| Differential repair
1989 GMC Van, 3/4 ton, 5.7 l (350 cu in) engine, conventional differential
Hi, I opened a differential because there was a whining noise when cruising at 80km/h. I found one of the pinion gears has a broken tooth and several others teeth are pitted. I took both pinion gears out, the other looks fine. I also checked the side gears (the ones driving the axels) they seems fine as well a crown gear. I phoned around and I was told by GMC dealer that they sell an o/h kit for $ 1,000.- but non is available across Canada! They suggested to ask an independent "rear end" supplier to get a pinion kit.
Do I have to replace all gears at once or is it ok to replace only the damaged one? Also do I have to adjust/shim some clearences? What to watch for?
Thanks for a reply! Danigo |