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I was having my driveshaft balanced and then rebuilt and he needed the rear yoke pulled off and brought to him.well against my better judgment I pulled it without marking it and now I'm worried about reinstalling it and blowing the whole differential. my 66 mustang has an 8.8 or 9 inch rear but I don't know which. did he have me do that so he could send me to his Buddy's shop?
That's weird... why did he need the pinion yolk?
Anyway, there is no big deal with placement as the pinion is splined. There is no wrong spot unless your splines are keyed.
It is a good idea, but not required to re-check your lash between your pinion and ring gear after you re-install the yolk.
Although, this will require removal of the third member... so most don't bother.
^^^what he said.
Unless there is a master spline don't worry about it. Differential assemblies are not balanced and if somebody had one that was balanced they overdosed on anal. I can appreciate the drive shaft guy wanting the yoke to factor it in but probably unnecessary.
Just make sure it gets torqued properly going back together and the backlash is right otherwise you will be doing a rear end soon.
Might as well toss in a new pinion seal while your at it.Quote:
Originally Posted by trlcavscout
I am not sure how the pinion depth is set on a Mustang, but on a GM it is done via a crush washer. On a GM diff, if you remove the yoke you almost always have to replace the crush washer and redo the pinion depth setting. I have seen several GM diff's get nuked after someone has remove/replaced the pinion yoke without replacing the crush washer and redoing the pinion depth. They simply crank on the pinion yoke and it pulls the pinion depth out of alignment and it screws up the ring and pinion mesh, resulting in a howling diff that eventually fails.
If you have not properly setup the backlash on a diff before, it may be worth the time and $$$ to take it to a shop to do it right. I consider myself a fairly competent weekend warrior mechanic, but screwing around with the diff backlash is something I will not touch with a 10 foot pole. I have learned that lesson the hard way already.
How can I do that? I don't have the tools.
If you don't have the tools or knowledge to properly setup the backlash / pinion depth, then simply take the diff out and bring it to a shop that has experience in doing it.
You probably have an 8 inch rear end. Just install a new seal while you're at it.
The seal is getting changed for sure.