Are any TH400 and 4L80 parts interchangable?
I'm trying to find a way to get better than a 2.48 first gear and 1.48 second gear.
If they are interchangable, does anyone know where I can buy the parts?
TH400 and 4L80E's have the same gear ratios, I would guess you're looking to install the different aftermarket only ratios commonly offered for the th400 into a 4L80E?
TH400 and 4L80E's have the same gear ratios, I would guess you're looking to install the different aftermarket only ratios commonly offered for the th400 into a 4L80E?


