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


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-16-2002, 01:44 AM   #1
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Default Transmission Question

With my 1989 Bonneville nearing 200,000 miles i was wondering if the transmission would benefit from a tranny cooler. I know it'* a little late mileage wise but anything i can do to save this tranny would help me out as i think i'm probably much harder on the transmission than the previous owner. Alway I was wondering does the TH 440 Transmission benefit from a shift kit. I'm not hard on the car but i would like to get as much longevity out of the car as i can before replacing things. Also living in Wyoming the mountains here are another factor when dealing with this transmission. Any thoughts would be much appreciated.
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Old 09-16-2002, 07:46 AM   #2
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A tranny cooler is a good idea for any tranny, no matter what the mileage. It will help to extend the life of the tranny by keeping the fluid running a little cooler. Heat is one of your transmissions worst enemies. It'* what helps to cause it to breakdown before it'* time.

The price of a cooler is a small price to pay for a few extra years out of the tranny. I think you will find that most people here will agree. :P
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Old 09-16-2002, 12:17 PM   #3
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I already had a stock cooler on my '93, but followed the same advice on the forum, and ADDED one right in front of it. I also changed my thermostat from a 195 to a 180. Made a good 20 difference in average operating temp. Good, cheap fix for a little extra life!
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