80 series tyre problem
Submitted: Friday, Oct 27, 2006 at 20:07
ThreadID:
38889
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2430
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3
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Member - Peter R (QLD)
Final report. re post 38498
The diff housing turned out to be bent (on right hand side) as suggested above.
Had it straightened , as best they could and reading after job on rear axle is
Total Toe 4 mm
LH +2mm
RH + 3.8MM
This is down from total of 8mm
Also had the Cast-O-line bearing kit fitted to front and Total Toe has moved from 7.2mm (LH +2.8 RH + 4.4) to
-1mm (LH -1.1 RH +1 )
Front axle caster now reads
LH +2.73 degrees RH +1.97 degrees
Hopefully all OK while the bank balance recovers.
Many thanks to all who responded to my initial enquiry.
Pedro
Reply By: FZJ 80 - Friday, Oct 27, 2006 at 20:48
Friday, Oct 27, 2006 at 20:48
Pedro.
The rear axle (I Presume you are talking about rear) of lh 2.0mm and rh 3.8mm is a worry, this is a total toe of 5.8mm, not 4mm, but anyway it should be zero.
A common problem with bent diff housings is repeated broken axles or more commonly the axle studs on floating axles,which your 80 will have.
If the figures are correct, ie the alignment machine is accurate and set up correctly it might be time to concider a good used diff housing.
Regards
Greg
AnswerID:
201318
Follow Up By: Member - Peter R (QLD) - Friday, Oct 27, 2006 at 22:18
Friday, Oct 27, 2006 at 22:18
Thanks Greg,
Correct reading was .2mm+3.8mm = 4mm, so this is where the 4mm came from .
When I collected car, was advised that it was a bad bend and that this was the best that could be done, but that it would solve the problem with regard wearing of tyres on the rear.
I saw the axle before the "operation" and a rod inserted inside was definitely
well off centre on right hand side.
Am a complete novice (wood duck) with regards mechanicals and I accepted that i would have no more trouble with tyres which was my aim.
In your opinion is this the case or what action should i consider with the firm that fixed the bend?
Pedro
FollowupID:
460631
Reply By: FZJ 80 - Saturday, Oct 28, 2006 at 20:19
Saturday, Oct 28, 2006 at 20:19
Pedro.
May
well be the case that the firm is unable to straighten the axle tube any furthur. if that is the case then that is it unless you want to replace the housing complete. The workshop would not know exactly how straight they could get the tube until trying the repair, i wouldn't give them too hard a time. I presume that your tyres are wearing the outer shoulders with the toe in figures supplied. My worry is the risk of breaking a rear axle (RH SIDE) or the hub studs as with a bent axle the wheel hub will run slightly off what should be 90 degrees to the diff centre. the easiest way to tell is to undo the nuts and washers on the axle leaving wheel on the car, slide axle out slightly and see if the axle sits centrally in the tube,if its sitting one side and requires some force to push central then the axle will constantly be bent throughout 360degrees slightly as you drive. then push the axle back in and see if it sits flush to the hub, if it's touching at the front of the hub but has a gap of say 1mm at the rear this would be a concern,as the axle turns the studs are stressed. make sure the nuts are tightened to correct torque when refitting and also the axle gasket may tear and need replacing. My old neighbor has a 60 series that has a bent lh axle tube and has had the studs break twice over the last probably 5 years. i'm not sure what his toe in (bent) figures are,.
Hope this makes sense
Regards
Greg
AnswerID:
201476
Follow Up By: Member - Peter R (QLD) - Saturday, Oct 28, 2006 at 21:32
Saturday, Oct 28, 2006 at 21:32
Greg,
Appreciate your further comments.
I would mention that for past 10 years I have had abnormal readings on rear, and unfortunately no one suggested it might be a bent housing.
As i said earlier my tyres on rear for these 10 years have worn out on outside at a rapid rate.
Prior to the straightening the reading was 8mm
Because nothing has happened to studs,with such a
big bend in the past, does this change your mind on possible problems with studs now?
In any event I will chase up your comments with RACQ and the firm that did the job.
Really appreciate your helpful advice.
Pedro
FollowupID:
460817
Reply By: FZJ 80 - Saturday, Oct 28, 2006 at 21:56
Saturday, Oct 28, 2006 at 21:56
Pedro
If there hasn't been any problem with the axle or studs when the toe in was substantially more than it is now you are less likely to have more drama. As i said before,my neighbors has broken studs twice due to a bent tube but i don't know what his toe in/out is, it may be say 10mm which would cause higher forces than what yours was at 8mm. If you didn't ever have axle/stud problems over 10 years it really is up to whether the excessive tyre wear is resolved.
Regards
Greg
AnswerID:
201505