Gear Question...
05-07-2013 | 08:44 AM
#1
Thread Starter
JK Super Freak
Joined: Nov 2008
Posts: 1,276
Likes: 0
From: Ottawa Ontario
Gear Question...
Got gears installed last Friday... Used AEV Procal to set for 4.88 gears...When I'm cruising steady speed 40.km - press
pedal very lightly...small delay kicks in then makes a " clac " sound...It does it all the time...Mechanic mentioned Auto- tranny
has to be reflashed...or shims need to be added ...Any thoughts here...
pedal very lightly...small delay kicks in then makes a " clac " sound...It does it all the time...Mechanic mentioned Auto- tranny
has to be reflashed...or shims need to be added ...Any thoughts here...
05-07-2013 | 10:41 AM
#5
JK Super Freak
Joined: Oct 2009
Posts: 1,381
Likes: 1
From: East Bridgewater, MA
At a minimum, you want to pull the diff covers and check your new gears ASAP. Have the shop double and tripple check the pattern to make sure they are setup properly. Even if the issue turns out to be nothing related to your gears, you want to do this ASAP just to rule them out. If they are setup incorrectly, that will be catastrophic when they fail.
Condidering the noise started after the gears were installed......all signs point to those being the issue. Recalibrating the computer won;t cause the issue you are describing.
I would also check the driveshafts and make sure everything is tight. If the pinion nut isn't properly torqued and there is play in there, that could be causing a clank sound.
Condidering the noise started after the gears were installed......all signs point to those being the issue. Recalibrating the computer won;t cause the issue you are describing.
I would also check the driveshafts and make sure everything is tight. If the pinion nut isn't properly torqued and there is play in there, that could be causing a clank sound.
05-07-2013 | 12:40 PM
#7
JK Jedi Master
Joined: Jan 2008
Posts: 11,463
Likes: 162
From: Austin <--> Colorado Springs
You are pretty sure that there is a problem, and the decision is to just keep driving? 
If you don't want to check into it yourself, and you can't take it back until Friday, at least try and find another vehicle to use until then.
From Randys R&P:
Another thought - did you happen to have an auto-locker installed at the same time?
If you don't want to check into it yourself, and you can't take it back until Friday, at least try and find another vehicle to use until then. From Randys R&P:
What is this whirring noise?
Whirring noise only while decelerating at any or all speeds is most likely caused by bad pinion bearings or loose pinion bearing preload, and almost never by bad ring and pinion gears.
A howl or whine during acceleration over a small or large speed range is usually caused by worn ring and pinion gears or improper gear set up.
Rumbling or whirring at speeds over about 20 mph can be caused by worn carrier bearings. The noise may change while turning.
Regular clunking every few feet may indicate broken ring or pinion gears.
Banging or clunking only on corners can be caused by broken spider gears, lack of sufficient positraction lubrication, or worn positraction clutches.
Rumble while turning may indicate bad wheel bearings.
A steady vibration that increases with the vehicle’s speed can be caused by worn u-joints or an out of balance driveshaft.
Clunking only when starting to move or getting on and off the gas might be loose yokes, bad u-joints or worn transfer case or transmission parts.
What is that clunking sound I hear while turning?
A clunking sound that only occurs while turning is a result of broken or damaged spider gears. Spider gears do not move at all while traveling in a straight line. If this is the case then the spiders will need to be replaced and possibly the carrier as well. Be sure to inspect the ring and pinion to be sure broken debris did not damage it as well.
Whirring noise only while decelerating at any or all speeds is most likely caused by bad pinion bearings or loose pinion bearing preload, and almost never by bad ring and pinion gears.
A howl or whine during acceleration over a small or large speed range is usually caused by worn ring and pinion gears or improper gear set up.
Rumbling or whirring at speeds over about 20 mph can be caused by worn carrier bearings. The noise may change while turning.
Regular clunking every few feet may indicate broken ring or pinion gears.
Banging or clunking only on corners can be caused by broken spider gears, lack of sufficient positraction lubrication, or worn positraction clutches.
Rumble while turning may indicate bad wheel bearings.
A steady vibration that increases with the vehicle’s speed can be caused by worn u-joints or an out of balance driveshaft.
Clunking only when starting to move or getting on and off the gas might be loose yokes, bad u-joints or worn transfer case or transmission parts.
What is that clunking sound I hear while turning?
A clunking sound that only occurs while turning is a result of broken or damaged spider gears. Spider gears do not move at all while traveling in a straight line. If this is the case then the spiders will need to be replaced and possibly the carrier as well. Be sure to inspect the ring and pinion to be sure broken debris did not damage it as well.
Another thought - did you happen to have an auto-locker installed at the same time?
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05-08-2013 | 03:25 AM
#8
Thread Starter
JK Super Freak
Joined: Nov 2008
Posts: 1,276
Likes: 0
From: Ottawa Ontario
Only got one vehicule for now...not driving it hard at all - actually not over 90 k...
45 KM both ways to work...Friday AM heading up...Let's see if this guy really knows what he's doing...
45 KM both ways to work...Friday AM heading up...Let's see if this guy really knows what he's doing...