TCC - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-18-2006, 01:12 AM   #1
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Default TCC

I'm guessing it'* the TCC, but idk, wanted to know what the experts thought .
My tranny is acting very oddly right now. When I shift down, I loose a lot of power, but when I shift up, it'* fine.
For Example:
Driving on the highway, I shift down to pass, it shifts fine, but I don't have as much power as I would if I was in the gear to begin with.
Another example:
Accelerating hard, shifting into second, third, fourth, there'* no problem

BTW, how exactly do you change the TCC?
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Old 11-18-2006, 02:06 AM   #2
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bump
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Old 11-18-2006, 02:16 AM   #3
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Well from what I know, I changed one on a Grand Marquis...but these aren't exactly RWD. On that one, it obviously was not electronic, so it was just sitting on the input shaft of the trans and slipped right off. So I guess the hardest part would be getting the trans out. and unbolted from the engine. I do believe you can get a TCC from Advance.

This is ONLY personal experience with a different trans. Only an opinion, not fact.

Good Luck.
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Old 11-18-2006, 09:20 AM   #4
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Am I understanding that you get TCC engage at sustained cruising speeds, but when attempting to pass TCC does not disengage after transmission downshitfs?
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Old 11-18-2006, 12:42 PM   #5
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Or is it rpm related? At higher rpm'* you lose power? If so, get that Cat tested.

Otherwise, get a scantool on the car. Watch the shifts and the TC slip RPM'*. No check engine light? What'* the fluid look and smell like WARM (after a drive)?
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Old 11-18-2006, 12:47 PM   #6
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The SES light has been flashing on me periodically, but not after it slips. I attributed that to my LIM gaskets (running rich).
And no, it'* actually at low RPMs
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Old 11-18-2006, 12:50 PM   #7
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Let'* get a code before we go any further. If you don't get one, get a scantool on it and pull the history codes.
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Old 11-18-2006, 12:54 PM   #8
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Yeah, I was gonna stop over at Intense to get the code, but I guess they're closed on weekends
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Old 11-18-2006, 12:58 PM   #9
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They may not be able to scan your OBD1.
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Old 11-19-2006, 01:14 AM   #10
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hmm, I might just try to get it scanned at the dealer, idk...
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