Front Diff Problems - I think

Submitted: Saturday, Aug 09, 2003 at 21:33
ThreadID: 6466 Views:1797 Replies:4 FollowUps:1
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Hope I can get some ideas on this one please!!!!!

Background is this (Bearing in mind I have only intermediate mechanical skills).

98 GU Patrol 2.8TD with 275,000k's

Since changing transmission, trans case and diff oils around 2 months ago the following has occured:-

1. In the last couple of weeks there seems to be a grinding noise coming from front (possibly diff or hubs) only when braking to a stop the first time after a cold start. Totally disappears once warm. Didnt seem too bad until 2 hours ago when it was real loud and finished with a clunk once I had stopped completly.

2. Awkward to get into 2nd gear (also only when cold). This has only occured since oils changed (Gear Oil was as per Handbook 80W-90).

Any ideas????

Also front diff was filled with BP Limslip LSD oil (Same as for rear LSD) but I am assuming that filling an open diff with LSD oil wouldnt be a problem.
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Reply By: B.P. - Saturday, Aug 09, 2003 at 22:15

Saturday, Aug 09, 2003 at 22:15
use a full synthetic oil in the gearbox,the're not goopy when cold like mineral oil.
Not sure on the dif noise,can't see an oil change doing this.Check up on the front disc pads.
AnswerID: 27293

Reply By: Eric - Saturday, Aug 09, 2003 at 22:46

Saturday, Aug 09, 2003 at 22:46
Have a good look at the front brakes and adjust you front wheel bearings. Eric.
AnswerID: 27297

Reply By: Member - DOZER- Sunday, Aug 10, 2003 at 00:10

Sunday, Aug 10, 2003 at 00:10
LSD oil is better than normal gearoil with friction modifier package in the LSD oil. Check all plugs are still in the diff and transmission.
Did you find much crud on the drainplug magnets when you drained?
Andrewwheredayathinkwer mike?
AnswerID: 27310

Follow Up By: Member - DOZER- Sunday, Aug 10, 2003 at 00:17

Sunday, Aug 10, 2003 at 00:17
Give me a call if you want me to have a bow peep.
0408965433 Farmborough htswheredayathinkwer mike?
FollowupID: 18790

Reply By: Mick - Monday, Aug 11, 2003 at 09:51

Monday, Aug 11, 2003 at 09:51
Have you been using 4WD recently. Possible broken CV joint-very hard to brake on the GU but we did it, or automatic hubs is quite common as weve broken 2 sets already and many other people have. put it in 4wd and check if the noise gets worse, cross the truck up and check if both front wheels will spin. The manuel hubs are a lot stronger.
Otherwise it could be a brake problem, does it still stop ok?
Lsd oil wont be a problem in the front diff, only from your pocket, as its a lot more expensive!
AnswerID: 27415

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