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-   -   02' 4.6is Supercharged / 107k / Trans. Fail. Safe (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/109525-02-4-6is-supercharged-107k-trans-fail-safe.html)

oldskool racer 01-03-2019 09:38 AM

Yeah, something about the code. I was trying to track down the codes it threw to help out, but cant find my notes. My mechanic recommended to try the harness before doing anything else, and it solved the issue! I know there are many folks on this board that are way savvier than I, just slanted to drop what worked in my instance.

RRPhil 01-03-2019 02:01 PM

Issues with the fluid temperature sensor (which is taped into the wiring loom) are not unusual but (in my opinion) would be unlikely to produce the errors reported by your ECU

https://i260.photobucket.com/albums/...pset7szos6.jpg

https://i260.photobucket.com/albums/...turesensor.jpg

https://i260.photobucket.com/albums/...pskodmr00z.jpg

The ‘incorrect ratio’ codes imply that the signals taken from the turbine and output speed sensors do not add up to one of the ratios (for 1st & 3rd gear in your case) i.e. a clutch is slipping

Phil

bcredliner 01-03-2019 02:18 PM

FYI for those new to forum. RRPHIL is our resident expert on transmissions.

740ilDuke 01-03-2019 07:05 PM

Thanks Phil. I think Im in for a rebuild for sure. Looking at re manufactured units as well, but will have to investigate as to "what comes in the box". BMW dealership sells them for $3,000

What I've dug up price wise has gone like this:
Install / Swap $ Unknown - waiting on estimate
Fluid $ Have not priced - not sure how much Ill need to buy (chime in)
Rebuild $900
L51 Reman $300
Valve Body $600

I'm thinking I'll be about $400 on swap labor from a friend putting me around $2200 before fluid. I doubt "AAMCO" or whomever will be in that ballpark. I don't want to have to worry about it after this as I plan to ride this X5 for a long time.

CleanIsFast 01-04-2019 08:31 AM

If I remember correctly that trans fluid is very expensive. Something like $20/L, my guess is over 5 liters maybe more?

I actually have brand new liter in my closet from my old 4.6iS if you want it. Send me a message, I believe my 4.8iS takes different fluid now

x5Alpine 01-06-2019 04:12 AM

I would definitely go for a remanufactured box from BMW. It is literally a brand new transmission with a 2 year warranty. Germany only has 6 of them left for the 4.6is. A tech at my dealership just installed his new trans in his 2003 4.6is S3.

bcredliner 01-06-2019 08:15 PM

I would have the one you have rebuilt at a well recommended transmission shop familiar with BMW transmissions. Better the devil you know than the devil you don't.

740ilDuke 01-07-2019 12:02 AM

Looking at all the options.

Today I got the OBD2 cable and drivers installed so I could read codes through INPA. It had a couple Bank 2 codes and transmission codes. Thinking about checking the fluid level before deep diving, but dont feel like thats the issue. Worth a shot, perhaps.

Paused on the transmission since vortech told me I should rebuild the blower. I sent them a video of it and that was their recommendation. 17 years of spinning at 107k miles, I guess it was time. $399 covers the refresh of bearings and seals. I removed it today in a little more than one hour, while it's out I'll be able to do some deep cleaning. I'll be cleaning the air filter and de-gunking the area around the supercharger and the accompanying charge pipes. Thinking about having them powdercoated while it's off.

Once the supercharger is back on, I'll be able to resume the transmission fix / search for best option.

Code wise it looks like I need some new O2 sensors and MAF sensor.

740ilDuke 01-07-2019 12:23 AM

Quote:

Originally Posted by x5Alpine (Post 1151206)
I would definitely go for a remanufactured box from BMW. It is literally a brand new transmission with a 2 year warranty. Germany only has 6 of them left for the 4.6is. A tech at my dealership just installed his new trans in his 2003 4.6is S3.

I wonder if it includes the torque converter? #doubtIT

Approaches $3700 range with the BMW dealer option. oy.

bcredliner 01-07-2019 12:52 PM

Quote:

Originally Posted by 740ilDuke (Post 1151298)
I wonder if it includes the torque converter? #doubtIT

Approaches $3700 range with the BMW dealer option. oy.

Won't include anything associated with the torque convertor unless you requested that it does. You can certainly save money with a local independent transmission shop with this issue even using some higher performance parts.


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