A common problem with automatic transmissions is rough and hard shifting due to poor maintenance. Nearly nine out of ten transmission failures are due to overheating and fluid contamination, according to the Automatic Transmission Rebuilders Association. Automatic transmission fluid suffers from heat, friction and contamination. As time goes on, the transmission's vital parts begin to coat with sludge and varnish. According to ATF (Automatic Transmission Fluid) manufacturers, the addition of new fluid to contaminated fluid can actually cause sludge and varnish deposits to clog filters and restrict the flow of transmission fluid.

With a regular transmission service
A regular transmission drain and fill service can leave as much as 75% of the old ATF behind in the torque converter and transmission cooler. When new ATF is added, it is immediately contaminated by the old ATF left in the system. The deposits left in the system can seriously impact the proper operation of the transmission.

With a Wynn's® Transmission Flush Service
The Wynn's Transmission Flush service is performed using the Wynn's TranServe™ or TranServe™II machine. Either machine is powered by the vehicle's battery and is connected to the transmission cooler line using the supplied adapters. Wynn's Transmission Flush is added to the transmission with the engine idling. The flush safely dissolves harmful deposits and suspends them for easy removal with either machine. A Wynn's Transmission System Flush Service will replace up to 95% of the old ATF with fresh ATF.