Went to get a few quarts of transmission fluid and all Napa stocks is D6. Back label states its compatible with D1, D2 and D3. What happened to Dextron 4 and 5?

Is this correct for my 1997 88?

 

That is an appropriate transmission fluid for your 97 88. I believe those were designed for Dexron III.

I don't think I've ever seen a Dexron IV ATF. I know I've seen Dexron V in the past. The auto manufacturers just update fluids every so often.

Most parts stores carry universal ATF now. I suppose it works just as good as Dexron. When I was in college I recall guys rebuilding their TH350s and putting Type F ATF in it. It was supposed to be the cheap man's way of getting a fluid that worked more like Trick Shift. I just always used Dexron III. Of course, at the time I owned my 64 Olds 98 with a Slim Jim Rotohydramatic. That transmission is such a POS...

 

I understand Dexron V1 is backwards compatible with all previous Dexron transmission oils from Dexron 11 up.
To put your mind at rest why not contact the Dexron website and ask?. I have had helpful information from UK oil companies, no reason why Dexron (or whoever owns it) shouldn't help you.

Roger.

 

My questions are usually answered quickly here. My time is limited, even for internet!

 

Great. Thanks!

 

I have been using Dexron IV in my 2004R's and 4L60E with no issues. Even had a mix in my 2004R.

 

As I understand it all Dextron numbers are inter changeable. This has been discussed many times before. ... Tedd

 

Thanks for the "real life" info.

 

One thing I can tell you, run a trans low on fluid, it doesn't matter what fluid was in it.

 

I believe 4 & or 5 are synthetic