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  #1  
Old 02-20-2022, 09:22 PM
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Transmission issue on 2004 m54b30 e53

Bought another 500 dollar e53. Very clean, runs really well. Transmission goes into gear but no forward or reverse. There are no codes. I used inpa, ista and pa soft. So I'm stumped.

I bought this for the interior, but if I'm able to get it going I can sell it.
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Old 02-20-2022, 11:07 PM
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"going into gear" strongly implies fwd or rev.

Do you get indicator on dash and console of requested gear?

Also if so you should be able to confirm with scanner the "L" pins
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Old 02-20-2022, 11:31 PM
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Could be broken Tcase splines...but yeah. Need more pertinent information.
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Old 02-21-2022, 12:01 AM
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04 should be x-drive. If you get driveline noise no motion it can be an axle popped out of the dif. That comes up twice a year on xoutpost.

If rear comes out park will not work and car will roll.


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Old 02-21-2022, 01:35 AM
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Quote:
Originally Posted by andrewwynn View Post
"going into gear" strongly implies fwd or rev.

Do you get indicator on dash and console of requested gear?

Also if so you should be able to confirm with scanner the "L" pins
Dash indicator shows drive, reverse, sport and manual modes. Whatever I put it into with the lever it registers. Just no movement.

Guy I bought it from says he was driving it home from work and the trans failsafe message came on. He just coasted to the side of the road.

He said there was nothing to indicate there was any issue with the transmission. No clunking into gears, hard shifting or missed gears. No weird noises or burnt trans fluid smells.

Odd thing is there was no trans failsafe mode lit when I picked it up. On my other one I got back in September it had trans failsafe mode lit up and I was limited to 4th gear only. That one was an easy fix though.

Anyway, I'm going to diagnose more with insta later as well as check fluid level. It's all dry underneath though. Not even any motor oil leaks. Weird..... that there are no leaks. Lol
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Old 02-21-2022, 01:41 AM
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Originally Posted by RocketyMan View Post
Could be broken Tcase splines...but yeah. Need more pertinent information.
I wish I had codes. Right now I've got nothing. I will have to do some more physical inspection and see what I can find. I'll troubleshoot with ista more as well.

Broken t case splines would be noisy when trying to engage the transmission wouldn't it?

There's no noise at all when moving the selector lever into drive or reverse.
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Old 02-21-2022, 01:43 AM
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Originally Posted by andrewwynn View Post
04 should be x-drive. If you get driveline noise no motion it can be an axle popped out of the dif. That comes up twice a year on xoutpost.

If rear comes out park will not work and car will roll.


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Nope. It goes into park and doesn't budge.
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Old 02-21-2022, 04:49 AM
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Rolls in neutral?


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Old 02-21-2022, 06:04 AM
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Rest codes (even if not present) and reset adaptations while in neutral then try putting it into gear and driving (keep Foxwell NT-510 hooked up) then watch live data and see if your dash and actual transmission gearbox show the same settings, if not repeat but shut off when done and put into park and let it go to sleep. Upon restart check live data as before and if it works all good but if it is working even with gear position errors it is your mechatronics unit in the transmission.

The above steps are for when you aren't getting anything after trying reset in PARK.....

PS. It won't hurt anything to reset your TC oil wear while you're at it just to see, but don't forget to change your TC oil later.

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Old 02-21-2022, 12:21 PM
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Quote:
Originally Posted by TheFixer View Post
I wish I had codes. Right now I've got nothing. I will have to do some more physical inspection and see what I can find. I'll troubleshoot with ista more as well.

Broken t case splines would be noisy when trying to engage the transmission wouldn't it?

There's no noise at all when moving the selector lever into drive or reverse.
When my splines broke in mine, it was a very faint noise. This was because the splines got rolled over so much that nothing was making contact. But yeah, it should be making some sort of noise most likely.

Have you tried jacking up the vehicle on all 4's and inspecting the driveline n such and spinning the wheels by hand?
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