My O/D is slow to engage on warmer days. I have no idea when the fluid was last changed, or indeed, what type they used. So, I'm going to drain it and refill with ATF type F.

My questions:
(1) Can I do this with the front end up on ramps, or must the car be level? I'm reluctant to get under the car on 4 jackstands, because my driveway isn't level.

(2) What are the filler/drain bolt sizes for the earlier transmissions with the larger heads? I'm going to get a six point socket rather than risk rounding the heads off.

Thanks in advance,
Tim