Nick Johnson from Gear Vendors talks about how an overdrive unit can help a car equipped with a TH400 transmission. Toll Free Order Line 1-87 TH400 | 4L65E | 4L85E | 6L80E | 8L90E News Tech Help Jobs Contingency Warranty: Contact Us 6718 Whitestone Road … A touch under $3,000 will get you a Full-Length 1200 HP GM Powerglide Transmission.
