Review on Royal Purple Synchromax Manual Transmission Oils & Fluids by David Pearson

Bought a used 2010 Challenger RT (6 Speed, Tremec 6060) with 35,000 miles on the odometer. The previous owner had no record of changing the MTF so I decided to do this as preventative maintenance due to age. I noticed an immediate difference in shifting smoother and shifting was less jagged. The Dodge's 6-speed transmission isn't as smooth as the Honda, but it's 50% better overall. would recommend