The TH700-R4 is a 4-speed automatic transmission with an overdrive that first entered production by General Motors in 1982 to replace the TH350. The TH700-R4 was updated beyond the initial release and became known as a very durable and reliable transmission and was eventually renamed as the 4L60 transmission. Raybestos Powertrain offers a wide variety of OE replacement and enhanced material TH700-R4 friction clutch packs to increase performance and towing capacity. See more product details below.