1983 Toronado Transaxle
#3
The GMC motorhome community is probably a better source for different final drive gears, but be sitting down when you ask about the prices. Those RVs used the older TH425 transaxle. I don't know how the TH325 gears compare. There is also an aftermarket limited slip differential. The manufacturer thinks very highly of it.
#5
They actually made quite few different ratios for 83. I have a list at home. Will try to take a picture of it tonight. I have actually seen NOS ones on e-bay but they were very pricy.
#6
RPO F47 2.73:1
RPO F45 2.93:1
RPO F57 3.15:1
RPO FW4 3.36:1
#8
Thank Bill
Called up advanced automotive group. He said maybe but he needs drawings of the ring and pinion. They are a CNC machine shop. I tried advanced automotive machine but no one there, try again later.
Called up advanced automotive group. He said maybe but he needs drawings of the ring and pinion. They are a CNC machine shop. I tried advanced automotive machine but no one there, try again later.
#10
I sought out this info years ago.
According to the Rivi peeps from the Turbo Buick sites :
3.36's were supposed to be stock on the 83/84 turbo Rivs with the 85 turbo Rivs getting 3.15's.
3.15's should also be in the 4.1 Eldo & Seville 82-85 which should be easier to find.
Its a shame these or even steeper gears weren't more readily available.
A stock tire height E-Body loses some of the benefit of a better gear vs a stock tire height A/G body.
I always believed the 3.73's in the VIN 9 307 Hurst/442s had much more of an effect on acceleration than the different torque converter - carb - distributor & the "Y" pipe dual outlets did.
There's a twisted part of me that would love to see a regular Y 307 Cutlass with nothing more than 3.73's go up against a VIN 9 Cutlai just for gits & shiggles.
According to the Rivi peeps from the Turbo Buick sites :
3.36's were supposed to be stock on the 83/84 turbo Rivs with the 85 turbo Rivs getting 3.15's.
3.15's should also be in the 4.1 Eldo & Seville 82-85 which should be easier to find.
Its a shame these or even steeper gears weren't more readily available.
A stock tire height E-Body loses some of the benefit of a better gear vs a stock tire height A/G body.
I always believed the 3.73's in the VIN 9 307 Hurst/442s had much more of an effect on acceleration than the different torque converter - carb - distributor & the "Y" pipe dual outlets did.
There's a twisted part of me that would love to see a regular Y 307 Cutlass with nothing more than 3.73's go up against a VIN 9 Cutlai just for gits & shiggles.
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