Royal Purple Synchromax Manual Transmission Oils & Fluids Review

Switched to this on my nv5600. Huge difference when switching. It used to only shift smoothly when the truck was cold, but now it shifts great all the time

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

I have a 2006 16 year old Ram 2500 with a 5.9 liter Cummins engine and a Mercedes G56 6 speed gearbox (224 .00 miles) and all that stuff. it worked great. It made a big difference when shifting and seemed to settle him down a bit. I used an extra 1 liter as recommended by many online. This is a mid-range lube that definitely beats its price. I live in Michigan and it was -10 degrees F last week and they have changed well even though it was cold. I couldn't be happier.

I have an 88 F250 with a ZF5 transmission (5 speed) and a 460 (7.5L) V8. This is an amazing thing, I have always liked Royal Purple oil and have used several other products with good results. I decided to change my transmission fluid/ATF and wanted something that offered slightly better protection for a manual transmission, namely better protection for the "yellow metals" (like brass and copper) used in manual transmissions. I just wanted to replace my existing fluid with something better that…