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Auto Transmission BS...

 
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Old 06-18-2009, 11:37 PM
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Auto Transmission BS...

Ok. I've got a 97 Prelude with tranny issues. Trying to figure out how to diag. this thing so I can get it taken care of. It always grinded first to second, when it was hot anyway.

Well anyway, a couple days ago, it wouldn't downshift from 2nd to 1st at the stop light. Its gotten progressively worse.

When it started it would go 1 to 2 to 3. And quickly kick itself back to 2, then 3, 2, 3, 2 so on. Now it won't do that. I got no 1st, no reverse, no 3, no 4. Tiptronic mode or regular mode. I had to limp home in "2."

Right after this problem occurred, I got a check engine light that makes me a little bit suspicious. I checked it with my scanner and here's the results:

P0700
P0715
P0740

740 is for a TCU, tranny control unit. That's what kills me. Anyone got any insight so I can get this diagnosed and get the ball rolling on getting it fixed?

I'm thinking I'm gonna need a new auto trans. I can't afford a 5 spd swap as much as I'd love it. Timewise, or financially, I just can't afford it.

Furthermore, I need some pointers on where to get one too. Appreciate the help guys.
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Old 06-19-2009, 05:47 PM
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Re: Auto Transmission BS...

That sucks bro speaking from experience...its going to cost at least $1500 and thats just to replace the crap inside the trans. If there is anything else wrong with the trans it will cost more. I paid $2300 at ammco (half up front and the rest on a payment plan) and I didnt have any codes. I did get a one year warranty though. But it may be cheaper to replace it rather than fixing it. Try this... http://www.jdmenginedepot.com/jdm_pr.../Transmissions
give them a call to see if they have specifically what you need. If I would have been a little more patient I would have done the swap and it would have been cheaper but I understand your situation. Good luck on what you decide to do and keep us updated.
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Old 06-19-2009, 09:16 PM
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Re: Auto Transmission BS...

could also be a bad TCU. c'mon, the code says TCU malfunction. don't always assume the worst case scenario. do you know what those other codes are for? have you tried resetting the TCU? i don't think it will work but its one step towards knowing whats wrong. just curious, hows the condition of your tranny fluid? always go from the cheapest fix to the most expensive fix. that way you're not raping yourself of money. and you dont go swapping your tranny for no reason when it was just the TCU. not ALL the trannies for the auto preludes were bad. i'm knocking on the door of 90k. NEVER had a problem with my auto **knock on wood** so don't always assume the worst.

however, with that being said... don't ever assume its not the worst though. i'm not saying its not your tranny. just saying you should always hope for the best but prepare for the worst.
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Old 06-20-2009, 08:58 AM
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Re: Auto Transmission BS...

hope this helps....
http://preludepower.com/forums/showt...ighlight=P0740
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Old 06-20-2009, 09:42 AM
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Re: Auto Transmission BS...

Quote:
Originally Posted by Beaker View Post
i'm knocking on the door of 90k. NEVER had a problem with my auto **knock on wood** so don't always assume the worst.
Thats when mine went
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Old 06-20-2009, 10:39 AM
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Re: Auto Transmission BS...

replace the tcu and see what happens
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