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Old 05-26-2009, 09:45 AM
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700r4 trans. in a '86 MC SS

Changed from orignal 2004r n 305h.o drivetrain to a 350 crate and a 700r4 from an '88 caprice rebuilt w/redline parts speedo is off by 15mph. is it because of reargear difference it was right before swap? heard of a speedogear in the tranny

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Old 05-26-2009, 01:27 PM
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Quote:
Originally Posted by vango26
Changed from orignal 2004r n 305h.o drivetrain to a 350 crate and a 700r4 from an '88 caprice rebuilt w/redline parts speedo is off by 15mph. is it because of reargear difference it was right before swap? heard of a speedogear in the tranny
The difference you are seeing is because the speedometer gear ratio (inside the tranny) of the original (correct) tranny is not the same ratio as what is in the replacement tranny.

700-R4 Tranny Speedo Gear Info
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Old 06-16-2009, 02:04 PM
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