2017 Corvette / 7.6k / ACDelco MTF

[dparm]

Here's the latest form my 2017 Corvette Grand Sport's transmission (Tremec TR-6070). GM recommends changing every 15 hours of track use so that's what I did. I might shorten that a bit next time since it's really thinning out, or maybe move to a more stout fluid.

Blackstone said they think things look fine and I largely agree.


Code


OIL ACDelco MTF ACDelco MTF

MILES IN USE 7,623 6,392

MILES 14,015 6,392

SAMPLE TAKEN 10/20/18 9/22/17



ALUMINUM 8 11

CHROMIUM 0 1

IRON 52 82

COPPER 12 22

LEAD 1 1

TIN 0 1

MOLYBDENUM 1 2

NICKEL 1 2

MANGANESE 13 35

SILVER 0 0

TITANIUM 2 3

POTASSIUM 1 3

BORON 96 46

SILICON 9 16

SODIUM 4 9

CALCIUM 21 0

MAGNESIUM 0 1

PHOSPHORUS 234 160

ZINC 7 11

BARIUM 1 3



INSOLUBLES 0.1 0.2

WATER 0 0

FLASHPOINT �F 390 385

SUS VIS 210�F 42.3 43.4

cSt @ 212�F 4.89 5.23

TBN - -

TAN 1.3 1.3

 

[AZjeff]

Track vids or it didn't happen!

 

[cpayne5]

Originally Posted by AZjeff
Track vids or it didn't happen!

He's posted quite a few.

Here's the most recent thread: https://www.bobistheoilguy.com/foru...-bucket-list-track-complete-road-america

 

[SatinSilver]

I wonder if using the Friction modified mtf version would help any? Not that the results are bad by any means. But maybe lower some of the wear metals a bit.

 

[AZjeff]

Originally Posted by cpayne5
Originally Posted by AZjeff
Track vids or it didn't happen!

He's posted quite a few.

Here's the most recent thread: https://www.bobistheoilguy.com/foru...-bucket-list-track-complete-road-america


I know but they're always fun to watch.

 

[MolaKule]

The only way to definitively assess the condition of the fluid is to do a New OIL (VOA) of the current fluid and THEN compare that to the UOA.

For example, how do we know it sheared or how much it may have sheared without a VOA since formulations change.

What was the part number of the ACDelco fluid?

 

[cpayne5]

Originally Posted by AZjeff
Originally Posted by cpayne5
Originally Posted by AZjeff
Track vids or it didn't happen!

He's posted quite a few.

Here's the most recent thread: https://www.bobistheoilguy.com/foru...-bucket-list-track-complete-road-america


I know but they're always fun to watch.

 

[dparm]

Originally Posted by MolaKule
The only way to definitively assess the condition of the fluid is to do a New OIL (VOA) of the current fluid and THEN compare that to the UOA.

For example, how do we know it sheared or how much it may have sheared without a VOA since formulations change.

What was the part number of the ACDelco fluid?



It's GM 88861800, which is made by Petro-Canada:

http://seattleautomotive.com/files/SDS/10-4030 acd manual trans fluid 75w90.pdf

 

[MolaKule]

Originally Posted by dparm
Originally Posted by MolaKule
The only way to definitively assess the condition of the fluid is to do a New OIL (VOA) of the current fluid and THEN compare that to the UOA.

For example, how do we know it sheared or how much it may have sheared without a VOA since formulations change.

What was the part number of the ACDelco fluid?



It's GM 88861800, which is made by Petro-Canada:

http://seattleautomotive.com/files/SDS/10-4030 acd manual trans fluid 75w90.pdf


This is a 7.5 cSt@100C viscosity fluid which is definately NOT a 75W90 fluid, but falls within the 75W75 to 75W80 range.

This is essentially a "boosted" ATF with a bit of extra multi-functional AW agent.

Here is a list of fluids of other that fall within this viscosity range:

NOTE: This list is only a "suggested" list of MTFs. It is not an endorsement of any one fluid, nor is it implied that any one fluid will cure problems in MTs that have design problems or those that have excessive wear.

Royal Purple's Synchromax
Ravenol MTF-2
Honda MTF
VW part number G052512A2
BMW (Pentosin MTF 2) MTF-LT-1, 2 ,3
Tutelo (Petronus, Italy, Product Code 1402)
Pentosin Pro Gear 70W75 (Australia)
Pentosin FFL-4
Redline Power Steering Fluid
RAVENOL STF