AW-70L Manual Shifting
Good day.
Been some time since posting, and had what could be considered a "performance oriented" question for the community. I have the possibility of laying hands on an immaculate 1990 740 which has the stock AW-70L (Toyota A42DL?) transmission. By the specs, this transmission unit features completely hydraulic shift actuation, with the exception of an overdrive solenoid for 3>4 transition. I am one of those curious folk who appreciates "walking" my automatics through the gears manually; directly removing all load from the clutches on each upshift. There's a little dance with the stick, throttle, and winter switch which I use on our 95 960 to achieve this; and the results are quite good: Less wear, lower temps, better power control across the board. I can also selectively skip granny and just lock in 2nd for less hassle in slow traffic. The 70L would seem to be a bit of a challenge with regard to any such usages as traditionally implemented. However, I could adapt well enough if there is a modification which might be known to allow for simple, exclusive manual shifting of this unit. All automatic gear-change functionality (apart from converter lock-up) could be eliminated to achieve this end: I wouldn't miss it one bit. As a "quick fix" I have considered disconnecting the kick-down cable and locking it into a "closed throttle" position to allow better overriding manual control of upshift points. However, I have some concern about also reducing final lockup pressure on the clutch packs by doing this, resulting in slippage after final engagement. I might be wrong here, perhaps someone could shed some light on this type of scenario, too. In sum, I would appreciate knowing:
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