Reverse won't work on my 1994 GMC Surburban 4x4. Only 90K miles, truck is in great shape otherwise. All other gears work fine. Tranny fluid looks and smell fine, it was changed in the last 12K miles.

Do you have a code number? otherwise more commonly found when you have just reverse is a cracked cage in the transmission,the good thing is it is a cheap fix.

Check shift cable assembly on transmission for proper operation. If cable is working properly, suspect internal transmission problem

Time to rebuild.


Mai

You probably have the same problem i just repaired on my surburban. It had 190000 and I lost reverse also. so you may have a reverse sun shell problem. This was common on the 4l60e transmission and when the part wears out you have to have the transmission rebuilt or replaced with a Re-manufactured transmission. Without more information then this is what I can offer.

sounds like you have other problems like low /reverse clutches

this has a serpintine 1 peice belt that has a single belt tensioner with a square drive in it you simply push tensioner against spring pressur and carfully hold and slip belt off 1 pulley then slowly let tensioner back to its stop,there should be a belt routong diagram on fan shroud or simply draw a picture of pulleys and belt routing before removal,then reverse procedure quite simple acully

check linkage and fluid

The late shifting could be a control problem but the no reverse is not. These trans had a habit of stripping out the reverse sun shell, the metal from it may have gotten into the valve body causing the late shifting, but it really does not matter. If you have forward movement, but no reverse it has to come out. Sorry dude. You need a trans.

Check ground wire connection from rear light harness connected underneath body in the rear.Sometimes the bolt that grounds the wire to the body of the truck corrodes

sounds like you need the gearbox looked at.... the adjuster pulleys in the in the gearbox are loose.. hope this helps