PDA

View Full Version : 51 Commander Automatic Transmission



cloudy
04-03-2018, 08:30 PM
Could someone tell me the correct ATF to use in my 51 Commander and the capacity it takes.

rockne10
04-03-2018, 09:24 PM
Original spec was 10W motor oil. I've used Dexron-Mercon since the first time I flushed and filled decades ago.
Here's the original service spec from the Automatic Drive Owner's Guide. 71521

I've had the glovebox Owner's Guide as well as the sun visor sleeve reproduced if anyone is interested; $25 post paid.
71522

Kurt
04-03-2018, 09:42 PM
I have used Dexron in mine for years. Shifts good and no problems.

cloudy
04-03-2018, 09:46 PM
Very helpful, thanks

studegary
04-03-2018, 10:36 PM
I recommend draining the transmission and convertor (separate drains) and then refilling to the PROPER level with Dexron.

EDIT: My point being to not add to the unknown fluid now residing in it.

EDIT II: five quarts followed by three quarts followed by enough to bring it up to proper level. Be sure to follow the proper procedure when filling and checking these transmissions.

rockne10
04-04-2018, 08:57 PM
Some will recommend Type F, believing it supplies a softer shift.
Personally, I like to think that when my transmission shifts, it intended to do so. ;)

rowan
04-04-2018, 11:08 PM
I’ve always known Type F to give a stronger crisper shift.

Jerry Forrester
04-05-2018, 05:25 AM
Some will recommend Type F, believing it supplies a softer shift.
Personally, I like to think that when my transmission shifts, it intended to do so. ;)

I think you have it backwards. The type F gives you firmer shifts.

rockne10
04-05-2018, 02:48 PM
The type F gives you firmer shifts.Well the Dexron is plenty firm enough! ;)

Jerry Forrester
04-05-2018, 02:55 PM
Well the Dexron is plenty firm enough! ;)
Yeah, but if you used type F you could bark the tires when it shifts. <G>

rockne10
04-05-2018, 03:07 PM
Yeah, but if you used type F you could bark the tires when it shifts. <G>I've done that with the Dexron as well, but it requires manually running up low gear. And the old DG200 pretty consistently shifts from second to high at 72 mph.