transmission swap questions
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transmission swap questions
I have an 85 iroc with a 700r4 bolted to my sb 350 and third gear has burnt up. I'm trying to divided if I want to change it to a turbo 350 or just rebuild the 700r4.the question I'm needing an answer to is will a turbo 350 Bolt right up to the 350 or do I need to change some stuff around? And what may that be . Thanks Rob
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Joined: Jul 1999
Posts: 17,271
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: transmission swap questions
Physically it will bolt right up but you also need a conversion kit. The kickdown cable isn't the same as the 700R4's TV cable. You'll need to run a manifold vacuum line down to the modulator. The transmission mount is about 2" forward. The tailshaft of the TH350 won't have a mounting point for the torque arm. Providing you use a long tailshaft TH350, the same driveshaft can be used.
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Joined: Aug 2004
Posts: 437
Likes: 84
From: Northern Arkansas
Car: 1982 MSE, 1988 S10 Blazer
Engine: 305 in both!
Transmission: 200c / Th700r4
Axle/Gears: 3:73 / 3.42
Re: transmission swap questions
Just rebuild the 700r4. It's a great trans for a daily driver and they're pretty easy to overhaul.
Joined: Dec 2005
Posts: 4,796
Likes: 16
From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: transmission swap questions
I would spend the money for a good rebuild kit from Dana at Pro-built automatics and spend the money on the 700R4. Ultimately, you'll be spending about the same.
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