ATF for Getrag 265/5

[Jimbo1907]

I can't locate my original thread for my Getrag transplant in my 280SL (not that I tried very hard, honestly). But I decided to get her out and drive her a bit, about two weeks ago. Interestingly, I could barely shift the transmission at all.

We had originally (and mistakenly) filled the Getrag box with transmission oil (like 85-90 I think) and it was unshiftable at all) We drained that out and put in ATF. That made it driveable, although a bit stiff. When I went to drive the car recently, it was miserable, but I got it out on the road, slowly, and warmed up the gearbox, and finally it loosened up. We decided to drain the box and refill it with synthetic ATF- I tried to get Redline, but evidently there's a shortage of Redline Dexron 6, so I got a different synthetic.

It's a significant improvement. The box still feels a little notchy, but overall it's MUCH better. I suspect that there was still some 85-90 left in the box from the first fill, even though we had warmed it up and drained it back then, and that it shifts better now because what's in there is only Dexron 6.

[mdsalemi]

Supposedly listed (Redline Dextrin 6) as in stock at Summit Racing.

[Jack the Knife]

I can't locate my original thread for my Getrag transplant in my 280SL (not that I tried very hard, honestly). But I decided to get her out and drive her a bit, about two weeks ago. Interestingly, I could barely shift the transmission at all.

We had originally (and mistakenly) filled the Getrag box with transmission oil (like 85-90 I think) and it was unshiftable at all) We drained that out and put in ATF. That made it driveable, although a bit stiff. When I went to drive the car recently, it was miserable, but I got it out on the road, slowly, and warmed up the gearbox, and finally it loosened up. We decided to drain the box and refill it with synthetic ATF- I tried to get Redline, but evidently there's a shortage of Redline Dexron 6, so I got a different synthetic.

It's a significant improvement. The box still feels a little notchy, but overall it's MUCH better. I suspect that there was still some 85-90 left in the box from the first fill, even though we had warmed it up and drained it back then, and that it shifts better now because what's in there is only Dexron 6.

How do you like your 265/5? I am waiting on a driveshaft for my 230SL to get all the pieces to work. To be clear this is the sport transmission and not the OD transmission.

[Cees Klumper]

I think you are correct, that there were, and possibly still are, remnants of the 85/90 oil in the transmission. That stuff is very sticky, compared to ATF. I would not be surprised if another drain/refill after some use cycles, will improve things further.