Tell your "Trans Guy" that the Full Throttle Shift Point is controlled by the Govenor. Adjusting the Modulator will only change the Part throttle Shift Point by 3-4 MPH. The 428CJ and 429CJ C6's both used the same special govenor which created a higher than stock full throttle shift point, than the regular C6 govenor. As you can guess, this special govenor is a very hard part to locate. Stiffer springs can be put in the stock Govenor, to make it shift at a higher RPM, but it is a lot of work, and a lot of trial and error to get the correct springs/ shift point. The govenor uses two valves, which move outward by the centrifical force caused by the Gov spinning on the ouput shaft of the C6. The springs oppose this outward movement of the valves. So by using stiffer springs, or lightening the valves, you delay the rpm that the valves move to their full travel. It's an awfull lot of work..Maybe B&M Transmissions can help with this... They may have/ know just the correct springs to use?
Posted on Jun 6, 1999, 12:04 AM from IP address 206.173.21.147