TREMEC T56 Magnum S197 Transmission

[HOLLYWD69]

4 x Quarts

Thats what i thought just making sure, Thanks

 

[AutoXRacer]

So what kind of fluid is everyone using in these trans? I ready to do my install and need to buy some fluid.

I initially ran Red Line D4 ATF and found out it did not perform too well during cold days; gears were clashing.

I then swapped it out for Mobil 1 ATF and the shifting felt 100% smoother!!
I was later informed this transmission was designed using Mobil 1.

 

[HOLLYWD69]

I initially ran Red Line D4 ATF and found out it did not perform too well during cold days; gears were clashing.

I them swapped it out for Mobil 1 ATF and the shifting felt 100% smoother!!
I was later informed this transmission was designed using Mobil 1.

I was just about to ask about Mobil 1 LOL

 

[Gray Ghost GT]

Most of the Corvette guys I know (including myself) prefer the Royal Purple Synchromax fluid over the Mobil 1 in our T56 transmissions for smoother shifting and performance. Never had an issue in over 7 years of using that product (daily driving and road course).

 

[AutoXRacer]

Most of the Corvette guys I know (including myself) prefer the Royal Purple Synchromax fluid over the Mobil 1 in our T56 transmissions for smoother shifting and performance. Never had an issue in over 7 years of using that product (daily driving and road course).

How does it perform (shifting) in cold weather... 40-ish degree weather?

Might try it...

 

[Gray Ghost GT]

How does it perform (shifting) in cold weather... 40-ish degree weather?

Might try it...

No problem in 40 degree weather. I've never driven my Corvette during freezing temps (no traction), but smooth as silk in the 40s.

I think you'll like the results. It's the only Royal Purple product I recommend. Here are some threads on the Corvette Forum: LINK

 

[HOLLYWD69]

Thanks for the input.

 

[skwerl]

Tremec specifies Mercon 5 synthetic ATF. I also used Mobil1 and it works great.

 

[Gray Ghost GT]

The T56 transmission calls for fluid #88861800 (GM fluid spec/part number), which could equate to using Royal Purple Synchromax - check out this link.

Synchromax is recommended for manual transmissions that specify an automatic transmission fluid (ATF). There are a few good options. RP works for me.

 

[screaming_pc]

I was told to use Dex/Merc. The sticker on the transmission itself says dexron III

 

[69Mach1-409]

I've been running Mobil 1 and with the exception of the 1,600 - 1,900 rpm rattle the trans works great with it.

 

[AutoXRacer]

I've been running Mobil 1 and with the exception of the 1,600 - 1,900 rpm rattle the trans works great with it.

You got that rattle too? Oh I hate it!!!
I thought it was just me and my twin discs... lol

 

[69Mach1-409]

Yup, I have a twin disk too, so it still could be that.

 

[Gray Ghost GT]

Its the twin discs causing the rattle in your transmission, but not all twin disc clutches are the same - same rattle, some don't. I tried one clutch brand and it rattled, then I went to the RPS twin disc in my Corvette and no rattle at all. Race parts vs. OEM; always a trade-off.

 

[Hatchman]

I got the twin disk RST rattle as well, and Mobil 1.

 

[svtrojan]

You got that rattle too? Oh I hate it!!!
I thought it was just me and my twin discs... lol

I've got that rattle too... we should start a support group

 

[69Mach1-409]

ROFL

 

[88_50]

Wow, 51 pages. That only took all my day. Oh well, I was at work and got paid to read...haha

I think I have everything for my swap minus the driveshaft. What ds are you guys running? I got one quote from Tommy@JPC so far. Just want to see whats out there before I pull the trigger. I noticed the Dynotech has the rear spacer. My current one piece ds doesnt have the spacer. Its a direct fit. Im looking more for an Mag XL ds without the spacer. Any suggestions?

 

[AutoXRacer]

Wow, 51 pages. That only took all my day. Oh well, I was at work and got paid to read...haha

I think I have everything for my swap minus the driveshaft. What ds are you guys running? I got one quote from Tommy@JPC so far. Just want to see whats out there before I pull the trigger. I noticed the Dynotech has the rear spacer. My current one piece ds doesnt have the spacer. Its a direct fit. Im looking more for an Mag XL ds without the spacer. Any suggestions?

My understanding is that there is only one option. I have the Dynotech with the adapter; not a spacer.
The OEM driveshaft has a spacer.

Here it is with the adapter installed:

Basically, the OEM driveshaft has a spacer, but its integrated into the CV joint.

This adapter simply provides a surface for the u-joint to bolt onto; the pinion interface is 6 bolts while the u-joint is 4 bolts.

 

[88_50]

This is the one I currently run. Its an excellent unit. I sent them an email this morning to see if they offer an XL ds.

http://shaftmasters.com/mustang-aluminum-driveshafts.html