Rear end is locked only the front tires spin and only in 4wd
I have a 1998 gmc jimmy 4wd i was in 4lo and the back end locked up diff started leakin gear oil all over the place, back tires wont spin only the front and its clickin and the tranny sounds like **** ... just need to know whats gotta be replaced, she had over 256k's on er too so shes lived a good life.
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Re: Rear end is locked only the front tires spin and only...
I am not really sure unless the truck was in front of me but it sound as if you have a bad pinion gear in the rear end of the truck give these peoples a call they only sells GM-parts Schram auto & truck 1-800-292-1032 and maybe they be able to give you more information then i did.
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Does the driveshaft for the front wheels turn when in 4wd? The actuater might work but the diff lock for the front wheels might have broken. If the front driveshaft does not turn when in 4wd, the transfer case might be the problem.
most of the engine power is designed to go to, the back wheels UNLESS the transfer case is in LOCK position in 4 hi or 4 low..also was the front hubs locked in...some models still use lockouts in front..remember this also.. if most of the weight is up front as it is on pickups, the rear wheels are the least resistance for the power so they will move first unless thers enough weight on top of them say sandbags or firewood or just dead weight...(if the truck is used look under the vehicle to see if the front driveshaft was taken out..some folks do this for fuel economy purposes) good luck repost findings please...thnx
If its a push button 4x4 take it to the shop its a VERY COMMON Problem dealing with the electric.Once you pay the $400 to get it fixed get rid of the truck and settle for a Jimmy/Blazer/Bravada with a floor shift 4x4..GM had problems with the push button 4x4.DONT DRIVE YOUR TRUCK IN THE MEANTIME.YOU WILL BLOW YOUR TRANSFER CASE RIGHT OUT OF IT!
Rich. There is a vacumn engagement of the front differential. The switch is on the transfer case. There will be a vacumn motor(looks like a curise control unit if you're familiar with them) under the hood with a cable running to the front diff. Make sure it functions when you engage 4wd. Probably does. If not, make sure it is getting vacumn by removing the line. It should **** on your finger when covered. If this all works properly, you could have trouble in the front diff. Don't forget the simple stuff, like CV joints, axle nuts tight, etc. You're driving an 86 so I assume you have a little experience in maintaince. Good luck. TJ
sorry lost here ,never seen one but if transmission shaft is turning to front diff then the problem is their,could be anyting from a sheared diff pinion to a broken planet wheel or possible evan a snapped half shaft or the spline on the end of the half shaft has worn and rounded off