When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hey all
I recently inherited my grandfathers '79 F250 w/ 460 and C6. Trucks been sitting for years, and after a quick tune-up, I started putting on some miles. It has some sort of shift kit, and after fixing the many vacuum leaks, it doesn't seem to be shifting right.
I've tried adjusting the modulator, but I'm not noticing any difference. It currently shifts 1-2 at 25 - 30mph and 2-3 at 55-60mph. Not matter what I do, I can't seem to get it to change. Any thoughts?? Thanks!