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I can't answer your question, but I think that would largely depend on what converter you have, what the stall is set up to, and how much load is on the motor at any given time (more load = more slippage). Someone might have some information about a stock powered truck with a stock trans though.

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9 hours ago, kzimmer said:

No lockup in a 1st gen.

 

Depends. 

 

TorqueFlite 727 transmission No, Its a 3 speed with no lock up. This was renamed to 37RH

 

There was a 4 speed with lock up. A518 model. Which this came to be renamed 46RE later in life.

 

Then the 47RE came out in 1994. This was called A618 transmission (old name).

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It was a 4 speed (727 with an OD housing added on) but didn't have lockup until 1994 when it was renamed to the A518/46RH. At least not in the diesels.

Edited by kzimmer
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