8 3/4 stocker rear

[Phillip marvetz]

Sound's like the pinion depth was wrong to me also.

[gmonde]

i normaly run the pinion pattern on the toe rather than the middle of the drive tooth but some times came be real noisey,,but i will have to do that on the next set ,and your right about checking it before the season started , if that had let go i could have lost the trans as well ,,i will contact jim ,,,thanks for the replys gmonde

[Run to Rund]

Originally Posted by John Dinkel

Could be pinion depth not in far enough.

I agree. The cracked areas seem to be to the outside of the ring gear. Under load, the outer part of the teeth may be bearing too much of the load. Perhaps this is not the only factor, but I'd sure put the pinion in a little deeper next time.

Many guides to setting up a r&p show a centered pattern on the drive side of the ring gear tooth. However, you can't get enough of a load using a rag to cause drag on the bench, and you should put the pattern to the inside of the tooth. It will spread only to the outside under a real load. Check and you will see that the wear didn't go any farther to the inside under use than it was when set up. OTOH, the wear spread from the mock-up pattern towards the outside of the gear.

[George Mirza]

Richmond Gears? I have cracked and broken the teeth of a few sets over the years. I think they are to hard and brittle. I have an old set of Zoom gears that have lasted forever.

Check the pinion depth, that could be some of the problem.

I have always run the 742 case with 1 3/4 straight pinion, some have trouble with the 489 case tapered pinions, they want to push back under load and crack the caps.

With the weight you are carrying you are close to the limits of this rear without some upgrades.

I have only heard good things about Jim Bailey's treatment, my next set of gears will be done. Can only help your situation.

George

[gmonde]

Originally Posted by George Mirza

Richmond Gears? I have cracked and broken the teeth of a few sets over the years. I think they are to hard and brittle. I have an old set of Zoom gears that have lasted forever.

Check the pinion depth, that could be some of the problem.

I have always run the 742 case with 1 3/4 straight pinion, some have trouble with the 489 case tapered pinions, they want to push back under load and crack the caps.

With the weight you are carrying you are close to the limits of this rear without some upgrades.

I have only heard good things about Jim Bailey's treatment, my next set of gears will be done. Can only help your situation.

George

george:this a 489 case with mark willaims caps,billet spanners,if i stayed with 85/140 i dont think this would of happened but looking for et some time's cost gmonde