966 TA

The MCV is on the left side just in front of the step. It's got that little plunger thing that goes up and down when you pull the TA lever.

Allen, does a hydraulic TA have an overrunning sprague clutch? I don't think so, because it doesn't "overrun" like the TA does on a 560 or 686. It holds in TA going downhill. I think it's just a planetary drive with bands and clutches.

Of course it has a sprauge, although I guess, it is called a "one-way clutch".

All that the hydraulic function serves is to lock it's over-run on de-acceleration while the T/A is in a reduction mode.

For all practicable pulling purposes however, the T/A on the low side is still just a mechanical unit and all the torque is still thru that one way clutch.

So, loss of hydraulic application (on the low side) would only show up as a loss of "engine braking" and not a loss of actual "pull".

Since this man's low T/A is intermittent, it just sounds to me like that sprauge is not grabbing as it sould all the time. Typical sprague failure.

That's the way my ol' pee brain understands it, anyway.

Allan

I'll agree, the TA unit could very well be toast, but the MCV is the first thing to check because it's a whole lot easier and cheaper to fix. It usually needs servicing when the TA goes out anyway...

Sure sounds like the one-way sprague is over-running. 'Bout the only cure for that one is a split.

If I'm wrong, someone will jump in here and slap my hands. :>)

Allan

Yepper, I think a lot of guys get the impression that the torque is thru the clutches like in an automotive application.

It would take quite a clutch pack to handle that load, I'm a thinkin'. :>)

The clutches only control function, not torque.

Allan