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Old 07-07-2008, 05:04 PM   #4 (permalink)
wagonman76
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Join Date: Jun 2008
Location: Northwest Lower Michigan
Posts: 1,006

Red Car - '89 Celebrity CL 4 door
Team Chevy
90 day: 36.47 mpg (US)

Winter Wagon - '89 6000 LE Wagon
90 day: 28.26 mpg (US)
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If youve got the 4T60E transmission, Im pretty sure you can change the final drive ratio by just pulling the passenger side driveaxle and removing a small cover off the trans, and then just removing a clip. However you might have to also do a computer modification or something similar or it might detect a difference in rpm and not let your TCC lock.
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