Having problems with your 1992 GMC Jimmy ?

92 gmc jimmy 4x4 problem!!!

\015 I have a 92 gmc jimmy v6 4x4 and it recently started making a horrible noise like a lawnmower or like having a baseball card in your bike spoke intesified by 100. i have had some tell me it is my transfer case or u joints. Some have said it is my brakes. it only happens while in forward motion i.e. drive, 2nd ,1st, nuetral at forward motion. i had a buddy look it over he told me my 4wd is jammed and said he got it to go into 2wd and the noise went away i was at work and did not witness this. but he also told me i should have some type of plastic gears that lock my wheels into 4wd,but i cannot locate this. He also said that once you get in the 45-70mph range the noise goes away. please any help would be wonderful. I can not afford a new transfer case so i dread that thought.\015 Posted / edited by AnonymousUser on : 22-07-2019

Answers :

If this vehicle has a smog air pump, it could be the gulp valve. It is likely to make noise on deceleration because it is vacuum controlled. But, can make noise other times also.
Repair Help & Product Troubleshooting for 1992 GMC Jimmy

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