RepairPal is your advocate for car care advice and guidance

Q: how do i know when the diferental is going out on my 90' chevy blazer
on 1990 Chevrolet Blazer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
my chevy blazer is making a clanking sound any time it is in gear.
checked the universal joints and they seem to be fine. the clanking is getting loader and loader. it is not just once but repeated.

No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
The vechicle will buck in and out and the engine will actually jump. You can observe this with vechicle on a lift or all four corners secured on jack stands. Do not go under vechicle but observe from side, have someone put vechicle in drive and press on gas and you will see it "buck violently" and make the noise. The shaft going to the rear wheels may not turn at all if this is a 4wheel drive transfer case issue and that severe. If so, you will need to replace the transfer case.
Didn't find what you were looking for?