Having issues with the transmission but wondering if its more computer than the actual gearbox. every time I drive the car I get a different result. Sometimes it's fine. Sometimes it shifts rough and jerks. Sometimes it won't downshift through the ranges. Sometimes I get the Gearbox Fault message, sometimes I don't. Any ideas?

 

I've moved your question from General Tech Help to S-Type forum. Members here with the same model will be able to help.


Graham

 

Three questions:

1. What is your car's current mileage?

2. When was the last time you did a transmission fluid drain-and-fill, and what ATF did you use?

3. How old is your battery?

Answer these questions and you'll get more specific help here....

 

I would start with fluid level and condition plus the other suggestions shared here from Jon89

 

+1 on fluid level and list of items mentioned by Jon89.

Are there any DTCs stored in the system and is the MIL on?

The ZF 6HP26 gearbox can produce various codes or restricted performance due to misfire(s) by the engine.

 

1. @165,000
2. I haven't
3. 2 years old

 

Worth checking fuel trims to make sure it's not the engine that's upsetting the gearbox (yes it does happen). Very cheap and easy with OBD tool such as elm327.

 

Do at least an ATF drain-and-fill now. Your fluid has long since lost all of its friction modifiers and is contributing to the demise of your transmission....

 

2006 s type auto 91000 mls showing gearbox fault. when I put into drive or reverse it clunks/jerks into gear but drives normally after. two week ago I got a 2 faults abs/dsc not working. new battery fitted codes cleared gearbox fault gone until yesterday. drove down motorway was at 50mph 3000rpm wouldn't change up. initially the abs/dsc faults came up 1st my local garage said needs new wheel sensor he cleared all the faults car drove fine it was only yesterday the gearbox fault came up along with amber engine light

 

Please refrain from hijacking or tacking on to other's posts. You'll get better response by starting your own thread.

 

not hijacking anyone I thought this was a forum for help guess im im wrong in still navigating my way around this forum