Proper fluid for 700r4

[patmckinneyracing]

What is the proper type of fluid for the 700r4 between Dexmerc III and Dexmerc VI? Autozone told me that Dexmerc VI is the proper fluid, not that I trust Autozone guys too much. But after reading some posts on diesel and other forums, a lot of people are running Dexmerc III. So what is the proper fluid to be using in the 700r4?

Since Dexmerc VI is a synthetic, it kinda makes sense in my mind since the thinner synthetic fluid would reach the overdrive clutch packs better than regular transmission fluid.

 

[Oldsmoletick]

According to GM dexron VI is backwards compatable to older vehicles that used dexron III and dexron II. I still run dex III in my car (th350), but like dex II which is what these cars came with I believe, dexron III is slowly being phased out. I honestly would stay with dexron III, but that's just my opinion.

*However, dexron VI is NOT compatable with power steering or manual transmissions though.....So it does lack something?

 

[84cutspreme]

I use dextron III in my 700, I was told to use it my trans shop buddies

 

[jrm81bu]

Well you gotta figure when the 700r4 was introduced they didn't have Dexron V, VI, or even III. I would stay with Dex III, bowtieoverdrives recommends to not use sythetics.

 

[tc1959]

Dexron VI is backward compatible with all Dexron capable transmissions according to GM.Com, However Dexron III is not compatible with new car transmissions. Hope this helps. Soon there won't be any Dexron III around It is being phased out just like Dex II was.

 

[megaladon6]

i've not heard good things about synthetic ATF. Dex 4 is VERY good, and costs the same as 3--and is completely compatible of course--i've also heard that ford type F is a very good "performance" atf in gm transmissions.

 

[84cutspreme]

i've also heard that ford type F is a very good "performance" atf in gm transmissions.
i've not heard good things about synthetic ATF. Dex 4 is VERY good, and costs the same as 3--and is completely compatible of course--i've also heard that ford type F is a very good "performance" atf in gm transmissions.

I have heard the same, I believe Freddy Brown Race Transmissions uses Ford trans fluid in GM trans.

 

[1evilregal]

i've also heard that ford type F is a very good "performance" atf in gm transmissions.

it's basically what the b&m "trickshift" fluid is, but with a few other additives in it... something to do with the friction modifiers in the fluid, causing the clutch packs to grab at lower pressures... I could be wrong though, older minds play tricks!