auto box has no kickdown
 

Hi
I put an automatic transmission in my manual w126, which started life as a 560 until someone converted it to a diesel, OM606.

The gearbox was taken from a W140 american model. All i know is that it is a five speed.

The operation went well and the car drives ok, except for the fact when i approach hills and the car is in 5th gear. I have to manually drop the shifter down to "3" and then get the umph.

Of course,im pretty sure i don't have the correct automatic shifter, as it should be P-R-N-4-3-2 right?

But more importantly, there is a "linkeage" which my mecanic could not find which he says, when fitted, will give me the kickdown from the accelerator.

If anyone can help me with a picture or a link, so i can start the search of junkyards, i'd be very grateful.

And what should be the correct shifter? Can i fit another one from the top without taking out the entire transmission?

thanks for your patience and advice.


Best


MJ in Morocco

the 722.5 nor 722.6-both are 5 speeds-was never installed in a 126. doubt you will find a bolt on solution. but maybe a 140 with a 606 would help-maybe.

BB:
The transmission is almost certainly a 722.5xx.
Kickdown is accomplished electrically; there is a solenoid valve on the transmission, and a switch under the throttle pedal. If the car was originally a 560 the switch may still be there, and perhaps the wiring also.

thanks so much for that. Where exactly do you think the solonoid is on the box?

The 5th gear solenoid is on the valvebody itself and it is controlled by an HGS module - did your conversion guy install that too?

usually you lose 4th gear in these, and the box shifts from 3 to 5.

God i hope not.

No, i guess he didn't fit this when he did the conversion. Annoyingly, also, i have a gear lever from a 280 so it only shows 3 and 2. Im guessing fitting the one with P R N D 4 3 2 1 won't be so difficult, right?

best
MJ