greend216

For tranny fluid ?

Darth_V8r

iTrader: (4)

Present

Firebrian

Dailydriver tried RP synchromax a number of years ago in a stock 2000 T56 with the OEM cellulose lined blocker rings. He had immediate problems with grinding shifts, worst that he ever had with any fluid. Dumped it 24hrs later for a synthetic ATF and it was fine.

If you have the 2001 and later style carbon blockers then Synchromax might work ok. Most that use it seem to be ok with it. But, who knows how many tens of thousands of miles they got on their synchros before selling the car or how long they would have lasted vs. some other ATF or MTF.

Here's a post on the use of varying fluids in a T56. No easy answers and lots of opinions. The research I did on it was summarized on the last couple of pages.

https://ls1tech.com/forums/manual-tr...l-support.html

https://ls1tech.com/forums/manual-tr...56-others.html

Eiyse98ls1

Just installed in my rebuild trans. We'll have to see how it works out in couple of days

Redbull87

iTrader: (3)

I didnt like the RP in my trans either. I had the same issues..felt notchy in the mornings,started grinding shifts etc. I know Im due for a rebuild soon but when I swapped clutches I went back to atf and it felt smooth again and hardly would grind shifts into 3rd as much. Just my experiences with it.

Eiyse98ls1

Yea. I got about 163miles so far breaking in the clutch and I'm feeling the notchyness in the morning mainly. Sometimes won't go into 2nd. Not sure if has to do with the tick master adjustment or not. But I followed their directions by adjusting towards the floor then starting the car at every adjustment to put into 1st until smooth. 1st is fine then sometimes when driving it wil not want to go into 2nd, 3rd.😩

greend216

I heard It's the synchromax that isn't good I decided not to go with it and did regular atf my break in is going just fine.

patSS/00

iTrader: (6)

I had RP synchromax in my 2000 t56 for 9 years, it was smoother shifting than atf. When I drained it though, seemed sort of watery (like atf, lol). Now using Redline MTF, the best/smoothest of anything I've tried (but might not be good for really cold weather).

A good post on this topic: https://bobistheoilguy.com/forums/ub..._U#Post4328659

Firebrian

RP Synchromax is basically a synthetic ATF with a boosted additive package. Same viscosity as ATF at approx 7.4-7.6 cSt. In the same league as Red Line ATF D4, Amsoil ATF ATD, Mobil 1 ATF, etc. They are all synthetic ATFs specced for manual transmissions....containing more anti-wear products than your typical conventional ATFs.