68RFE low and reverse clutch is only on when the output shaft speed is below 150 RPM. So when your doing hard accelerations or burnouts and the driveshaft speed reaches 150 the clutch releases and drops back on the low and reverse sprag. The OEM type sprag will not tolerate this to many times before it will flip the drive dogs. Result is no 1st gear and 2nd gear starts. We have a replacement low and reverse sprag that has a preloaded built into it so it will not see the shock when your low and reverse clutches release. Fixed!
What can Sun Coast do for your 6.7?
We have compiled and/or manufactured the best parts and put in a kit form for easy install and optimum results for your 68RFE transmission. Our M3ga Pac Kit is proven with 500 HP. Easy to install kit comes with custom machined parts, all gaskets, clutches, seals and filters.
4C Clutch Pack
Sun Coast upgrades to 4 frictions and 4 Kolene treated steels with our custom pressure plate.
2C Clutch Pack
Sun Coast upgrades to 6 frictions and 6 Kolene treated steels with our custom aluminum piston.
OD Clutch Pack
Sun Coast upgrades to 7 single sided frictions and 7 single sided steels with our custom pressure plate.
UD Clutch Pack
Sun Coast upgrades to 6 single sided frictions and 6 single sided steels with our custom pressure plate, new UD piston and UD piston retainer.
Reverse Clutch Pack
Sun Coast comes with 2 frictions and our upgraded 1 Kolene treated steel.
Low/Rev Clutch Pack
Sun Coast comes with 6 frictions and 6 steels.
68 Accumulator Kit
Reduces reverse to drive harsh engagement, gets you firmer quicker shifts. Kit includes heavy duty custom accumulator cover and five new custom billet accumulator with improved seals. Wouldn't shift like this till now!
Paper/Rubber and Seals
Contains all the gasket and seal to do a complete overhaul, kit includes a OEM pump plate cover, new spin on and sump filter.