1994 audi 100s transmission problem, cumputer, no reverse AUDI VW

IIf the vehicle is front wheel drive and now Quattro than then the transmission range sensor is located inside the transmission and is part of the mechatronics unit (valve body). If the vehicle isn't Quattro then the transmission range sensor is bolted to the drivers side of the transmission where the cable connectors to the shift lever. When these range sensors go bad that will cause the flashing or solid PRND light on the cluster.

Likely the transmission has bands or clutch packs failing. Reverse is often unaffected. Have vehicle scanned and read the codes. You will likely have drive train codes in the P1700 and up range.

On the side of the transmission.

Perhaps it is in severe pain, because you failed to identify it it by make and model!

Servo or band worn out, o.ring gone hard or clutch pack burnt out.

by far the biggest expense is the front suspension,as ALL bushes WILL need replacing at 80k.cost £2400(yes pounds sterling)then the transmission,if car is hammered.£2100.BUT this is common TO ALL VW PRODUCT NOT JUST AUDI.but same could be said of MOST cars,as they all have major faults waiting to happen.(why would they build a car to last ?????

may be coupling for all wheel drive or carrier bearing

did they tow it from the fron or from the back? and is it a front wheel drive or a rear wheel drive?

Silly question: Have you checked the transmission fluid level, and is it to manufacturer's spec?

Hi I also have an Audi Auto 2.8 non quottro had a simler problom and it turneed out to be one of the gear relays that are under the stering wheel on a left ****** that is.