Auto Parts and Repairs

Does a 1988 Buick century limited 3.8L use the th440 transmission or is it the th125?


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2006-07-16 00:23:16
2006-07-16 00:23:16

Give your local dealership a call and ask one of the technicians, but be sure to have your VIN number handy, as they will ask for a certain portion of the number. I did exactly that myself for my 1989 Buick Century, and the technician ran my VIN to find out what type of transmission was installed at the factory.


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If it is a 3 speed automatic it is TH125/TH125C/3T40 If it is a Manual it is a Getrag F23 will average between $1400 and $2100 dollars depending on who does the work. 2. Had my 1992, 3spd automatic (TH125) transmission fixed here in Pensacola FL at Bellview Transmission Inc for $400 plus tax in 2006. Might be a bit higher now. Call and ask for Bob...

Yes, both the Iron Duke 2.5L engines and X-VIN 2.8L engines have lockup torque converters. The 2.5L engine was equiped with a TH125 transmission that had a 3 speed + lockup TCC, and the 2.8L engine was equipped with a 440T4 transmission that had a 4 speed + lockup TCC, being much stronger than the former.

You will need front wheel drive transmission. If you want a manual transmission, the most popular is the 5 speed Muncie/Getrag that came stock in the Fieros. This transmission is supposedly rated to 400 horse power. If you want an automatic, that REALLY depends on the engine as many automatics are electronic and require the engine computer to control the shifting. The most popular transmissions in this group include 4T60E, 4T65, 4T85. Non-electronic transmissions capable of running small V-8s include the stock TH125 and the 4T60 (non-"E").

-Depress and hold down metal re-adjust tab at engine end of T.V. cable. -Move slider until it stops against fitting, then release re-adjust tab. -Rotate throttle lever to its "full travel position". -The slider must move (ratchet) toward the lever when the lever is rotated to its "full travel position".

This is the plug and not the switch....The switch inself is located within the transmission. > If the car has a 3spd automatic (TH125) Look on the front (closest to the radiator) driver side of the tranny for a 4 prong plug...this is the TCC plug.... Unplug it and drive the car. If the problem goes away, then you can replace the solenoid or drive it with it WON'T HURT THE TRANNY!! You will suffer on mileage though.

1. It is a big square black plug on the side of the pan if you look from under the car it has 4 connectors. This may be where the plug is located for a 1990. > 2. PROBLEM: Engine stalls while slowing down, coughs, tries to quit,then quits, startup then stalls and dies. then start up and its ok. > This pertains to the plug location on a 1992 3.1L. This plug is visible from above after opening the hood near the radiator next to the tranny.... If the car has a 3spd automatic (TH125). How to test it...look on the front (closest to the radiator) driver side of the tranny for a 4 prong plug...this is the TCC plug....unplug it and drive the car. If the problem goes away then you can replace the solenoid or drive it with it WON'T HURT THE TRANNY!! You will suffer on mileage though. This is sometimes refered to as the Xmsn Lock out.

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