Transmission temp too high?..

[TwinTurboGTR]

Originally Posted by turquise1

Hey guys,

Firstly, these guys have been working with BMWs for a while, so I kinda hard to believe that they would use a wrong fluid in so many of them and get away with it.

That means nothing. Some BMW dealerships use genaric fluid. The one by my house for example uses Redline D4 and not OE. Why? I don't know. They have 55 gal drums full of D4 and thats what they use. So being it is an indy, the likely hood they did not use ZF fluid or BMW OE is there. Am I questioning their ability, absolutely not, just putting it out there.

Also, there is no burning smell, but another transmission place that I went to told me that it was burnt after a brief check up.

The transmission was opened up again after the rebuild because the transmission guy wanted to make sure that everything was ok. He said he did all the tests including pressure tests and no problems with clutches. This was done two months ago so, I cannot believe the clutches are gone already.

The car drives fine until it heats up and this problem happens when I am at a stop and try to move again. Once the TRANS FAIL SAFE happens, I can turn the engine off/on and everything is ok again for a while.

The only thing that the tranmission guy did NOT do well was to replace my valve body with a new one but a rebuilt one, so I still question that..

Transmission module come up with stall speed and gear check errors everytime, but thats it..

I can drive the car in manual mode without problems btw..

Thanks for the great input..

Ozzie..

After reading, I mean listen. I am not knocking the ability of your tranny guy or how good he is. I am sure he is very good at what he does but if he was so good, then why go to another tranny shop? Unless it was for a second opinion or you were stranded and that was the closest shop to you when you were on the road.

As for opening it up again just to see if everything is ok is really unusual. I mean if I owned a shop, I wouldn't dedicate hours of labor just to see if everything was ok. If there was a problem, then I would look into it, but just to have a customer come back for me to open up their tranny to see if things were ok seems a bit... wierd.

The X should drive fine at start up, because the fluid is thick and cold. Once the fluid warms up, it becomes thinner. Thats why Slick and I are suggesting the fluid may be wrong. Depending on the viscosity of the fluid, if it is too thin at operating temps, the clutches are going to slip, cause heat burn themselves out.

If he didn't do the valve body well, after he cracked it open a second time, why didn't you ask for him to replace it with a new one or another rebuilt one?

Also, after the tranny was done, did he reset the adaptation values?

That was one question I forgot to ask.

Again, do not take anything I saw above as me attacking your Mechanic. Again, I am sure he is very confidant and it is good that you trust him so well to back him up. I would just ask some more questions. Open ended questions. Such as with the fluid, don't ask, "Did you use BMW or ZF fluid? Ask, "Which fluid did you use, BMW OE/ZF or something else? If the answer is fuzzy or not BMW OE or ZF, then your problem starts there. Lets say you replace the fluid with ZF or BMW OE and it still doesn't fix the problem (Atleast the RIGHT fluid is in there so you don't have to go back right as the warranty on the tranny expires and find out a different fluid was used.)

I hope that makes some sort of sense in the mess I wrote.