1971 A727 3-Spd on a 383 with Edelbrock Heads and 1406 Carb

[minncharger]

I posted this in the General Q&A but thought it would be better here.....


I have searched all over for this but could not find a definitive answer.

I had a slow leak coming from the Pan on the transmission.
No visible cracks, or single source.
Seemed to be along the gasket towards the passenger side.
So I thought I would start with replacing the gasket.

Called the Chrysler Dealer to find out what ATF to use.
He was not sure. He thought Chrysler ATF+4.
Another place i read a recommendation to use

"Chrysler AQ-ATF-2848A or 2351A, available under Part Number 1843314."

Anybody know what to use?

[Plumcrazy]

ATF+4 is what you want.  It's backwards compatible.

While you're there I would also get a Mopar reusable transmission pan gasket.

[minncharger]

Thanks.

I did put in the reusable pan gasket and changed the filter.

Should I also drain the Torque converter before putting the ATF+4?

[Plumcrazy]

Thanks.

I did put in the reusable pan gasket and changed the filter.

Should I also drain the Torque converter before putting the ATF+4?

If the torque converter has a drain plug I would drain it, if not just add as much ATF+4 as needed.

[John_Kunkel]

The dealer recommends ATF+4 because that's what newer overdrive transmissions take and they don't want to stock more than one type on their shelves. "Backwards compatible" doesn't mean "best choice".

+4 is formulated for lockup clutches which most 727's don't have and overdrive gears which no 727 has. Dexron would be a better choice for a 727.