Need help with gear install!
Thread Starter
Launching!
Joined: Jan 2003
Posts: 269
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From: Northeast Baby!
Need help with gear install! Well I'm gonna tackle it 
my Moser 12-bolt whines and howls like a bitch at decel & coast. I just removed it from the car (doing a few other things too 
) and need to clean her up and check the backlash, tooth pattern, etc..
Well 1st Q - whats a good cleaner that will not attact the Eaton Posi unit or bearings?? Will brake cleaner be OK??
2nd Q - Found quite a few install instructions on the net but does any one else have links too ones they think are good??
3rd Q - Installation packages.....will any for a 12-bolt do or is the Moser special in any way??
Thanks guys
my Moser 12-bolt whines and howls like a bitch at decel & coast. I just removed it from the car (doing a few other things too ) and need to clean her up and check the backlash, tooth pattern, etc.. Well 1st Q - whats a good cleaner that will not attact the Eaton Posi unit or bearings?? Will brake cleaner be OK??
2nd Q - Found quite a few install instructions on the net but does any one else have links too ones they think are good??
3rd Q - Installation packages.....will any for a 12-bolt do or is the Moser special in any way??
Thanks guys
Brake clean is fine.
There are a few writeups on the net but I dont know of any offhand, until you can figure out how to get a good pattern reading (unless you have a pinion depth gauge) dont even take it apart. If you are trying to re-setup a set of gears that are whining you will not have very good luck unless you have no miles on them. Worth a shot though if it annoys you that much I guess
Nothing special about the moser except the axle bearings, everything else is regular 12 bolt car axle stuff..
There are a few writeups on the net but I dont know of any offhand, until you can figure out how to get a good pattern reading (unless you have a pinion depth gauge) dont even take it apart. If you are trying to re-setup a set of gears that are whining you will not have very good luck unless you have no miles on them. Worth a shot though if it annoys you that much I guess
Nothing special about the moser except the axle bearings, everything else is regular 12 bolt car axle stuff..
Thread Starter
Launching!
Joined: Jan 2003
Posts: 269
Likes: 0
From: Northeast Baby!
Little update.... 
From a quick inspection in good light you can see that the drive side favors the heel. From what I've read this means that the pinion shim is correct and a decrease in backlash is required if the coast favors the heel. Otherwise if the coast favors the toe the backlash is correct but a thicker pinion shim is required. Now if it is the case that only the backlash needs to be adjusted would be OK to just tighten it up even with about 2K on the rear since the install or will things need to be completely redone??
Oh last thing the breathers on the Moser rear are on the axle tube and even with 1 1/2 feet of tubing hung up it **** fluid all over the rear and muffler and in the end it is lower on fluid. How can I resolve this?? Place breather near top of pumpkin?? Any input??
From a quick inspection in good light you can see that the drive side favors the heel. From what I've read this means that the pinion shim is correct and a decrease in backlash is required if the coast favors the heel. Otherwise if the coast favors the toe the backlash is correct but a thicker pinion shim is required. Now if it is the case that only the backlash needs to be adjusted would be OK to just tighten it up even with about 2K on the rear since the install or will things need to be completely redone??
Oh last thing the breathers on the Moser rear are on the axle tube and even with 1 1/2 feet of tubing hung up it **** fluid all over the rear and muffler and in the end it is lower on fluid. How can I resolve this?? Place breather near top of pumpkin?? Any input??
Make sure your rear isnt overfilled, if you have the aluminum cover fill it to plug in the side of the diff, not the top hole of rear end cover, 2nd make a loop with the line a couple turns (see pic) never leaked a drop out of the vent in my 12 bolt or 9" like this..
This is pretty good and has pics of different patterns.
http://www.randysringandpinion.com/tech/yukoninst.pdf
http://www.randysringandpinion.com/tech/yukoninst.pdf
Thread Starter
Launching!
Joined: Jan 2003
Posts: 269
Likes: 0
From: Northeast Baby!
Originally Posted by 2xLS1
This is pretty good and has pics of different patterns.
http://www.randysringandpinion.com/tech/yukoninst.pdf
http://www.randysringandpinion.com/tech/yukoninst.pdf
that is the best I've found so far Thanks! Trending Topics
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