80 Series Tailshaft
Submitted: Thursday, Jul 12, 2007 at 19:25
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Member - Ian H (NSW)
Hi all,
I was getting a bit of backlash in drive train of our 80 and thought maybe the box was suffering from too much driver off road fun. I asked at our local Toyota dealer and the workshop manager told me to first check the greasing off the slip joint. He said to load it up with Castrol LMM grease, not just 7 pumps but 15. I put in 21 and guess what, the backlash is gone. Now the grease hasn't repaired the wear in the splines which is minor but noticeable but it seems to keep the movement under control. I will have to get it resplined one day but till then a good grease seems to fix the problem. This will apply to all 4bies I guess. Has anyone else had a similar experience?
Reply By: Member - Phil G (SA) - Thursday, Jul 12, 2007 at 19:53
Thursday, Jul 12, 2007 at 19:53
Sure, your extra grease has taken out the slack temporarily.
But its not a good idea for the rest of us. If you pump a heap of grease into the sliding yoke, you can push out the plug that seals the end of the shaft. It also is a cause of vibration when the shaft pushes against each end.
Tailshaft link
AnswerID:
252108
Follow Up By: Member - Phil G (SA) - Thursday, Jul 12, 2007 at 19:55
Thursday, Jul 12, 2007 at 19:55
Just to add I only put 2 pumps in the yokes each service.
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513173
Follow Up By: Max - Sydney - Thursday, Jul 12, 2007 at 20:13
Thursday, Jul 12, 2007 at 20:13
Ian's mechanic is right - the grease shuts up the vibration, but only for a while and can cause trouble in the long run like Phil says. The grease can damage the seals, and as the joint flexes (even over bitumen roads) you get more grease thrown out on to the bottom of the car.
Prevents rust I guess but not a pretty smell when it gets on the exhaust box.
I insisted on new shafts as a permanent cure - the mechanic could not get a non genuine rear one but it had less slop so I am doing ok for now. As a compromise I put ten pumps into that joint but know where it ends up. It certainly damps the odd vibration for 5000 kms or so though. The new one in the front only gets four or five pumps.
Its a bit of a compromise.
Max
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Reply By: Middle Jeff - Thursday, Jul 12, 2007 at 20:14
Thursday, Jul 12, 2007 at 20:14
Hi Ian
I just recently replaced my tailshaft on my 80. Loading the slip joint with oil means it is no longer a slip joint so every time you hit a bump instead of sliding up the joint it forces the shaft into the transfer box. A tailshaft is cheaper than a transfer box, at best it is a short time fix but the long term damage could be really expensive.
Have fun
Craig
AnswerID:
252113
Reply By: drewab - Friday, Jul 13, 2007 at 17:15
Friday, Jul 13, 2007 at 17:15
Ian,
A few years ago I was repairing, fabricating and balancing all sorts of drive shafts for a living, and we used to always drill a 1/8 or there abouts hole in the cap in the slip yoke to stop the cap popping off . We greased all shafts till grease came out the hole in the yoke and out of the seals on uni's. If you are keen mark your drive flanges and shaft flanges with a centre punch each end, mark the slip yoke and slip stub with a paint marker and take slip yoke off the gearbox and drill a hole in it. Just make sure it goes back the same way or it will vibrate. It's called in phase. FYI, most truck slip yokes come with a hole already in it.
Hope this helps
Drew
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