I just changed the fluid and filter in the 81 SD and then took it to California where it decided (only after a hard freeway run) to stop using 1st gear unless I am really kind to the throttle.

Reverse does not engage very well either as it takes about two seconds to engage and then if you hit it hard it slips. After picking up speed in reverse when you back off the throttle it just freewheels until you use the brakes to slow it down.

Now in first from a light when it is really hot after the run it will engage 1st enough to get to 2nd then you cna punch it but I almost got crushed th first time as I was pulling in front of someone... go fiure.

After the car sits for maybe 10 minutes then 1st works like normal so I don't think I'm toast yet just getting there. I think I'll try the transX treatment first but if that doesn't do it then your solution is the one I'll need to persue.

Thanks for the writeup.

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'99 S420 - Mommies
'72 280SE 4.5 - looking to breathe life into it
'84 300SD Grey - Sold
'85 300SD Silver - Sold
'78 Ski Nautique