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4T60 has no upshifts
Posted to Transmission Forum on 7/11/2010 3 Replies

Hi,

The above transaxle in an 1990 Olds 88 has extremely delayed upshifts,like 50 mph and 5500 rpm for the 1-2 shift. I have noted that the tv cable goes slack when the car is running, but retains proper feel and operation when off. The fluid was originally ... Login to read more.

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