Re-gear Re-grets?
02-06-2013, 08:02 AM
#21
JK Super Freak
This is just a random question, hopefully not a thread hijacker.
If I wanted to go from stock 3.73 to a 4.88, what would the approximate cost be, and would I have to change out the axles themselves, or just the gears?
One thing I'm a fan of is really low crawl speed. In all my adventures I've wanted for a slower crawl. Is this a good way to slow it down in 4-low without swapping the transfer case?
If I wanted to go from stock 3.73 to a 4.88, what would the approximate cost be, and would I have to change out the axles themselves, or just the gears?
One thing I'm a fan of is really low crawl speed. In all my adventures I've wanted for a slower crawl. Is this a good way to slow it down in 4-low without swapping the transfer case?
02-06-2013, 08:07 AM
#22
JK Freak
I have an 09 rubi 4 door that i put 35" km2's and regeared for 5.13 and love the low end grunt and overall improved drivability, however the drop in gas milage was a point or two.
My only problem is that when on the texas highways any speed over 80 mph and i get a driveline vibration due to the increased speed the factory drive shaft is now turning. I have started using the vibration as the jeeps speed limiter! Lol
My only problem is that when on the texas highways any speed over 80 mph and i get a driveline vibration due to the increased speed the factory drive shaft is now turning. I have started using the vibration as the jeeps speed limiter! Lol
Last edited by Earth Siege; 02-06-2013 at 08:10 AM.
02-06-2013, 12:05 PM
#24
JK Enthusiast
02-06-2013, 12:06 PM
#25
JK Enthusiast
I have an 09 rubi 4 door that i put 35" km2's and regeared for 5.13 and love the low end grunt and overall improved drivability, however the drop in gas milage was a point or two.
My only problem is that when on the texas highways any speed over 80 mph and i get a driveline vibration due to the increased speed the factory drive shaft is now turning. I have started using the vibration as the jeeps speed limiter! Lol
My only problem is that when on the texas highways any speed over 80 mph and i get a driveline vibration due to the increased speed the factory drive shaft is now turning. I have started using the vibration as the jeeps speed limiter! Lol
02-06-2013, 12:10 PM
#26
JK Enthusiast
This is just a random question, hopefully not a thread hijacker.
If I wanted to go from stock 3.73 to a 4.88, what would the approximate cost be, and would I have to change out the axles themselves, or just the gears?
One thing I'm a fan of is really low crawl speed. In all my adventures I've wanted for a slower crawl. Is this a good way to slow it down in 4-low without swapping the transfer case?
If I wanted to go from stock 3.73 to a 4.88, what would the approximate cost be, and would I have to change out the axles themselves, or just the gears?
One thing I'm a fan of is really low crawl speed. In all my adventures I've wanted for a slower crawl. Is this a good way to slow it down in 4-low without swapping the transfer case?
02-06-2013, 01:57 PM
#27
JK Enthusiast
02-06-2013, 02:03 PM
#28
JK Freak
Join Date: Oct 2009
Location: Loganville, Georgia
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Which is what I'm doing in 2 weeks JKU 35's but km also running a super chips
Sent from my i5 using just one thumb and tapatalk
Last edited by Flyingbrian; 02-06-2013 at 02:06 PM.
02-06-2013, 02:24 PM
#29
JK Enthusiast
Join Date: Aug 2012
Location: Atlanta
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I guess this is just goin to come down to a matter of opinion. There are too many Jeeps out there running 4.88s to 5.38s with no problems at all. I feel like you can bust up a set of 4.88s just as easily as 5.13s IMO.
02-06-2013, 03:52 PM
#30
JK Freak
Join Date: May 2011
Location: Houma, La
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At (a hard-to-reach) 70-mph, my ’09 JKU automatic w/3.73’s is taching about 1,800 RPM in overdrive on 33-inch Procomp 305’s. The RPM’s jump to 2,800 with the overdrive turned off.
My biggest complaint is on highways and how the transmission is always dropping out of OD on even the slightest incline. I’m forever turning off the OD. The motor really spins, but at least I get some throttle response.
According to the Gear chart, looks like the 70-mph sweet spot is between 2,400 and 2,500 running 4.88 or 5.13 gears, respectively. I’m strongly considering 5.13 which would work for 33’s or 35’s.
Before I make the commitment, I’m anxious to learn what regrets I may encounter. Will my 15-mpg average mileage suffer, improve, or stay about the same? Will I still lack highway throttle response? Will there be differential whine? Will I still find myself turning off the OD? What else should I expect? I’m sure I’d enjoy the off-road gear reduction.
Would welcome your experiences.
My biggest complaint is on highways and how the transmission is always dropping out of OD on even the slightest incline. I’m forever turning off the OD. The motor really spins, but at least I get some throttle response.
According to the Gear chart, looks like the 70-mph sweet spot is between 2,400 and 2,500 running 4.88 or 5.13 gears, respectively. I’m strongly considering 5.13 which would work for 33’s or 35’s.
Before I make the commitment, I’m anxious to learn what regrets I may encounter. Will my 15-mpg average mileage suffer, improve, or stay about the same? Will I still lack highway throttle response? Will there be differential whine? Will I still find myself turning off the OD? What else should I expect? I’m sure I’d enjoy the off-road gear reduction.
Would welcome your experiences.
