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4020dt
03-30-2005 08:38:41
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Re: 4020 powershift transmission in reply to johnjmm, 03-29-2005 11:25:40
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Don't know what kind of HP you are thinking but I have been pulling a 1964 Powershift since 1984 . I have done some pump work etc and it will run 225hp . The trans must be in good shape and the system pressure set 10-15psi over the hi spec to keep everything from slipping . Also the torsional dampner must be in good shape . Mine slipped because of a rear main leak back then and I put a new one in , resurfaced the flywheel , new springs and a washer behind each spring . Slipped only once since . Set the shift valve to shift as fast as possible . One thing I will say , " DO NOT SHIFT " while pulling , find a gear you want to end up in and leave it there . In the 3000rpm 10-12,000 classes I run 4th gear , 18.4RX38 , if the track seems easy I will turn the power down a little for the 10,000 class . Also run a 4430 Powershift , run 5th 14,000 and down , over 15,000 use 4th gear . Bought it new , 6900hrs ago , shimmed up the dampner on that too , nothing else has been done to the engine or powertrain except pump , injector and turbo fine tunning .
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