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I had a 89 Chevy 1500 4x4 with the 700R4. I replaced it with a turbo 350 from a 1979 4x4, and it actually picked up 3 more MPG. It made more power without the lock-up converter, and 4th gear. Every weekend I would pull a stockcar to the racetracks, and the transmission temp ran 20 degrees cooler with the turbo 350, vs the 700R4.

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13y ago

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