I'm coming up on my first oil change and plan on doing a complete change over to synthetics. I've heard pros and cons about using synthetic ATF in a manual due to the change of friction and the syncros. What are your opinions? Also, what brand of synthetics do you all use? I'm planning on using Royal Purple.

 

Y2KLaser, I have used Redline ATF in both of my last 2 mustangs and now my truck. I believe both manuals shifted better with the synthetic and I never had a problem.

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99 F150 XLT Silver 2WD S/C 4.2 5-speed, Superchip, Flowmaster muffler // Rear door switch guards - check them out at <A HREF="http://www.geocities.com/motorcity/show/5031
pud@iainc.net" TARGET=_blank>http://www.geocities.com/motorcity/show/5031
pud@iainc.net</A> -- Kennesaw GA

 

I replaced the manual tranny fluid in my Miata several years ago with Redline synthetic-it really smoothed things out. Will do the same for my F150 when it's due.

 

I'm using Red Line MTL. I didn't use their ATF because the MTL is specifially designed for a manual transmission. It is supposed to have all the correct friction properties a manual trans needs. And it does shift smooth...

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Danny
'98 F-150 Std., RC, SB, 4x2, 4.2L, 5-sp, 3.08, AC, speed control, rear slider
with Syntec engine oil, MTL trans fluid, Edelbrock IAS shocks, 50 Series Flowmaster, K&N with airbox mod, electric radiator fan, Superchip