Lee Thompson
New Member
- Joined
- May 24, 2001
- Messages
- 3,184
I have a fully built, up to, but not including billet shafts. (Alto clutches and wide band, built pump, clearances set exactly to Chris manual) My ? is why do I have a large pressure drop on the 1-2 shift only. Let me explain. With a pressure gage installed, any throttle angle producing under 150 psi, the 1-2 shift is VERY quick and Snappy. As I increase throttle and pressure goes over 150 the shift deteriotes, and the pressure always falls back to 150 on the 1-2 shift.180 falls back to 150. 280 falls back to 150. The higher the pressure the more the shift goes away. The shift is quick @ higher psi but not as firm as @ under 150. On all other shifts pressure only drops 15-20 psi @ any throttle angle. BTW @ full TV I have 280-290 psi. Min. TV ,90 psi. Best shifting trans. I have ever seen except for the pressure drop. Have not tried another VB, did install a stock BR servo--no change. I am open to any and all suggestions. Thanks