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+--- Thread: 722.9 Gearbox (/showthread.php?tid=6805)
722.9 Gearbox - deviance - 10-12-2015
Is it worth it to make it works?
Body can't fit on 606.
722.6 pic 722.9 pic
The best doc for 722.9
RE: 722.9 Gearbox - Tito - 10-13-2015
It looks like the 722.6 diesel bell housing / body mates with a 722.9 looking at the pic's. But the complexity of controlling the gearbox is probably the real pain.
RE: 722.9 Gearbox - deviance - 10-16-2015
Doesn't look so complicated.
RE: 722.9 Gearbox - whipplem104 - 10-16-2015
The bellhousings are not interchangeable. You would have to make an adapter plate. You cannot use the factory tcm as it has drive authorization built in like the ecus. The solenoid control is not that complicated but it is a clutch to clutch transmission and you cannot simply turn them on and off and you have to gut the tcm out of the conductor plate and get wiring into the transmission that will not leak or wick fluid up the harness.
Honestly it just is not worth the effort. If you want more gears than the 722.6 just go with a another manufacturer transmission that is easier to control. There are 6 speeds and actually bang for the buck and power handling is a 6 speed 4l80e. Tons of aftermarket support and parts and easy to control.
RE: 722.9 Gearbox - Duncansport - 10-16-2015
(10-16-2015, 08:00 AM)whipplem104 The bellhousings are not interchangeable. You would have to make an adapter plate. You cannot use the factory tcm as it has drive authorization built in like the ecus. The solenoid control is not that complicated but it is a clutch to clutch transmission and you cannot simply turn them on and off and you have to gut the tcm out of the conductor plate and get wiring into the transmission that will not leak or wick fluid up the harness.
Honestly it just is not worth the effort. If you want more gears than the 722.6 just go with a another manufacturer transmission that is easier to control. There are 6 speeds and actually bang for the buck and power handling is a 6 speed 4l80e. Tons of aftermarket support and parts and easy to control.
4L80E's are big time power hogs i thought?
Also i had seen (BBT?) using a .9 in their w201 project with the wet clutch set up. Maybe im wrong?
I don't see why you would need/want a .9 over a .6 anyways..
RE: 722.9 Gearbox - whipplem104 - 10-16-2015
The extra gears really provide a much closer ratio transmission and allow you to run a more highway friendly diff than the .6 does. Yes BBT did this with a PCS control unit but you cannot control it properly. I think for a race app and not wanting shift quality or reliability you could make it work. The tcm-2000 only has a 6 speed setup max and there wiring solution was not something I would retail ever. The correct answer is to break the factory tcu immo and then use a tcm-2600 to emulate the factory CAN messages. We do this with the 6l80e and the 6r80. And ZF transmissions and a few more. But there simply is not enough demand to justify the expense and time for the 722.9.
RE: 722.9 Gearbox - Eric78 - 10-16-2015
From what I've heard the 722.9 isn't that strong, that's why after it was introduced the v12s & higher output v8s still used the 722.6
RE: 722.9 Gearbox - erx - 10-17-2015
722.6 is built to last, 722.9 is built for better comfort and economy.
RE: 722.9 Gearbox - deviance - 10-17-2015
4l80?
I f... laught about this
https://www.youtube.com/watch?v=ozbWf_QsPrw