I was wondering...my transmission is low on fluid due to changing some lines and things of that nature.

At home yesterday I had a quart that is labeled ATF 4 (or something along those lines) that says it is for Dodge, Chrysler, etc. Makes sense to me, the wife owns a Chrysler.

Is there much difference between one type of transmission fluid and another?

Is there some specific type I should go out and get to fill up mine?

I have a C4 for reference.

 

ATF Type F (Stands for Ford) is what the older Ford non-OD trannys require. If you cannot find it, Mercron/Dextron should be fine. I believe they are backwards compatible with Type F. Google search just to be sure. I have no idea if your current Dodge ATF will work or not.

 

you dont want to mix and match its bad for the tran. Use the Type f or the dex/ merc.

 

Definitely don't use the ATF +4. It's a synthetic designed for Mopar stuff only.

Use Type F or Type FA (which works for Type F and Type A). It's a high-friction ATF that allows the shifting clutches to lock and unlock quickly. DexIII/Mercon has friction modifiers that make for smoother (ie. 'more comfortable') but slower/sloppier shifts. It won't ruin the tranny, but it may not shift properly with it. Conversely, I've heard that running Type F in a GM may tighten up the shifts.