Transmission fluid you use that IMPROVED shifting over stock

[FordFreak]

How is it that some people say that stock fluid is better and some say aftermarket fluid is better? :shrug:

I think Ford would get away with using the cheapest fluid they could while still using somewhat quality stuff.
So I would think Amsoil, royal purple, etc would be better.

 

[sloopjonb]

Originally posted by ChicagoMike
I ended up going with the Royal Purple Synchromax. Night and day difference over the stock ATF.

Same here! Changed over to RP SynchroMax when the car had 1000 miles on it. Big difference in shifting, and it's quieter too. Still shifts very well in the cold too, which surprised me.

 

[toofast4u]

Take a look at this.
Tranny Fluid FYI

Here is a quote from that thread.

Originally posted by RJCobra
Immediately after replacing the stock tranny fluid with Redline D4, shifting became much harder for me. This is Tremec's explanation and recommendation, directly from the source:

I have attached a recommended fluid Service Topic that should help. We
do not recommend Redline D4 as a fluid for our T56 transmissions due to
the linings on the rings, it swells the material and causes a hard
shift.

Jon A. Vieth
Product Line Manager

My car shifted great at first, but is now at a point where it is much harder to shift. I hope going back to fossil oil resolves the issue and I don't need to re-build.

 

[hj16]

Originally posted by 03DOHC
Leave the stock fluid. It works great!

yup

 

[Crazee Horse]

I used Synchromesh in my 97 and it improved shifting tremendously. I have not tried anything in the 04 yet as it is not even broken in yet!

 

[davidmax]

There all fine products,but I tend to sell and install GM and on loud boxes I like royal Purple,Dave Smilovic

 

[Doc2003Cobra]

Originally posted by davidmax
There all fine products,but I tend to sell and install GM and on loud boxes I like royal Purple,Dave Smilovic

I have seen this car in person, shit, nice!!, how much does your car realate Dave to our cars (from the factory), Doc?

 

[RAZRS EDGE]

Any thoughts on gear oil for the rear differebtial?

Dont mean to hijack the thead, but post for tranny and rear diff.

 

[SWEET03COBRA]

Take a look at this.
Tranny Fluid FYI

Here is a quote from that thread.


My car shifted great at first, but is now at a point where it is much harder to shift. I hope going back to fossil oil resolves the issue and I don't need to re-build.

Does it say anything bad about GM syncromesh?

 

[Doc2003Cobra]

Gm synchromesh is what comes in our cars stock, correct? Also, is it fully synthetic or dino? Thanks, Doc.

 

[bones]

Dexron III from the factory and recommended by Tremec.

 

[ChicagoMike]

ATF ONLY. Dexron III is the stock fluid in our T56 transmission.

Gm synchromesh is what comes in our cars stock, correct? Also, is it fully synthetic or dino? Thanks, Doc.

 

[03blacksnake]

I didn't vote because I'm still using the stock fluid. I just wonder how many out there that noticed a big change, was due to simply changing the fluid and not the type of fluid used.

 

[redstaf426]

I use Mobil ATF,no difference what so ever,I'm thinking about trying out the GM synchromesh,does it need the ford Friction modifier???

 

[ChicagoMike]

Since I switched to Royal Purple synchromax (manual trans fluid for ATF recommended manuals) the feel of putting it into a gear has changed. Once it's warmed up, it just slips into gear with little effort, like there's some kind of super-lube on the gears so they slide right in.

Stock fluid feels very notchy.

I didn't vote because I'm still using the stock fluid. I just wonder how many out there that noticed a big change, was due to simply changing the fluid and not the type of fluid used.

 

[swlacobra]

my trans shifts very good, so why take a chance on some non recommended oil and end up messing something up? i think sometimes we are tempted to mod things just because we want to, not because it needs it

 

[ChicagoMike]

Royal Purple Synchromax is a Dexron III ATF, which is recommended. Same with Amsoil ATF, Mobil 1 ATF. People like myself have felt a big difference in gear engagement with the RP Synchromax.

my trans shifts very good, so why take a chance on some non recommended oil and end up messing something up? i think sometimes we are tempted to mod things just because we want to, not because it needs it

 

[metaman]

Does GM put sincromesh in the t56 in the vette?

 

[HotRodHarry]

GM Synchromesh

 

[gregs 03 cobra]

At what mileage are you guys changing the fluid and how much does it take?
Greg