Most use Hy-Guard or the Low Viscocity Hy-Guard. The Low Viscosity is a direct swap for most ATFs, except if you read the standards is MUCH more durable and maintains viscosity better at higher temps and that's what we WANT.

I would suggest the low viscosity for anybody wanting to swap.

We have run regular Hy-Guard and a lot of guys with Bruno's and Lenco Drives use this. The regular Hy-Guard will generally tighter your converter up about 200-300 on the stall.