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TXGOOD
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FEB 27, 03:47 PM
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For those of you who have done a 4.9 swap which of the transmissions below did you use.
I know next to nothing about these transmissions.
1992 Cadillac DeVille (1980 Up)
Transmission
AT, FWD, coachbuilder (opt R1P)
AT, FWD, w/o coachbuilder; traction control (opt NW9), 2.73 ratio (opt FP3)
AT, FWD, w/o coachbuilder; traction control (opt NW9), 2.97 ratio (opt F79)
AT, FWD, w/o coachbuilder; w/o traction control
Submit
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olejoedad
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FEB 27, 05:19 PM
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Seville transmission with 35/35 sprockets and 3.33 differential. [This message has been edited by olejoedad (edited 02-27-2019).]
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TXGOOD
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FEB 28, 09:44 AM
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theogre
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FEB 28, 11:08 AM
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Most V8 have heavier trans... 4T65(E or not) etc. Is close to same as 4T60 but w/ heavier clutches etc.
Gearing for most of 4Txx should be same as listed in
See my Cave, Gear Ratio------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
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TXGOOD
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FEB 28, 02:01 PM
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Thanks theorgre that helps a lot.
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theogre
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FEB 28, 04:17 PM
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Note that Auto Trans need 2 RPO to tell What Trans and What gearing. Above you only have a couple RPO for gearing and seem not Trans type like ME9 for non E 4T60.
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Raydar
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FEB 28, 04:38 PM
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All 4.9s came with the 4T60E. NOT the 4T65.
Mine had the 2.97 FDR. I forget the code.
I pulled it out and swapped in a 5 speed. (New Venture T-550, aka "Cavalier Getrag.")
You will probably be happier with the 4T60E from an Eldorado, or maybe a Seville. As already posted, it comes with the 35/35 sprocket ratio and the 3.33 FDR.
If mine had been equipped like that, I may have kept it, instead of swapping in the 5 speed.
In case you are wondering, changing the 2.97 to 3.33 is not as easy as you would like. Many times you can just change the gears, which is (relatively) easy to do. In this case, you'll have to change the sprockets and chain in the trans, from 37/33 to 35/35. You have to remove the whole valve body to get to those.[This message has been edited by Raydar (edited 03-02-2019).]
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