What trans fluid is recommended??

89fc3s · 12-08-2010, 01:02 PM

My N/A tranny has a lot of miles on it. It grinds downshifting to second. What fluid is the best for these boxes??

My5ABaby · 12-08-2010, 01:11 PM

Most people like to run a good synthetic such as Redline or Royal Purple.

Pete_89T2 · 12-08-2010, 02:17 PM

Quote:

Originally Posted by 89fc3s

My N/A tranny has a lot of miles on it. It grinds downshifting to second. What fluid is the best for these boxes??

I've been a happy user of Redline synthetic gear oil with all of my manual transmission cars for many years. For an FC, the proper Redline flavor to buy is MT-90, which is their 90 weight synthetic lube that best matches what the Mazda FSM calls for. You'll need to buy 3 quarts, and will have some left over. Don't know if it will solve your grinding problem, but it probably can't hurt.

12-08-2010, 01:02 PM	#1
89fc3s rotary powaaa Join Date: Jun 2008 Location: Charlotte NC Posts: 47 Rep Power: 0	What trans fluid is recommended?? My N/A tranny has a lot of miles on it. It grinds downshifting to second. What fluid is the best for these boxes??

12-08-2010, 01:11 PM	#2
My5ABaby Sigh..... Join Date: Feb 2008 Location: Murfreesboro, TN Posts: 2,377 Rep Power: 20	Most people like to run a good synthetic such as Redline or Royal Purple. __________________ 1986 Sport: 132k miles, 5A (Sapphire Blue Metallic), Tokico Blues, Racing Beat Springs, Custom LED tailights (only S4 LED tails in the world), SSR Mark II, Racing Beat exhaust, S5 black interior, Rotary Resurrection rebuild at 120k miles Community Service Manual RotorWiki "Imagination costs nothing; we could build square locomotives or fly to Mars" - Felix Wankel Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the "present."