I have a 94 GMC Suburban with 163,771 miles on it. This week I noticed that the car will shift into reverse but will not move. At take off the RMP's jump up to 3 and 4 but the car does not accelerate and feels like its pulling
I have a 94 GMC Suburban with 163,771 miles on it. Won't Move in Reverse?
- Thread starter jay
- Start date
Jesse Gallagher
New member
- Joined
- Jan 13, 2011
- Messages
- 1
- Reaction score
- 0
- Points
- 0
need more detail , with what you have givin us could be a number of things but transmission does sound like transmission is on its last legs, if its manual check clutchh for fluid and maybe its just time to replace clutch(if manual) because when my clutch was on its way out i would be driving along and if i accelerate to much RMP's would jump but car wouldnt go any quicker , somthing is slipping weather it be your transmission or if manual your clutch
dare i assume it has fluid? full and clean
loseing reverse is first sigh of death for trannys...usually the torque converter,,,800 dollars [non dealer]..the way it goes is as long as its appart,,do the whole rebuild...about 1600 to 2200
loseing reverse is first sigh of death for trannys...usually the torque converter,,,800 dollars [non dealer]..the way it goes is as long as its appart,,do the whole rebuild...about 1600 to 2200
Sounds like the tranny is dead. I'd look into a factory remanufactured or a reman from a major parts store. Unless you know very well of a great transmission shop, you can get taken very easily on a rebuild. A lot of trans. shops think they know how to do it, but don't.
Molson02536
New member
Put a line pressure gauge (or visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure. Base pressure at idle in P,N,OD should be around 70psi and around 140psi in R. Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, trans or pump is worn out. If max pressure is low, check EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve with a Transgo 0.500" boost valve (easy fix in pan).
A slow, slipping or no reverse could be “lo-reverse” clutches are worn out, fluid leak in the reverse apply circuit, or broken sunshell.
It is possible to remedy a fluid problem by removing the check ball from its cage in the case in the rear of the trans may help (must remove valve body), or adding a high-viscosity additive such as Lucas Transmission additive or other seal restorer product. May also have worn boost valve (can replace in the pan).
Good luck and keep us posted.
