Quote:
Originally Posted by Big Dave
The GV overdrive is a single planetary spur gear setup. Expect a 3% loss in driveline efficiency, but this will be more than offset by the lower engine RPM resulting in lower engine frictional HP.
What concerns me about t_vago's setup is reduced cooling in the automatic transmission due to the big overdrive ratio.
I had a GV on a 1983 GMC K2500 with a TH400 tranny and the wimpy old 6.2 engine. I destroyed not one but two TH400s in front of the GV. Once I raked up the parts from the Interstate, I took them to a transmission guy and he said excessive heat buildup.
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I would think synthetics and a huge by large trans cooler with a fan would help with that, but you are talking more about pump speed, correct?