What oil are you guys running with truetrac

[Merc]

Originally Posted by BMR Sales

I use this stuff.....Lucas 85W140 Non-Synthetic.....I was told this was the best stuff to run with the TrueTrac.

https://www.lucasoil.com/products/di...how&headTitle= - Lucas Heavy Duty 85W-140 Gear Oil

That's what I run in my Hammerhead/Wavetrac as per DSS.

[Merc]

Originally Posted by Cat988h

That is what I want to run but I am having trouble finding it here in Canada.

Lordco has it.

[bhillakaiceberg]

Originally Posted by CamaroRich

How much fluid did you guys end up using? I filled mine until it ran back out of the fill hole, and it was about 1/2 quart. I was expecting more like a whole quart?

Same here, only about 1/2 qt. I thought I would use more when I refilled it.

[SmokedSS]

The shop that installed mine used Synthetic oil. It would sometimes make a screeching noise going around a tight right hand turn 30-40mph mild acceleration. Talked to Eaton and then asked shop to change oil.

[CamaroRich]

Originally Posted by SmokedSS

The shop that installed mine used Synthetic oil. It would sometimes make a screeching noise going around a tight right hand turn 30-40mph mild acceleration. Talked to Eaton and then asked shop to change oil.

Good move. It calls for 85W 90 non synthetic with no modifiers

[BLTZKRG]

Yep conventional 85w 90 for tru tracs...no modifier needed...doesnt need it with the carbon fiber clutches. Synthetic shouldnt cause problems...but it could over time and if u need to warranty it they wont since what they recommended wasnt used.
I think it has to do with the clutches...synthetic may not allow them to heat properly, or may be "too" slick. Im not sure just educated guesses.

[X25]

Originally Posted by BLTZKRG

Yep conventional 85w 90 for tru tracs...no modifier needed...doesnt need it with the carbon fiber clutches. Synthetic shouldnt cause problems...but it could over time and if u need to warranty it they wont since what they recommended wasnt used.
I think it has to do with the clutches...synthetic may not allow them to heat properly, or may be "too" slick. Im not sure just educated guesses.

Tru trac is Torsen type, and does not have clutches. I'm also wondering if there's any synthetic that would both work and not interfere with its operation, since I fear non-synthetic might break down much faster at high temps of the road course track duty.

[White_SS/RS]

Originally Posted by X25

Tru trac is Torsen type, and does not have clutches. I'm also wondering if there's any synthetic that would both work and not interfere with its operation, since I fear non-synthetic might break down much faster at high temps of the road course track duty.

I think the argument against synthetics is they are too slippery and prevent correct bias function. There may be a synthetic that's similar to conventional but Torsen users will probably just have to suck up the frequent oil changes during heavy duty usage.

[Synner]

The Z28 diff cooler setup is already available for those concerned with the high temps of standard fluid in track use. Pace Performance hooked me up the first month the Z28 rolled off the assembly line. If I had waited a bit I could have gotten the whole pumpkin a bit cheaper than my 1LE diff plus eaton install; then just ordered the lines. Oh well, if I hadn't spent it my wife would have.

[X25]

Originally Posted by Synner

The Z28 diff cooler setup is already available for those concerned with the high temps of standard fluid in track use. Pace Performance hooked me up the first month the Z28 rolled off the assembly line. If I had waited a bit I could have gotten the whole pumpkin a bit cheaper than my 1LE diff plus eaton install; then just ordered the lines. Oh well, if I hadn't spent it my wife would have.

You mean getting the whole Z/28 diff including the housing? I thought about that, but it leaves quite a few small parts missing (the stuff that comes with the diff cooler kit). Also ordering the cooler kit just for those parts would not make sense, either, since you'd then have two housing bottom lids with the cooler.

[Synner]

I got the lid and lines all separately. But now you can get the pumpkin and then just order the lines plus 3 small brackets. Install is easy.

[X25]

Originally Posted by Synner

I got the lid and lines all separately. But now you can get the pumpkin and then just order the lines plus 3 small brackets. Install is easy.

You wouldn't happen to know part numbers of all those extra parts and lines, would you?

I actually have a copy of the cooler kit's installation manual that lists all parts, but it's still hard to know for sure what is needed, and what is not.

[X25]

Amsoil replied and stated the severe gear diff fluids indeed have additive, so they would not work well.

EDIT: The fluid below has the additive.
I found this, though:
75W-90 Long Life Synthetic Gear Lube
http://www.amsoil.com/shop/by-produc...?code=FGRQT-EA

I don't see "No need to add friction modifiers" statement on this one. If it works, it might prove to be a long lasting solution.

I just replied to Amsoil's email and asked about this fluid, too.

FYI, Amsoil displays the severe gear fluid as well as this long life variant for both SS and Z/28. I wonder if they know about Z/28's different diff.

Does the user's manual call for a different fluid for Z/28 diff? Perhaps GM designed it to work with any fluid, unlike Eaton.

[Synner]

Originally Posted by X25

You wouldn't happen to know part numbers of all those extra parts and lines, would you?

I actually have a copy of the cooler kit's installation manual that lists all parts, but it's still hard to know for sure what is needed, and what is not.

I can get you the full parts diagrams, photos, and description in a day or two. Unfortunately I'm still deployed and the ordering paperwork with all the part numbers is 7,000 miles away. I've got the contact info for the vendor that got me everything and he can get you squared away.