I have a 2003 half a ton chevy silverado that the driver side rear axle is leaking. I need to know how to adjust the shims on the ring in pinion ?

So it really is only a jeep XJ body ,not a real jeep
sure loved by all sure.

jeep has 2003 avalanche LS5.3 ENGINE AND 4L60E TRANS WITH A 6" Lift (ouch)
on 37" tires

with 1979 Ford 3/4 ton rear ends.

with NP231 transfer, np207 gone now with new NP231 transfer case from the '91 YJ ?, NO, from a CHEVY
I bet now it is NP231C box, the C means Chevy box.
with

2H, 4H, N, and 4L,, this is part time 4wd, not full and is not for the 4wheeling on pavement. only offroad or on ICE.
ICE means, just that or snow or snow over ice. (sorry captain Obvious, just left the building,now)
end ICE answers
begin, 6" lift extreme problems
the real problem is the LIFT that high.
3 "easy
4 hard
6 "extreme lifts.



IT fails in 2wd mode too, that is because U-Joints have limits. (all do) and the lift span chart below.(angle) post.
nothing else needs to known, but U-JOINT ANGLES are all WRONG.


SOLVED,. the 6" lift done wrong. YJ is a very short Wrangler and very short rear prop shaft.
that means Prop(rear) drive shaft angles are dead wrong. (solved the reason on 1 fact)

DOne with no SYE kit. "slip Yoke Eliminator"'

https://www.amazon.com/Heavy-Eliminator-52231-18676-60-Driveshaft/dp/B00FDWL7PM


done i bet with no shims for rear axle LEAF spring perches , to get angle right(they sell shim kits)

the answer
You need a double cardan or CV (same piece different name) at the TC case, this will require a new yolk. You will also need to shim the pinion angle to get the driveshaft and pinion within 2 degrees of each other.

I don't know but if there is one it shouldn't be too difficult to find.

Some axles have a torque figure and the bearing preload is adjusted by graduated spacers or shims but some axles use a single use collapsible spacer and the pinion nut must be tightened until the correct bearing preload is reached.
Carrying out work on that type of axle that doesn't require the axle to be dismantled such as replacing the pinion oil seal means the nut should be marked prior to removal and returned to that position - plus a gnat's wotsit, so the pinion bearing preload limit isn't exceeded.

I suggest you discover the type of axle you have before you begin work.

No chances are it probably won't you will have to take the rear differential cover off and get the numbers off of the ring gear divide the small number into the big number and it'll tell you what ratio the ring gear and pinion are

you can remove the axles and the drive shaft then open the differential to remove the carrier gear assembly(ring gear,side gears)then remove the pinion gear.replace these with the new gear set and get the clearance specs for the pinion depth and carrier gear clearance and adjust until within specs.you can either pickup new gear sets or one from the wreckers with the shims to start with.you will need a backlash dial gage to know if the backlash clearance is within specs as well as marking ink to know if the gear mating surface is riding in the proper area of contact.

The ring gear is bolted to what is called a ring gear carrier, the carrier is bolted inside the rear end housing with two bolts on each side, it is shimmed on each side to adjust backlash and pinion depth so DON'T mix up the left and right carrier shims, once the carrier is out with the ring gear attached you can remove the pinion shaft and drive out the bearing races of the pinion bearings. You also need to remove the pinion flange where the drive shaft U-Joint attaches, just hammer it off with a brass faced hammer (a steel hammer will run the flange) once the large center nut is removed.

For the rear diff., remove the driveshaft, brake drums, diff. cover, remove pinion flange nut, move diff carrier to access side gear retainer bolt and remove bolt, slide side gear pin out and push axles in to remove axle retainers and remove axels. Mark carrier bearing retainers, spin bearing retainers to loosen carrier for removal. Remove carrier, remove pinion out of diff case, then r&r bearings. Any shims should be replaced in their original location for depth and pinion to ring contact.

TAKE TIRES OFF, REMOVE DIFF. COVER, ON 3rd MEMBER THERE A PIN ABOUT 11/2" DIA. THAT GOSE RIGHT THOUGH THE 3rd MEMBER CLOSE TO ONE OF THE ENDS OF THAT PIN OPOSIT OF RING GEAR THERES AN 8mm SMALL HEAD BOLT ( TURN RING GEAR TO CHECK OTHER END OF PIN ) REMOVE BOLT PUSH AXLE IN REMOVE HORSE SHOES CLIP IN 3rd MEMBER SLIDE AXLE OUT.

Hi..
On your 05 Chevy 4X4 2500HD.
The Pinion Yoke Nut, 9.75" Axle. the torq spec. is 370 Nm. -- 273 Lb ft.

I hope this help on your question.

Thank you for use fixya...

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