Re: What is a TH-475...?
Everything I can dig up pretty much indicates that the TH475 has straight-cut gears, a heavier case, and provisions for a tailshaft mounted parking brake, sometimes has a bolt-on rear yoke, and deep pan. They were used in heavy duty trucks and motorhomes.
Originally Posted by britt'sStage 1
I think the reason you don't hear about any of us Buick guys using them is that they were a Chevy bellhousing pattern only. The TH475=3L80HD
Project: Warbird - Zero deck '72 block bored .030, 10.25:1 Hyper slugs, '75 crank and rods, Poston GS114 (.480/.495), Comp Cams rockers and shafts, TA Stage 1 350 Intake, Q-Jet, 1" open spacer, Holley Blue pump and regulator, MSD 6AL, Accell HEI Super Coil, Taylor wires, AC plugs Melling HV oil pump, Hooker Super Competition Headers, Supertrapp 5A Stainless suppressors. B&M kitted TH350, 2800 TCI converter, 8.5 w/lockright locker and 3.42 gears.