AMS13

When I did my clutch (Monster stage 2) over the winter I filled the tranny with a basic dex III from Napa. The tranny does not shift to smooth at all, and when I semi get on the gas and shift, it will sometimes grind. The car has a Tick MC in it, along with a speed bleeder.... I am wondering if its worth the $45 to try the GM Synchromesh, or is there a cheaper better alternative?

edge04

iTrader: (9)

I just swapped in the Penzoil Synchromesh, heard good things. Will be driving the car a lot today so will give feed back later

MeentSS02

iTrader: (11)

It won't hurt anything, so if you don't like it, you can just drain it and try something else.

Choppers

iTrader: (60)

Had nothing but grinding issues. Changed the fluid to Penzoil Syncromesh and it shifts perfect and smooth now.

bad67ls

iTrader: (2)

i use nothing but syncromesh in my richmond 5 speed. nothing else works lol.

predatorz28

Another happy synchromesh user here. I was running the mobil 1 stuff and it seems to slide into gear just a bit easier now, also less grinding.

Ferocity02

iTrader: (60)

Whats the difference between synchromesh and normal ATF?

Rare96LT1Formula

iTrader: (32)

Changed my trans mount and trans fluid to synchromesh and my car shifts like butter now. It was worth the money imo.

Deviant LS1

iTrader: (4)

The only difference I noticed with straight syncromesh was that the cold start notchyness was gone.

gmdoctor

iTrader: (3)

You guys using the friction modified?

oldmano2z

i' use gm syncromesh on a new build. don't know if i can say their name on here because they aren't a sponsor,but they build almost if not all the prostock trannys. had parts shot peened,cryo'ed and viperized with carbon fiber throughout and that was what was suggested to use and i have no problems. got 1k on trans now and changing it tomorow again to syncromesh. good stuff , not recomended for the paper rings, but good for carbon fiber

All-In

I use 50/50 mix:

Amsoil ATF Dex III synthetic
Amsoil MTF Synchromesh synthetic

Anti-venom mod (.082" thick)
MGW shifter


Buttah!

HoLLo

iTrader: (17)

I use only Pennzoil Synchromesh in my car, and in a recent GTO clutch install I did with a buddy. The fluid has always been nice and smooth for me.

Exidous

iTrader: (11)

I'll be rebuilding my t-56 in the next few months with the gearbox stage 2 parts. The tranny has about 30k miles on it and I don't think it has even been apart. It is very notchy. I look forward to trying some new syncromesh fluids to see what works later on. I would love to have a smooth shifting tranny.

AMS13

Well I manned aup and did it, put synchromesh in it. The car shifts 1000 times better, well worth the upgrade!

PAULZ98SS

iTrader: (5)

That's good it shifts better. Is your trans stock or rebuild?

Exidous

iTrader: (11)

Update.

The trans had been apart. By someone that did NOT know what they were doing. Silicone everywhere inside. I had to replace:
Mainshaft
5/6 driven
5th (inc syncro assy)
6th (inc syncro assy)
Rev (inc syncro assy)
keys
pads
3/4 fork
a $50 washer that should never have to be replaced

Think that's about it.

I tried four fluids after the rebuild. All carbon blockers.

Stock III ATF: VERY notchy. Hard to get into first.
Dex VI ATF: A little less notchy but not where I wanted.
Syncomesh: Better still but it still didn't feel like a trans should. Notchy/no grinding.
Redline ATF: Best I have found so far. It's not 100% smooth but a drastic improvement over the other three.

mikh338

iTrader: (16)

bg syncroshift here, awesome stuff

TheeCamaroKid

6 years later........Penzzoil or AC delco?

LS1 pwrd NOVA

iTrader: (2)