I have a 1997 GMC Jimmy I am trying to rebuild the rear differential. I need to know how to find what spline I need there is 26, 28, and 30 spline listed. The rebuild kit that I find online is that all I need to buy? I have never had to deal with this before and want to get what I need to get it back up and running.

if it is the same bolt pattern in a banjo housing
(fit in from the drive shaft end not salisbury type-- remove cover and pull crown wheel out from the rear) it will fit
items to consider are axle spline size and numbers and diff ratios
if the ratios are not the same , the swap will cause very early drive line failures

brake lights not working - 1997 GMC Jimmy - RepairPal

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Jan 11, 2011 - hi about 2 days ago i realized my brake lights were not working but my turn signal lights were working and parking lights as well but no brake ...

Tail Lights don't work but third brake light does, not fuses ...

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Sep 23, 2009 - 97 GMC Jimmy 4x4 blinkers work, reverse lights work, above window ... I just lost hazard lights and rear brake lights, they were working 2 days ... If it is a frayed wire or solder point, then you can repair it, but not any worn contacts. ... Does anyone have any suggestions on 1997 Honda Accord tail & brake lig.

"Blue Devil Oil stop Leak", Used this in My 97 Jimmy, Also for my Rear main seal..various other leaks.. WORKED! Didn't believe it would..... Stopped all leaks. Every leak is diff. Depends on How bad of course, but well worth the try.Cheaper than pulling those Axles!, If it doesn't I do believe they will refund your $... Good Luck!

sounds like your rear differential has some internals gone or going bad if it wont move at all in two wheel drive then its probably gone sorry. the planetary and spider gears need replacement or the splines on the rear axles are sheared off take you diff cover off( be ready for about half a gallon of gear oil to spill out.) look real good at the axle shafts and gears try to move stuff around. if there is excessive play that could be your problem. hope this helps

you can try recycle yards, if not you can get a rebuild kit from any parts supplier, be warned to rebuild you will need special tools

On the Differential look at the rear of the Differential near the top and you will see a plug. You remove the plug and check the level by putting your finger into the hole. If the fluid touches the bottom of your finger it is at the proper level. If not, add fluid until it does.

there are rebuild kit's u can find on line, and to keep it from cafing again, u should upgrade the pump and shifting sort's in the tranny there is a kit for tis also, an auto tranny has lot's of part's, clutches spring's ect so it's best to have an experenced teck at least helping u!

Most vibrations are driveshaft being bent,worn u-joint,in need of balance,shocks,wheels,tires and more.I will bet ,swapping the complete rear axle will not change a thing. If it is lifted, you should know your in for problems. If not, and all else fails,strip the rear housing and go through it. The one you swap, may be more worn than yours and not even a good core to rebuild.

trans.defective,rebuild or replace

theres a ingage and disingage sencer up in there sometimes it gets stuck and it sounds bad but if u bang on it with a hammer sometimes it will let go try that