# for the specific Royal Purple synchromax
Transmission fluid you use that IMPROVED shifting over stock
- Thread starter ChicagoMike
- Start date
I had the exact opposite experience. RP Syncromax didn't help at all. I now have GM Syncromesh, and though still not as smooth as I like the tranny does shift better than it did with the stock fluid and the RP.
My experience.
My experience.
There is no part number. There is only one kind. Go here to get it. www.karlracing.com cheap and very fast shipping.
will it hurt anything by going with the GM syncromesh over RP syncromax?
has anyone used the stock fluid with a friction modifier added? I am going to change mine this coming week while it is on the lift for the solid axle swap.
Has anyone tried B&M synthetic trick shift automatic transmission fluid??It says on the back label it may be used for Manual transmission that requires automatic transmission fluid.I bought 4 quarts,trying it out tomorrow.
Mike_Hawk said:
No good
I don't know if it will make any difference by itself. The main thing it does is quiet down the gear noise from the aftermarket shifter installed at fluid change. But it wouldn't hurt.TrueBlueGT said:
Not at all. The GM is what is actually the main one said to use. But the RB is full synthetic that people have tried and found to work as good or better. Either is better than the factory.Wings65288 said:
2003 Silver
Banned
So it's either the GM product or Royal Purple...that's the general opinion and either is better than stock. My 03 Cobra has 3,800 miles on it....is it too soon to switch it out or personal preference??
Well I broke down and made my decision. I went with the Royal Purple. I seeked out a local dealer here in Socal and went ahead and got the engine oil, tranny oil, gear oil. I had them all changed today. As far as I can tell, the tranny oil worked like a champ. The noise is almost all gone, and the notchiness has been reduced a significant amount. It feels alot smoother. The engine seems quietier as well as the rear end. I'll keep an eye out for leaks, as I do drag race most weekends. Now make sure you get the Synchomax tranny fluid. There is another fluid the Max ATF, which you dont want. The tranny and gear oil bottles look the same.I recommend these products to all.lol :coolman:
Last edited:
any updates on this thread? GM synchromesh vrs. Royal Purple Synchromax? i'm doin a few maitenance updates to my Cobra this next weekend like getting a new filter for my STEEDA, installing my new bassani catted X, and also while i'm under there i'm going to put new tranny fluid in and i need to order it tomorrow so it will get here on time.
oh and btw is the part # SCM-BQ for Royal Purple Synchromax? and is this it on this page http://www.karlracing.com/html/purchase_atf_syncro_p_s_.html
I just got some GM synchromesh and fricking modifyer from ford. It came in a 4 ounce bottle, Should i put the whole thing in?
yea thats a good question
i found out it's only half of the bottle (2 ounces).
I changed mine yesterday for the first time. I used the GM Synchromesh and man it shifts slick as as snot on a brass door knob! I went ahead and installed the Cobra Bob shifter gasket set also and now there is ZERO roll over noise from the tranny. Both are great products!!!
Yep...that GM Synchro is awesome...Nitrous Pete had told me to use that back in 2002 on my first 03 Cobra
nice, i just found out Pennzoil Synchromesh is the same thing as GM Synchromesh
Users who are viewing this thread
