HOW TO FLUSH TRANSMISSION COOLER IN RADIATOR - 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 02-23-2007, 10:55 PM   #1
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Default HOW TO FLUSH TRANSMISSION COOLER IN RADIATOR

I'm replacing my engine / trans ... I read some of the post on how to do the replacement but I'm unsure as to the best way to flush out the old trans fluid from the radiator. I will be removing the radiator while replacing the motor so could someone please tell me the best way to clear out any old trans fluid from it before I install my new unit.
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Old 02-23-2007, 11:15 PM   #2
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Gravity will do it. It'* just a vertical tube in one side of the radiator. Simply disconnect the lines and let it drip. Blow it out with compressed air if you want.
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Old 02-24-2007, 01:11 AM   #3
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You can buy an aerosol flush for tranny coolers. I used compressed air first, then the flush, then air again. I had to cut the fitting off the vinyl hose that came attached to the can and enlarge it with a conical piece of metal so that it would slip over the flared end of tubing. This is mentioned with other trans prep items in this thread: http://www.bonnevilleclub.com/forum/...ic.php?t=29367
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