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1986 gt pinion troubles 911 please help.

820 Views 5 Replies 3 Participants Last post by  big gear head
Okay soooo went to replace my pinion seal. I was going to put in some new 3.73s but It already had them. so I figured ok ill just do the seal. the diff fluid and the cover gasket. well it took me 5 secs to take off the shaft and remove the pinion bolt with my fingers. that easy. the fluid was leaking from the loose pinion shaft bolt. Before I took it off There was alot of play in the pinion as soon as I took the driveshaft off. now the teeth on the pinion look good. everything in the diff looks good. but what do I torque the pinion bolt too? My plan was to count the threads and mark it all up the way it came off. PLEASE HELP. Thanks again....
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I guess instead of apprentice it should say dependant. lol
and where is this crush sleave suppose to be because I just pulled the bearings off my pinion shaft and I dont see one. bearings look new though.
Its been a while since I last done a rear end (no pun intended)... I remember when I installed the yoke back on the pinion I always rattle jacked it real quick. Then you use a torque wrench to find the "running torque" or the lightest amount of torque it takes to make the pinion spin continously. There should be torque specs around the internet for that. As for the crush sleeve I can not recall its installation location at this time.
yea winged it. did exactly what you said. found the specs and all that off youtube. what a pita. used loctite on it too and rtv on the back of the bolt faceing the teeth. was a pain because I had to go on how much torque by how much play there was in the pinion. nice and tight now. doesnt have any play at all. I was going to do a write up on it but I got so pissed doing it because I only had a foot and a half of work space under the car. not to mention I put in the new pinion seal and looked down to see the pinion bearings slipped out while I was getting the seal out of my truck. lmao. had to gently take it out and reinstall with rtv after I put back in the bearings. Thanks again
The crush spacer goes on the pinion shaft just behind the outer pinion bearing. It's possible that someone who didn't know what they were doing left it out when they installed the 3.73 gears. If that's the case then you are screwed. My advice would be to get a pinion bearing kit and set up the pinion again the correct way. You don't want to try setting the pinion bearing preload with used bearings that have been run loose.

If the crush spacer is there and you just didn't see it then you can fix the problem easily. Just clean everything and put in the new seal with a thin film of RTV sealant around the outer edge and grease the rubber lip. Then smear some RTV into the splines of the yoke and put it back on. Then use a new pinion nut with red locktite and torque the nut to 125 to 150 foot pounds and it should be fine. If the bearing preload was set correctly the first time with the crush spacer installed then this will get you very close to the same setting.
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