I have been told I need a gearbox rebuild. Car Audi A4 2002

First thought: you are low on tranny fluid. There is no dip stick. Only way is:
a) cool car (tranny fluid cold)
b) take drain plug out
c) get fluid hand pump (Autozone)
d) feed fill tube into drain hole
e) pump tranny fluid (check for your car) in until it starts running out.

Officially, tranny fluid should be 43 deg C as shown with VAGcom diagnostic. But I have good results with just room temp car (just not more).

As always: best to find someone with VAGcom (VCDS) and have him run a full diagnostic scan. It will tell you more regarding your problem.

it is slipping; you will need to rebuild or replace the transmission.

I suggest you go to the junk yard &get .a used transmission there if your short on money,but you will have to get a new torque converter(about 100 bucks).Install it yourself & you will be able to cut the cost of your repair considerably.Keep posting

Doubt it as the fault suggests you need to look into the range sensor. If similar to Renault there is a switch on the gearbox that senses where the select lever is (at the gearbox end). If the display is wrong then the sensor needs looking at and either it will need to be adjusted into a set position by moving it, or perhaps the connector to it or wiring to/from it have a fault.

I have a 2000 Audi A4 and the break wear sensor warning light come on for me too. It does not flash and is orange in color. I have asked the Audi dealer twice about it and they told me it's because the previous owner put aftermarket break pads on it, thus messing up the sensors. I don't know about the ABS warning and other than that I wish you luck on it.

Usually it Means that you are low on Oil or Coolant.

get the car code read for starters then let me have the code

hi,i'm ck .my audi c5 2.4 model 2001, when put on D while driving, it go to neutral?

If the transmission is still operating ok, you can drive it, but you need to get it checked, since a fault has been detected by the transmission computer.

Bret
RepairPal.com

Known problem with gearbox control units. High failure rate. Gearbox lights flahing. May not select reverse gear. Take to dealer as may get some goodwill on this.