Ask Away! with Jeff Smith: Advice on Swapping a TH400 for an Overdrive 4L80E in a Full-Size Chevy Dually Work Truck
I have a 1981 Chevy C30 dually truck with a 454 big block and a 3.73:1 rear gear. I’d like to remove the TH400 and replace it with a 4L80E. […]
