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Did the 940 turbo ever come with an AW-72 lockup auto trans? NMI 900

uid 6573's pic
posted by  javalion on  Sun Feb 5 07:41 CST 2006
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last visit: Wed Jul 23 09:57 CST 2014
[RELATED]

I understand there were a few lockout trannys factory mounted in US and maybe more in Canadian turbos, but more common in Europe.

http://www.brickboard.com/RWD/index.htm?id=1032781&show_all=1

Inside the torque converter there is essentially one fan at engine RPM, blowing fluid on another fan connected to the transmission, (pump, stator and turbine). With lock-up, a clutch plate in the torque converter engages thus forcing the tranny to turn at the same RPM as the engine revolutions eliminating wasted energy. Yes you are correct about the slippage. Without lock-up, increasing the engine RPM quickly, or torque, spins the engine side of the fan or pump until the turbine side catches up. On the other hand, accelerating in a tranny with lock-up forces the lock-up clutch to disengage which is a nuisance. European turbos with lock-up are equipped with a kick down inhibitor which prevents the shift out of OD at certain RPMs and speed and I assume prevents a nuisance kick out of lock–up.
--
Tom F. Three Bricks, maintain two more.






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