The 700R4 3/4 clutch pack usually burns up, as a direct result of a few different problems, all of which are not addressed by most technicians. In addition, to make the transmission shift harder into second gear, they change to a Corvette servo piston, which has more apply serface area. To "fix" this problem, many rebuilders add an "Alto" kit (or another brand of clutch pack, that are thinner, providing room for more clutches), and drill out the apply hole (which makes the clutch pack apply more quickly). For example, the 700R4 transmission has a nasty habit of burning the 3/4 clutches. Some transmissions do have shift quality problems that need to be dealt with. This shed some light:īy Example: The 700R4, and Why I Do Not Recommend Shiftkits in 700's. I'm trying to find out the perfect "shifting" set-up for the awd.
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