Jeff's 727 rebuild thread

I have come across this symptom quite often especially after a TF-2 has been fitted. What actually is happening. With the increase in KD lever ratio, the intermediate band will certainly release slower. If the band has not fully released before the High clutch has engaged you will have an overlap situation as the transmission is in 2nd & 3rd gear for a split second. The way I have overcome this is either to fit both the small & large diameter return springs to the intermediate servo piston. This will speed up the release of the intermediate band. Or increase the number of return springs on the reverse/ high clutch piston. With a 4.2 lever you will definately need at least 12 springs. This measure will slow the application of the rev/high clutch. It is a trial & error scenario until the 2 events are in sync. In extreme cases I have tapped the rev/high clutch orifice with a 1/8 NPT thread & have several 1/8 NPT plugs with different sized holes for each one. On an overhaul I dont usually go anything above a 3.8 lever unless the transmission is being used with a FMVB or a RMVB.