If you have got a drain plug in the torque converter and your oil is that bad, I would definitely drain it as there will be another 2 litres or so of old fluid in there. The alternative is to use the car for a few weeks and then do the job again. I have done this repeat drain and refill on a couple of occasions but only because I have never had a TC drain.

Richard

 

I do the same thing. After 3 or 4 sessions the percentage of old ATF is relatively small.

Maybe not the most elegant way to switch out the old ATF, but effective enough.

Z

 

Gave up on the torque converter drain plug this morning. I need to tap out one of the pan bolts. Does anyone know the thread size? Looks like m6 x1.25 but not completely sure.

 

I can't remember offhand but I'm sure it won't be as large as 1.25. Probably 1.0.

EDIT - Just checked and the last set I bought were for an X150 ZF gearbox and they were M6 x 1.0. I'm sure that the X100 is the same.

Richard