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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 06-18-2007, 07:28 PM   #1
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Hey guys, long story short I dummied the tranny in my 89 Bonne SE. Shifting from 1-2 at WOT is incredibly rough, shifting from 2-3 is brutal at as well. Gonna cost me $1900 CAD to get it repaired, which isnt worth it in my opinion. However Ive sourced out a 4T60 from the local highschool from a 1990 Delta 88.

Few questions here, the 4T60 and 440-T4 are the same, are they not? Just different names.. How can I verify that the 4T60 out of the 88 isnt the electronically controlled one, and if it just so happens that it is, how much more to the swap will I need in order for it to work?

Thanks guys
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Old 06-19-2007, 05:30 AM   #2
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440-T4 and 4T60 are the same thing. I believe they switched to an electronic tranny in 91 when olds went */C.
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Old 06-19-2007, 07:10 AM   #3
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What'* the final drive ratio of both trannies?
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Old 06-21-2007, 02:56 AM   #4
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Quote:
Originally Posted by willwren
What'* the final drive ratio of both trannies?
Dunno :/
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Old 06-21-2007, 11:07 AM   #5
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Check the RPO list on the spare tire cover in the trunk. The ratio code wil be on there. Theres a list in techinfo I believe.
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