMG 5.3L vin code “O” is a flex fuel version of the LY5 making the same power.
LC9 5.3L vin code “3or 7: is an aluminum block engine producing 320HP and 335b ft or torque.
L92 6.2L vin code “ “ is an aluminum block engine with VVT (variable valve timing) producing 403HP and 417lb ft of torque.
L9H 6.2L vin code “ “ is a flex fuel version of the L92 making the same power
L94 6.2L vin code “ “ is the same as a L9H but with added AFM (active fuel management)
Applications:
• 2007-2013 Cadillac Escalade (L9H for MY 2009, L94 for MY 2010-2013)
• 2009 Chevrolet Tahoe
• 2007-2013 GMC Yukon Denali/Denali XL
• 2007-2013 GMC Sierra Denali
• 2008-2009 Hummer H2
• 2009-2013 Chevrolet Silverado 1500 (as RPO code L9H)
• 2009-2013 GMC Sierra 1500 (as RPO code L9H)
LS3 6.2L was introduced as the Corvette's new base engine for the 2008 model year. It produces 430 bhp at 5900 rpm and 424 lb·ft at 4600 rpm. Look for engines from a 2010 - 2014 camaro with a manual transmission
L99 6.2L is derived from the LS3 with reduced output but adds AFM (Active Fuel Management) and VVT (variable valve timing). Look for engines from a 2010- 2014 camaro with a Auto transmission.
LS3 Crate engines:
LS3 crate engines come semi complete from oil pan to the ignition system. It also includes the EFI intake manifold assembly with injectors and throttle body, exhaust manifolds, corvette water pump & balancer and 14-inch automatic-transmission flexplate. You will still need to source an accessory drive i.e.: alternator, power steering, AC and brackets. We typically try to use a 2010 camaro accessory drive with a truck style AC compressor. You will also need to change over to a Camaro or Truck balancer and water pump. A complete parts list can be provided and will be on our website to help guide you in choosing the correct parts.
430HP 6.2L
480HP 6.2L
525HP 6.2L
LH6 5.3L vin code “M” is an aluminum block engine producing 315HP and 338lb ft of torque.
LY5 5.3L vin code “J” is a cast iron block engine producing 320HP and 340lb ft of torque.
LMG 5.3L vin code “O” is a flex fuel version of the LY5 making the same power.
LC9 5.3L vin code “3or 7: is an aluminum block engine producing 320HP and 335b ft or torque.
L92 6.2L vin code “ “ is an aluminum block engine with VVT (variable valve timing) producing 403HP and 417lb ft of torque.
L9H 6.2L vin code “ “ is a flex fuel version of the L92 making the same power
L94 6.2L vin code “ “ is the same as a L9H but with added AFM (active fuel management)
Applications:
• 2007-2013 Cadillac Escalade (L9H for MY 2009, L94 for MY 2010-2013)
• 2009 Chevrolet Tahoe
• 2007-2013 GMC Yukon Denali/Denali XL
• 2007-2013 GMC Sierra Denali
• 2008-2009 Hummer H2
• 2009-2013 Chevrolet Silverado 1500 (as RPO code L9H)
• 2009-2013 GMC Sierra 1500 (as RPO code L9H)
LS3 6.2L was introduced as the Corvette's new base engine for the 2008 model year. It produces 430 bhp at 5900 rpm and 424 lb·ft at 4600 rpm. Look for engines from a 2010 - 2014 camaro with a manual transmission
L99 6.2L is derived from the LS3 with reduced output but adds AFM (Active Fuel Management) and VVT (variable valve timing). Look for engines from a 2010- 2014 camaro with a Auto transmission.
LS3 Crate engines:
LS3 crate engines come semi complete from oil pan to the ignition system. It also includes the EFI intake manifold assembly with injectors and throttle body, exhaust manifolds, corvette water pump & balancer and 14-inch automatic-transmission flexplate. You will still need to source an accessory drive i.e.: alternator, power steering, AC and brackets. We typically try to use a 2010 camaro accessory drive with a truck style AC compressor. You will also need to change over to a Camaro or Truck balancer and water pump. A complete parts list can be provided and will be on our website to help guide you in choosing the correct parts.
430HP 6.2L
480HP 6.2L
525HP 6.2L
06-29-2016, 02:50 PM
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With the Gen4 engine swaps we use a GM 6l80E 6 speed automatic transmission. A transfer case adapter allows us to use the stock Jeep JK 241J transfer case. The Rubicon transfer case will not work because no one that we know of makes a 32 spline input shaft for it.
The 6L80 features a generously deep first gear for an automatic, making for favorably powerful starts from a standing stop. It also features two overdrive gears. The gearing spread is a very capable 6.04, with ratios in each gear as follows: compared to your stock JK auto transmission you can see a 6L80e has a much better 1st and second gear along with 2 overdrives.
First: 4.02, JK 3.00
Second: 2.36, JK 1.67
Third: 1.53, JK 1.00
Fourth: 1.15, JK .75
Fifth: .085,
Sixth: 0.67,
Reverse: 3.06 JK 3.00
The 6L80 has a maximum RPM limit of 6500 RPM.
Maximum engine power: "555 bhp ( 414 kW )"
Maximum engine torque: "550 lb-ft ( 746 Nm )"
The 6L90 transmission is slightly longer and taller than a comparable configuration 6L80 due to it's beefier internals. GM states, ". It is a heavy-duty version of the 6L80 six-speed automatic, with a strengthened input gearset which has two additional pinion gears for six total, and a strengthened output gearset, that uses wider gears than the 6L80. The 6L90 flexibilty extends to the clutches where the 6L90 has one more clutch plate than the 6L80 in each clutch for heavy duty applications. "
The 6L90 case is about 1.4" (35mm) longer than the 6L80 case.
Our electronics and adapters will support a 6L80e or 6L90e but with a 6L90e you may need to modify the trans bracket to accommodate the extra length and driveshaft modifications are a must.
AWD/4WD Transmission-bellhousing to end of output shaft (bellhousing to end of case)
4L70: 26.875" (22.25")
6L80: 27.125" (23.3")
6L90: 28.625" (24.7")
4L80: 29" (26")
6L80 weight
Transmission weight:258mm converter: Wet: 94-96kg ( 207-211lb )
Transmission weight:300mm converter: Wet: 102-104kg ( 225-229lb )
6L90 weight
Transmission weight: w/ 300mm converter
Wet: 109kg ( 240lb ) estimated
4L60 weight
Wet: 74 - 88.5 kg (163.2 - 195.0 lb)
4L80 weight
Wet: 115 kg (254 lb)
The Engine Control Modules (ECM) that communicates with the 6L80/90 Transmission Control Module (TCM) is programmed to only recognize Gen IV LSx engines. Specifically the 58X crankshaft reluctor ring, the 4x cam shaft sprocket. The pre-2007 model year Gen III and Gen IV motors (LS2 Corvette notwithstanding) operate with a 24x crankshaft reluctor ring, a 1x camshaft sprocket are not compatible with this transmission.
Our kits offer fully functional TAP shift capabilities allowing you to fully control your shifts along with TOW HAUL mode utilizing your factory buttons. No adding a toggle switch or modifying your shifter.
Your PRNDL display will indicate the correct chosen gear 1,2,3,4,5,6 right on your factory dash. This makes it very easy to tell what gear you have selected.
This transmission is truly the unsung hero of the LS swap. Silky smooth shifts and very generous overdrives allow for less gearing and better fuel mileage. No more hunting for gears every time you come to a hill.
The 6L80 features a generously deep first gear for an automatic, making for favorably powerful starts from a standing stop. It also features two overdrive gears. The gearing spread is a very capable 6.04, with ratios in each gear as follows: compared to your stock JK auto transmission you can see a 6L80e has a much better 1st and second gear along with 2 overdrives.
First: 4.02, JK 3.00
Second: 2.36, JK 1.67
Third: 1.53, JK 1.00
Fourth: 1.15, JK .75
Fifth: .085,
Sixth: 0.67,
Reverse: 3.06 JK 3.00
The 6L80 has a maximum RPM limit of 6500 RPM.
Maximum engine power: "555 bhp ( 414 kW )"
Maximum engine torque: "550 lb-ft ( 746 Nm )"
The 6L90 transmission is slightly longer and taller than a comparable configuration 6L80 due to it's beefier internals. GM states, ". It is a heavy-duty version of the 6L80 six-speed automatic, with a strengthened input gearset which has two additional pinion gears for six total, and a strengthened output gearset, that uses wider gears than the 6L80. The 6L90 flexibilty extends to the clutches where the 6L90 has one more clutch plate than the 6L80 in each clutch for heavy duty applications. "
The 6L90 case is about 1.4" (35mm) longer than the 6L80 case.
Our electronics and adapters will support a 6L80e or 6L90e but with a 6L90e you may need to modify the trans bracket to accommodate the extra length and driveshaft modifications are a must.
AWD/4WD Transmission-bellhousing to end of output shaft (bellhousing to end of case)
4L70: 26.875" (22.25")
6L80: 27.125" (23.3")
6L90: 28.625" (24.7")
4L80: 29" (26")
6L80 weight
Transmission weight:258mm converter: Wet: 94-96kg ( 207-211lb )
Transmission weight:300mm converter: Wet: 102-104kg ( 225-229lb )
6L90 weight
Transmission weight: w/ 300mm converter
Wet: 109kg ( 240lb ) estimated
4L60 weight
Wet: 74 - 88.5 kg (163.2 - 195.0 lb)
4L80 weight
Wet: 115 kg (254 lb)
The Engine Control Modules (ECM) that communicates with the 6L80/90 Transmission Control Module (TCM) is programmed to only recognize Gen IV LSx engines. Specifically the 58X crankshaft reluctor ring, the 4x cam shaft sprocket. The pre-2007 model year Gen III and Gen IV motors (LS2 Corvette notwithstanding) operate with a 24x crankshaft reluctor ring, a 1x camshaft sprocket are not compatible with this transmission.
Our kits offer fully functional TAP shift capabilities allowing you to fully control your shifts along with TOW HAUL mode utilizing your factory buttons. No adding a toggle switch or modifying your shifter.
Your PRNDL display will indicate the correct chosen gear 1,2,3,4,5,6 right on your factory dash. This makes it very easy to tell what gear you have selected.
This transmission is truly the unsung hero of the LS swap. Silky smooth shifts and very generous overdrives allow for less gearing and better fuel mileage. No more hunting for gears every time you come to a hill.
06-29-2016, 02:50 PM
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LS Engine Conversion Kit for 2007-2013 GEN IV GM Engines : Click here to see the kit JK-LS-GEN4-Engine-Conversion-Kit-07-11
This engine conversion kit is for 2007-2011 Jeep Wrangler JK when installing a GM LS GEN IV series engine 2007-2013 5.3 6.0 6.2 and 6L80E 6 Speed automatic transmission. The overwhelming amount of GM LS series V8 engines at great prices it makes this swap a home run.
We know it can seem daunting to try and wrap your head around so many options, we try and make it a no brainer. To get your Jeep up and running, our harness comes complete and is 100% brand new. No need to send in your old harness or modify anything and with only a few wires to splice into the existing Jeep its extremely easy to be up and running. We also incorporate a state of the art CanBus module to take care of all the data, that means you get a factory style fully integrated GM engine running in your Jeep JK with all the factory bells and whistles.
Our harness integrates the Jeep and GM side harnesses into one single harness. The engine harness routes directly to the ECU with a factory plug at the factory firewall connector. The bulk of the harness routes behind the engine and under the fuel rails which is visually appealing and allows for factory engine covers to be used. Our under dash harness incorporates the GM accelerator pedal, ALDL, GM fuses-Relays and EZ CanBus module all while plugging directly into the main harness.
The final result is a harness that features improved aesthetics and versatility, easier to install and offers premium quality and durability.
Technology:
There is a big difference in our conversion compared to others is technology. The Jeep JK is a full CanBus vehicle, what that means is everything is run by a computer speaking it's own language to all the other modules on the CanBus. GM also uses a CanBus on their GEN IV engines and vehicles, however, the GM and Jeep system don't speak the same language. What our EZ CanBus system does is take the GM CanBus and Jeep CanBus and run them through our EZCanBus module, it will then translate the language between the 2 systems and allow us to send messages between each one. We are able to take the GM tachometer signal and send it to the Jeep gauges without using an add on reluctor ring and extra wires, this saves you a lot of time on the install and this is much more reliable. We are also using the GM coolant temp signal and sending it to the Jeep gauge, again saving you time and money by not having to install an extra coolant temp sensor in the engine. Some other cool things we are able to do is have a 100% functioning PRDNL display on the dash with 1-6 gears indicated during TAP shifts. We are also able to use the factory Jeep cruise control switch to control not only the cruise control but also the GM TAP shifting with the added benefit of not having to modify your shifter or instrument cluster. The cruise light and check engine light will function as normal thanks to the EZ CanBus module. We are also able to incorporate is GM TOW-HAUL mode, by pressing you OD off button it will put the system into TOW-HAUL mode. We have many other features built into the EZ CanBus system and it is fully upgradable as we add new items.
Current features:
* 100% New harness
* EZ CanBus system
* PRNDL display with 1-6 gears in manual mode indicated on the dash
* GM TAP shifting using your factory Jeep cruise switch
* Fully functional cruise control using your factory Jeep cruise switch
* GM TOW_HAUL mode using your factory OD off button
* Factory AC control with evaporator temp monitoring
* Factory Jeep remote start functional
* Full GM Emissions compatible
* GM VVT and AFM-DOD compatible
What is in the basic kit:
* LS conversion harness
* EZ CanBus module
* Weld in motor mount plates
* Transmission mounting bracket
* Transfer case adapter 6L80E to Jeep 241J (non Rubicon)
* Transmission mount
* Transmission shifter cable bracket
* Transfer case shifter cable bracket
* Accelerator pedal bracket
* Plug n play fuel line adapter
* Jeep computer reprogramming
GM computer reprogramming
TIPM Reprograming
The basic kit comes with everything you need to get the engine into the Jeep, wired up, and running. This kit is for the guys that have experience with engine swaps and want to build their own exhaust, air intake, AC hoses, and radiator as well as all the miscellaneous parts needed.
If you're looking for a little more complete kit we offer some add on items to the base kit.
Optional or add on items:
* High flow aluminum radiator: Inlets and outlets are made to fit a LS engine and give extra room for the intake tube. This radiator also will accept the factory JK fan and condenser as a direct bolt in.
* AC hoses: Pre-made AC hoses made to fit either GM accessory or Jeep accessory drives.
* Exhaust manifolds: The same manifolds we use in house and guaranteed to fit.
* Driveshafts: We can supply you with custom driveshaft to fit with the LS conversion.
* Air intake kit: A custom made composite air intake using a K&N filter
* Jeep accessory brackets: A set of custom brackets that will allow you to reuse your 3.8 Jeep accessories.
* GM ECU Computer. We can supply a brand new E38 computer programmed to your application.
* Primary exhaust kit (engine to muffler). we can supply you with the same exact components we use to build out forward exhaust sections in the shop. It will have 2 high flow catalytic converters, o2 sensor bungs, mandrel bent pipe sections, Y style collector and stainless steel band clamps. Cutting and welding required.
* More items will be added as we build them.
This engine conversion kit is for 2007-2011 Jeep Wrangler JK when installing a GM LS GEN IV series engine 2007-2013 5.3 6.0 6.2 and 6L80E 6 Speed automatic transmission. The overwhelming amount of GM LS series V8 engines at great prices it makes this swap a home run.
We know it can seem daunting to try and wrap your head around so many options, we try and make it a no brainer. To get your Jeep up and running, our harness comes complete and is 100% brand new. No need to send in your old harness or modify anything and with only a few wires to splice into the existing Jeep its extremely easy to be up and running. We also incorporate a state of the art CanBus module to take care of all the data, that means you get a factory style fully integrated GM engine running in your Jeep JK with all the factory bells and whistles.
Our harness integrates the Jeep and GM side harnesses into one single harness. The engine harness routes directly to the ECU with a factory plug at the factory firewall connector. The bulk of the harness routes behind the engine and under the fuel rails which is visually appealing and allows for factory engine covers to be used. Our under dash harness incorporates the GM accelerator pedal, ALDL, GM fuses-Relays and EZ CanBus module all while plugging directly into the main harness.
The final result is a harness that features improved aesthetics and versatility, easier to install and offers premium quality and durability.
Technology:
There is a big difference in our conversion compared to others is technology. The Jeep JK is a full CanBus vehicle, what that means is everything is run by a computer speaking it's own language to all the other modules on the CanBus. GM also uses a CanBus on their GEN IV engines and vehicles, however, the GM and Jeep system don't speak the same language. What our EZ CanBus system does is take the GM CanBus and Jeep CanBus and run them through our EZCanBus module, it will then translate the language between the 2 systems and allow us to send messages between each one. We are able to take the GM tachometer signal and send it to the Jeep gauges without using an add on reluctor ring and extra wires, this saves you a lot of time on the install and this is much more reliable. We are also using the GM coolant temp signal and sending it to the Jeep gauge, again saving you time and money by not having to install an extra coolant temp sensor in the engine. Some other cool things we are able to do is have a 100% functioning PRDNL display on the dash with 1-6 gears indicated during TAP shifts. We are also able to use the factory Jeep cruise control switch to control not only the cruise control but also the GM TAP shifting with the added benefit of not having to modify your shifter or instrument cluster. The cruise light and check engine light will function as normal thanks to the EZ CanBus module. We are also able to incorporate is GM TOW-HAUL mode, by pressing you OD off button it will put the system into TOW-HAUL mode. We have many other features built into the EZ CanBus system and it is fully upgradable as we add new items.
Current features:
* 100% New harness
* EZ CanBus system
* PRNDL display with 1-6 gears in manual mode indicated on the dash
* GM TAP shifting using your factory Jeep cruise switch
* Fully functional cruise control using your factory Jeep cruise switch
* GM TOW_HAUL mode using your factory OD off button
* Factory AC control with evaporator temp monitoring
* Factory Jeep remote start functional
* Full GM Emissions compatible
* GM VVT and AFM-DOD compatible
What is in the basic kit:
* LS conversion harness
* EZ CanBus module
* Weld in motor mount plates
* Transmission mounting bracket
* Transfer case adapter 6L80E to Jeep 241J (non Rubicon)
* Transmission mount
* Transmission shifter cable bracket
* Transfer case shifter cable bracket
* Accelerator pedal bracket
* Plug n play fuel line adapter
* Jeep computer reprogramming
GM computer reprogramming
TIPM Reprograming
The basic kit comes with everything you need to get the engine into the Jeep, wired up, and running. This kit is for the guys that have experience with engine swaps and want to build their own exhaust, air intake, AC hoses, and radiator as well as all the miscellaneous parts needed.
If you're looking for a little more complete kit we offer some add on items to the base kit.
Optional or add on items:
* High flow aluminum radiator: Inlets and outlets are made to fit a LS engine and give extra room for the intake tube. This radiator also will accept the factory JK fan and condenser as a direct bolt in.
* AC hoses: Pre-made AC hoses made to fit either GM accessory or Jeep accessory drives.
* Exhaust manifolds: The same manifolds we use in house and guaranteed to fit.
* Driveshafts: We can supply you with custom driveshaft to fit with the LS conversion.
* Air intake kit: A custom made composite air intake using a K&N filter
* Jeep accessory brackets: A set of custom brackets that will allow you to reuse your 3.8 Jeep accessories.
* GM ECU Computer. We can supply a brand new E38 computer programmed to your application.
* Primary exhaust kit (engine to muffler). we can supply you with the same exact components we use to build out forward exhaust sections in the shop. It will have 2 high flow catalytic converters, o2 sensor bungs, mandrel bent pipe sections, Y style collector and stainless steel band clamps. Cutting and welding required.
* More items will be added as we build them.
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06-29-2016, 05:05 PM
#10
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We have spent countless hours working with the Jeep and GM CAN bus and probably have more knowledge compiled than anyone else. There are some really cool things that we can do on a factory level and we will have cool new features in the future that may only be a software update away.