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Old 09-25-2007, 02:19 AM
BMM BMM is offline
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Lock up?

Hello. Im shopping for a new transmission, and I've come across "Lock Up or Non-Lock Up". What exactly is this? My understanding is lockup is better on fuel, becuase of less slippage on the highway?

1988 Cutlass Supreme with the factory 200-4r transmission. Would that be lock up, or no? And Does the converter dictate lockup, or the transmission?


Thank you.

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Old 09-25-2007, 04:34 AM
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The 200-R4 uses a lockup converter, and yes the lockup will reduce slippage when engaged. You will see about 200 to 300 fewer rpms when locked.
A non lockup converter can be used, but I don't recall if modifications to the trans has to be done to run it. One of the trans experts will be able to tell you.
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Old 09-25-2007, 10:08 PM
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Thank you. So, Ill definently go for Lock Up I guess.
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