I saw on your converter that you has written Dexron 3 or 6. I have a 400 that I'm going to be using soon, was wondering if 6 was backwards compatible. Back in the day, we used to use F, was said to be a better lube, and had an additive for clutches.
Dex 6 will retro but you really don't need it in a TH400 or similar vintage unit; I have numerous hard use/heavy duty TH400s, 350s, 700R4s etc that all run regular Dex/Merc without any issues with heat, clutch application consistency or the like...I also use it in my own 4L60Es. Dex 6 was formulated for the later six speeds 6Ls and to some extent very late model 4L60E/4L80Es but to my knowledge only the 6L transmissions' frictions were specifically designed to use it. I write that on the converters now a days as customers used to frequently ask if they could run Dex 6 and I'd tell them they could but it's not mandatory. So now they see it on the converters when they come pick up their transmissions. You can run type F but may need more frequent changes as while it provides for a bit firmer shifts, it wears a bit quicker...From what I have read, it was designed for frictions that used a combination of brass and asbestos elements in their composition (don't quote me on that, just what I have read on the net - you know how that goes, lol).
Awesome as always Nick. You have a PM on GMSB. Thanks
Thanks as always, man!
I saw on your converter that you has written Dexron 3 or 6. I have a 400 that I'm going to be using soon, was wondering if 6 was backwards compatible. Back in the day, we used to use F, was said to be a better lube, and had an additive for clutches.
Dex 6 will retro but you really don't need it in a TH400 or similar vintage unit; I have numerous hard use/heavy duty TH400s, 350s, 700R4s etc that all run regular Dex/Merc without any issues with heat, clutch application consistency or the like...I also use it in my own 4L60Es. Dex 6 was formulated for the later six speeds 6Ls and to some extent very late model 4L60E/4L80Es but to my knowledge only the 6L transmissions' frictions were specifically designed to use it. I write that on the converters now a days as customers used to frequently ask if they could run Dex 6 and I'd tell them they could but it's not mandatory. So now they see it on the converters when they come pick up their transmissions.
You can run type F but may need more frequent changes as while it provides for a bit firmer shifts, it wears a bit quicker...From what I have read, it was designed for frictions that used a combination of brass and asbestos elements in their composition (don't quote me on that, just what I have read on the net - you know how that goes, lol).