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99LeCouch · 03-31-2011, 09:36 PM

The old-style 4T65's need to get to 47-48 mph to shift into 4th with TCC lockup. My RPM's go from 1800 RPM to 1200 RPM at 48 mph.

The fuel pump is about $200 with the sender included. Even dropping the tank with labor shouldn't be more than $600 or so.

And, getting the 3800 into 4th at 50-55 mph is about the most efficient way to drive these cars. I don't see a lot of difference between 50 and 55 mph on my ScanGauge.

For those 3800 V6-equipped cars, get a ScanGauge or an UltraGauge. It's the best way to wring the absolute utmost fuel economy from these cars.

03-31-2011, 09:36 PM	#35 (permalink)
99LeCouch Driving the TurboWeasel Join Date: Mar 2009 Location: Steuben County, NY Posts: 459 Thanks: 14 Thanked 18 Times in 17 Posts	The old-style 4T65's need to get to 47-48 mph to shift into 4th with TCC lockup. My RPM's go from 1800 RPM to 1200 RPM at 48 mph. The fuel pump is about $200 with the sender included. Even dropping the tank with labor shouldn't be more than $600 or so. And, getting the 3800 into 4th at 50-55 mph is about the most efficient way to drive these cars. I don't see a lot of difference between 50 and 55 mph on my ScanGauge. For those 3800 V6-equipped cars, get a ScanGauge or an UltraGauge. It's the best way to wring the absolute utmost fuel economy from these cars. __________________ 2012 Chevrolet Cruze Eco 6MT