Sunfire transmission repair

26Red · Apr 2, 2012

Got a '01 Pontiac sunfire that I use as a cheap commuter car. The transmission seems to be slipping. and stalling the engine at red lights. How big of job is it? Can I pull the motor and trans from the top or does it drop out the bottom?

David G · Apr 2, 2012

it is probably the lock up torque converter not unlocking. You can unplug it and use it that way if so.

Wile E · Apr 2, 2012

I thought of those cars as throw aways. Once the "car" has over 150k miles on it and something major happens, and the bill is over $1000 then it goes to the scrap yard. A friend of mine has a late 90s Stratus that is a heap, he put a new water pump on it and that was $200. 3 months later the head gasket blows. He is going to scrap it. It has almost 200k miles in it.

luv2wrench · Apr 2, 2012

Common problem for the 3T40E

Easy fix. Replace the TCC solenoid assembly. tcc solenoid locks up and stay locked up at a stop sign and stalls the engine. remove the side cover and replace the tcc solenoid assembly.

Auxiliary Valve Body Assembly

(8) Screw, Auxiliary Valve Body Cover to Auxiliary Valve Body
(41) Screw, Auxiliary Valve Body to Case Cover
(46) Screw, Auxiliary Valve Body Cover to Valve Body
(304) Pin, Valve and Spring Retaining
(310) Plug, Valve Bore
(328) Retainer, Valve Body Pipe
(330) Cover, Auxiliary Valve Body
(331) Gasket, Auxiliary Valve Body Cover
(332) Valve, Converter Clutch Control
(333) TCC Solenoid Valve Assembly
(334) Screw, Solenoid
(335) Switch, Pressure — 3rd Clutch (some models)
(337) Seal, O-Ring (Solenoid)
(338) Switch, Governor Pressure — Second Clutch (some models)
(339) Harness, Solenoid Wire
(343) Body, Auxiliary Valve
(344) Sleeve, Auxiliary Valve Body
(357) Filter, Auxiliary Valve Body
(380) Valve, Orifice Control
(381) Spring, Orifice Control Valve
(383) Clip, Wiring

luv2wrench · Apr 2, 2012

picture would not print. remove side cover and replace the tcc solenoid. lower driver side powertrain cradle.

been awhile since we did any but they use to be an everyday thing when those cars were newer and still making it to the dealer.

26Red · Apr 2, 2012

Thanks, for the help. That sounds a lot easier than pulling the whole thing. It will be great if I can keep it rolling through the summer.

David G · Apr 2, 2012

You can just leave the connector off too.

Owen Aaland · Apr 3, 2012

You can verify that the problem is the solenoid but lightly pressing on the brake pedal while cruising at highway speed. You should see an increase in engine speed as the converter clutch releases.

Sunfire transmission repair

26Red

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David G

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Wile E

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luv2wrench

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luv2wrench

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26Red

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David G

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Owen Aaland

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