Zf Transmission Trouble Codes

[boost69]

Guys,

I took the BF Mark II XR6T for a drive the other week, and gave it a few hits to see how it performs as I recently got it custom tuned, and

the car went into limp mode, with two errors coming up;

Code: U0100 - Lost Communication with the PCM

Code: P0732 - Transmission Gear #2 Incorrect Ratio

At this point the error has not returned and has only occured once.(though admitedly the old man drives this car mostly, so it really doesnt get pushed that much)

I have rung a few tranny places, and most say that the tranny is on the the way out, (in their experience, once you get the incorrect ratio error codes the tranny is gone) and I have gotten quotes from 3 - 5.5K for a standard rebuild. (not sure why there's such a large variance...they all say pretty much everything wearable is changed, appart from the mechatronics)

Other tranny places aren't that quick to diagnose, and tell you it could be allot of reasons why it's pulling that code...

One tranny place told me the mechatronics unit can correct the error up to a point, so the car will drive ok for a while, but it's only a matter of time before it can't correct it anymore and then you have to overhaul it.

Most tranny places know about the error, and might give you a vague explanation of what it is...supposedly low pressure and slippage, but they haven't really told me what cuases it, appart form saying it will need a an overhaul.

If I have to overhaul it, then so be it, but I just wouldn't mind some advice from someone with know how, to confirm potential causes and solutions before I go ahead and spend all this money overhauling it...

Anyone copped one of these errors?

[Ralph Wiggum]

First code is from the flashing process when the PCM stops talking to the TCM.

The second code is likely to do with a slipping second gear, but I'd wait for it to become constant or generate a noticeable symptom before condemning the box.

[boost69]

Thanks for the advice "Ralph", I appreciate it...

[barnz]

Its possible for sh*te to get stuck on the shaft sensors and throw codes like that, though the fact its only throwing a code for one gear could suggest its slipping as Wiggum said...

[joe@cms]

make sure that the pins in the ZF harnes going into the mechatronics havent vibrated out or a bad conection, have found many BF's due to age that have given of simialr codes, a good place to start with...... failing that return the box back to stock & see if the codes come back ??

joe

[boost69]

Thanks for the advice Joe, the car has done nearly 240,000KMS, so that's why I assumed it might just be a wear and tear issue, but if your experience tells you that the connectors can come loose with age, then I guess I will get it checked out, to eliminate the obvious, and certainly the cheapest option...

Out of curiosity if I did get the car custom tuned, would the tuner have mucked around with the Mechatronics setting too?

I just assumed that a tuner would just play with the engine managment system...is it normal practice for the tuner to play around with the ZF, while custome tuning your car?

[joe@cms]

you need to ask your tuner if he has ?? but insaying that there are trans tables for a BF that are available in the tune file without touching the ZF tables... but one effects the other !!.... with 240,000 kms with more power I'd say your probally right about the wear..

joe