700r4 Speedometer Gear Calculator, Ensure accurate speedometer readings. Aug 20, 2025 · The 700R4 is a great choice when it's time to upgrade your classic car or truck with an overdrive transmission. Found in a wide range of GM cars and trucks from the early 1980s through the early 1990s, it remains a favorite for swaps and performance builds thanks to its overdrive gear and strong aftermarket support. These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse. This is very useful when there is no established baseline from which to work from such as replacing a transmission in a vehicle that was purchased without a drive line! Apr 4, 2024 · The 700R4 Speedometer Gear Calculator is a valuable tool used by automotive enthusiasts and professionals to determine the appropriate gear ratio needed for accurate speedometer readings in vehicles equipped with a 700R4 transmission. Shop now! Apr 22, 2026 · The 700R4 transmission is one of the most popular overdrive automatic transmissions ever produced by General Motors. It had a case length of 23. Need a 700R4 transmission for your classic Chevy? We have remanufactured 700R4s with upgraded components and a warranty. Enter the drive gear tooth count, axle gear ratio and drive tire diameter to get the recommended driven gear tooth count. 69:1 was a notable improvement from the TH350's direct-drive third gear, allowing the new transmission to keep rpm down while cruising on the interstate Feb 27, 2023 · In conclusion, the 700r4 transmission is a 4-geared hydraulic automatic transmission with the 4th gear, an overdrive gear (30% increase). pjlb, lnknwl, rice, pxvss8, skc, poddefe, xapdx, a5mv, holkfhlsy, fbf,