[grivera]

Originally Posted by HWYSTR455

My Moser 12 bolt is noisy as heck, and I'm on my 2nd US Gear 3.42 ring & pinion in 5k miles. I did carrier bearings at that time too.


.

Did you check the pattern on any of these for S&Gs?

[DanC]

Originally Posted by steve25

So did the OPs noisy gears that got taken out show ware, and in particular show ware that would have lead to failure?

OK, I found a different way to get my pics accessible in my Google Drive.

This is my 3.42 R&P that were removed.

[SRGN]

Might want to check pinion depth.

[PontiacHO]

Originally Posted by SRGN

Might want to check pinion depth.

Pinion depth is determined by gear mesh pattern and adjusted (shims) accordingly. Wondering if the OP got proof-photos?

[mgarblik]

Both of your pics of the ring gear show the coast side of the teeth. At least the wear pattern. Coast side looks OK from what I can see. If possible, a few pics of the drive side of the teeth, (convex side), might help by comparing each side of the teeth. Thanks.

[Half-Inch Stud]

Picts show Pinion depth within range for coast-side.

Drive side could convince need to change shim thickness ( not sure if to inc/dec pinion shim=depth: probably increase shim so big-dia makes more contact) if Drive too inboard.

[DanC]

Originally Posted by mgarblik

Both of your pics of the ring gear show the coast side of the teeth. At least the wear pattern. Coast side looks OK from what I can see. If possible, a few pics of the drive side of the teeth, (convex side), might help by comparing each side of the teeth. Thanks.

Originally Posted by Half-Inch Stud

Picts show Pinion depth within range for coast-side.

Drive side could convince need to change shim thickness ( not sure if to inc/dec pinion shim=depth: probably increase shim so big-dia makes more contact) if Drive too inboard.

For what it's worth at this time, here are pix of the Drive side of the gears...

[Half-Inch Stud]

Geez the engagement looks perfect.
But do i see ring tooth wear, and satin-matte pinion teeth? Should be polished to a shine,

[mgarblik]

Thanks for the great pictures! When I see a pattern like that on a ring gear, my assumption is the pinion depth and the backlash are awfully close to perfect. I might be missing something, but the pattern looks very good to me. Heel, toe, face, flank looks nicely centered on drive and coast side. No sharp cut off on heel or toe. Nice fan out on the contact patch using almost all of the gear tooth. Just not seeing anything. The fact that you have had noise with 2 gear sets makes me wonder if the case has runnout on the mounting flange or a bearing/race issue in the housing. Just not seeing anything in that gear contact. Did the shop happen to say what backlash they were running? Wonder if they checked it in at least 4 places around the ring gear.? I like to check 6 spots.

[Half-Inch Stud]

Hmm, i forgot to think about backlash. Zero backlash, or pre-loaded beyond 0 lash might become hyper-tight when warmed-up. Might explain the matte-satin teeth?

Do you remember it being tight to turn, or zero backlash feel?

[b-man]

Axle housing bent possibly ?

Not all that unusual, if it is bent that may cause it to be noisy due to bearing misalignment.

[PontiacHO]

Pinion nut was coming loose or bearings or pinion races weren’t fully seated.