Royal Purple 01512 Set of 4 Synchromax Manual Transmission Fluid 1-Quart Bottles

Used this fluid to replace the manual transmission fluid in a 2005 Mustang GT. Noticeable improvement in shift smoothness. Excellent results

Car shifted like it was new again was having a problem with first gear, popping out and grinding change with sync Romax, and no more issues with gearshifting. Feels like a new car again.

Some good stuff, use it in a built and boosted M6 Challenger

I own a 2017 Corvette Z 51 stingray seven speed manual and at 20,000 miles I decided to change the transmission oil and I put this in instead of what the factory calls for , and this Royal purple gear oil actually made a huge difference in the performance way my car shifts it's a lot smoother and quicker so it definitely is worth the money if you are going to change your transmission oil on a standard transmission

Used this in a nv3500 with 200,000 miles on it. It immediatly started shifting better and the bearing noise almost completely went away. Cannot recommend this enough for any Manual trans that requires syncromesh fluid.

Product works great. Run it in C5 race car

Seems like a very good product !!

Love the oil in my Jeep. Runs like a champ. Purple is my favorite color, but would prefer the product not be dyed purple… would make monitoring fluid age based on color easier.