80 Series Diff Query

Submitted: Tuesday, Oct 26, 2004 at 21:04
ThreadID: 17335 Views:3223 Replies:6 FollowUps:2
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Hi all.

Just noticed some diff oil on the ground under my 1991 80 Series Landcruiser. Seems to be coming from the front of the (rear) diff, near the flange where the tailshaft joins it. My immediate guess is I have done a seal.
Is this a difficult job to repair (assuming it is a seal).

Any help / suggetions etc appreciated before I start going wild with spanners etc etc ....

Thanks in advance ...

Jack
The hurrieder I go, the behinder I get. (Lewis Carroll-Alice In Wonderland)

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Reply By: Member - Graham P (QLD) - Tuesday, Oct 26, 2004 at 21:08

Tuesday, Oct 26, 2004 at 21:08
Do you have a manual, if not I could look in mine and email you a copy.

graham
AnswerID: 81794

Reply By: Utemad - Tuesday, Oct 26, 2004 at 22:25

Tuesday, Oct 26, 2004 at 22:25
Probably the pinion seal. Not hard to change. Mine leaked once after the diff got a gutfull of muddy water.
AnswerID: 81813

Reply By: Member Eric - Tuesday, Oct 26, 2004 at 23:36

Tuesday, Oct 26, 2004 at 23:36
Very common for pinions to come loose ,
AnswerID: 81826

Reply By: tour boy - Wednesday, Oct 27, 2004 at 07:02

Wednesday, Oct 27, 2004 at 07:02
be careful doing the seal yourself as there is a collapsable washer behind the seal and if not done out of the car you can upset the preload and the diff may start to whine and within 10,000- 20,000km the pinion bearings will chew out. Had this happen on a couple of 2nd hand vehicles I've bought. The one I have now was so tight that the diff specialist had to grind the bearings off the pinion shaft.
Regards
Tour Boy.
P.S only use a genuine seal!!!
AnswerID: 81849

Follow Up By: Member - Jack - Wednesday, Oct 27, 2004 at 07:53

Wednesday, Oct 27, 2004 at 07:53
Thanks heaps - I was looking for a way to do it in car .... looks like one for the experts.
Jack
The hurrieder I go, the behinder I get. (Lewis Carroll-Alice In Wonderland)

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Reply By: Member - Graham P (QLD) - Wednesday, Oct 27, 2004 at 10:19

Wednesday, Oct 27, 2004 at 10:19
You need specisl tools to remove tailshaft yoke and the bearing. The book stresses that the colapsable perload washer must be replaced, this washer is behind the front bearing. You are right use the professionals.

graham
AnswerID: 81874

Reply By: Kiwi Ray - Wednesday, Oct 27, 2004 at 14:36

Wednesday, Oct 27, 2004 at 14:36
Hi Jack
You can do this at home with the minimum of fuss.
A couple of things to check first, after removing the tail shaft check that there is no vertical play in the pinion flange and it rotates smoothly but with some resistance, this is the preload.
If you decide to continue, mark the nut and flange, as the spacer is the collapsable type the nut will have to be fitted to exactly this same positionso as not to destroy the preload settings.
With a little care it can be done, if you decide to send it in take the diff head out to save some cash.
You might like to get a spacer made up with shims and do away with the collapsable spacer
Hope this helps
Ray
AnswerID: 81920

Follow Up By: Member - Jack - Wednesday, Oct 27, 2004 at 15:22

Wednesday, Oct 27, 2004 at 15:22
Hi Ray:

Thanks for the tip - it is a little more "fiddly" than I thought, so decided to give it to an expert to fix. That way I get a warranty on the repair. I managed to read up a bit on it and it was those spacers that made me think it would be a job I could easily stuff up.

Very much appreciate your advice. Thanks.

Jack
The hurrieder I go, the behinder I get. (Lewis Carroll-Alice In Wonderland)

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