Royal Purple Synchromax Manual Transmission Fluid
07-06-2008, 08:56 AM
#1
Drifting
Thread Starter
Royal Purple Synchromax Manual Transmission Fluid
I assume the answer may be no, but can you run Royal Purple Synchromax Manual Transmission Fluid in a 1969 M21 manual transmission?
07-06-2008, 09:04 AM
#2
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It's designed to run on 80/90 gear lube. That's what I have always used. The synthetics are too slippery to protect the gears.
07-06-2008, 09:04 AM
#3
Race Director
I think Synchromesh is a little light for this type of transmission. I have ran synchromesh in the TKO that is in my car. Someone else please confirm this for us. I did however run Mobil synthetic gear lube in my M20 when I had this transmission. It seemed to help the M20.
07-06-2008, 09:42 AM
#4
Nope, you cannot run Synchromax in your Muncie. This lube is basically automatic transmission fluid and is designed for the T-5, T-56, and some of the newer manual transmissions. Stick with the recommended 90W.
07-06-2008, 10:21 AM
#5
Melting Slicks
I'm using RedLine's manual transmission oil in my Richmond 5 speed. The transmission shifts MUCH smoother now than when I had a synthetic gear lube in it. Little pricey, but well worth it 
.
http://www.redlineoil.com/products_g...7&categoryID=7
.http://www.redlineoil.com/products_g...7&categoryID=7
07-06-2008, 12:01 PM
#6
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I think that if you look at the Royal purple website the appropriate gear oil would be the Max-gear 75w90 or 80w90.
You could also call royal purple.
You could also call royal purple.
