Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[copey]

Hiya,put a post on few weeks back about trying to find a noise from either transmission or back axle,have finally been able to take it to a guy who I have always had greay  faith in and he reckons there is alot of backlash in the rear axle,which apparantly needs the crown wheel and pinion re setting,which he thinks involves the use of shims etc and setting to various torque levels...,..what do you reckon ?..is this a specialist job ie main stealer peeps,or,just put up with the noise...(which is similar to running on M/T or on a chunky type tread tyre)..

[Anonymous]

Copey

What miles has yours got? Fear its an answer from the Doc I'm afraid.........

[copey]

Stew..121700m so its got a few under its belt

[Anonymous]

Hmm.....from what I've read on various sites I fear its the diff...hopefully Dr Mike will post with words of wisdom

[greggmo]

me and manda are only just up the road from you. if i could have a listen i might be able to give ya a clue. if it does need a re-build, i am sure we can piont ya in the right direction mate.

[copey]

Hi Greggmo,sorry for delay in getting back to you.haven`t been able to get onto the forum all morning,dont know whether the prob was at my end or not..
Would like to take you up on that offer,when ever its convenient for you ,just let me know...I am at home all the time so any time to suit you...cheers.

[Mike Pavelin]

If the gears are wailing in the rear diff (usually changes note/volume on/off the power) it is usually down to bearing wear, which causes loss of preload in the bearings, and in extreme cases changing the position of the pinion in relation to the ring gear. This has happened gradually over 120000 miles, so the ring and pinion would have also worn a little at the same time. At this mileage the best fix would be to replace the ring and pinion, all the bearings, and reset the whole lot. However, replacing the bearings and reusing the existing shims is usually a near enough fix, as the bearings are manufactured to very tight tolerances, so should be exactly the same size as the originals, which will return the ring and pinion to their original factory settings, give or take any difference caused by slight wear in the gears themselves. I have found that replacing the bearings, and trying to reset a worn high mileage ring and pinion back to factory tolerances can make it noisier than replacing all the bearings and leaving the shim sizes well alone.
My verdict; At 120K spend the extra couple of hundred and fit new gears when you rebuild. It will live much longer in the long run.

[copey]

Thanks for that Mike,appreciate it...the question then to be asked is ..who can do it,is it a dealer job,ie special tools etc etc,or could a local spanner man do it..hmm possibly not.

...........................ANY VOLOUNTEERS... .................

[Mike Pavelin]

To do the job properly from scatch with new gears you need a special set of dummy bearings and spacers to determine pinion height and shim sizes, plus DTI gauge, Dana axle spreader and bearing pullers. It's best left to a properly equipped workshop. A 4x4 specialist with Jeep experience or a good transmission shop should be able to do the job. You would definitely pay through the nose at dealer prices. An experienced person should do it in around 5 hours, to give an idea of labour costs, plus you need all your parts and oils. Don't forget to have the Lsd checked while it's out, too.

[copey]

Mike,just come across this on e/bay,do you think this would be ok(cost is about £295 I think..want another £245 for the limited slip differential kit.

JEEP CHEROKEE AND GRAND CHEROKEE AXLE REBUILD KIT

 

Will suit most UK Cherokee and Grand Cherokee with Dana 35 Axle. 90% of UK Jeeps have this axle.

Kit includes:

    *
      Brand new OE crownwheel and pinion Ratio 3.55:1   ( Most common European ratio )
    *
      2 x Timken Pinion bearings
    *
      2 x Timken Differential bearings
    *
      Pinion oil seal
    *
      Pinion locknut
    *
      New crownwheel bolts
    *
      Assorted pinion height shim pack
    *
      Assorted differential shims
    *
      Instructions

This is a complete rebuild kit.

All parts are genuine OE parts as fitted by Chrysler Jeep. Current UK Jeep dealer cost approx 575.00 UK pounds + Vat.

[Mike Pavelin]

Yes, but you need to check your diff ratio to make sure it's correct.

[daggie]

try lighthouse first    you'll be supprised

[copey]

Hi Mike..finally able to check the tag on that rear diff and apparantly its got the.3.73 diff,so that throws my bargain off e/bay out of the window which was for a 3.50,which is what 95% of all other GC are fitted with,sods law init..back to the drawing board..

[daggie]

is it deisel perchance

[copey]

Potentially good things going on in the background.. ,looking promising,if I tell you now I`d have to kill you...


Sorry daggie,I thought I had replied to you but I must have sent it to cyber-space or somat...no its not a diesel,just and "ordinary" 4 litre auto..

[daggie]

deisel stuff is rarer than rocking horse shit    & more spensive so I have found out  

[copey]

Well the end to my problems is almost insight,thanks to a VERY HELPFULL genlleman at .REDNEXX..
ie Mik Stansfield..this guy has bent over backwards to help in
 this matter,something not many places do these days...

Thanks alot Mik,really appreciate it..

IF YOUR DIFF IS FEELING LOW AND YOU THINK ITS "GONNA BLOW"..REDNEXX IS THE PLACE TO GO

[copey]

See you Tuesday Mik..