04 Chevy 2500HD, 56K Transynd ATF, 133K

[TXHunter]

All tests were against the same fill of Allison/Castrol Transynd. Fluid was changed during the last sample and replaced with Amsoil Multi-Vehicle ATF. I'll probably run this up to 50K before doing my next sample. Still don't understand why the viscosity was so much lower than what Castrol states for the Allison ATF. Previously this AT was filled with Valvoline Maxlife ATF, but no UOA's were ever conducted.

Code:


OIL Allison Allison Allison ATF

MILES IN USE 55,999 45,909 22,681

MILES 133,314 123,224 99,996

SAMPLE TAKEN 12/8/12 6/13/12 7/19/11



ALUMINUM 13 11 9

CHROMIUM 0 0 0

IRON 34 28 23

COPPER 25 23 19

LEAD 42 37 34

TIN 0 0 2

MOLYBDENUM 0 0 0

NICKEL 1 1 0

MANGANESE 1 1 1

SILVER 1 0 0

TITANIUM 0 0 0

POTASSIUM 2 1 0

BORON 133 116 123

SILICON 5 4 3

SODIUM 6 4 5

CALCIUM 72 65 57

MAGNESIUM 2 1 1

PHOSPHORUS 349 310 298

ZINC 11 9 9

BARIUM 1 1 1



SUS @ 210 45.5 46.0 45.1

cSt @ 100 5.87 6.03 5.77

FLASHPOINT 410 375 390

WATER % 0.0 0.0 0.0

INSOLUBLES % 0.0 0.0 0.0

TAN 1.7 2.1

 

[dnewton3]

Thanks for info.

Wear seems very consistent (within normal variation).

Fluid could go further, despite being a bit thin. (Which is perhaps an indication that vis isn't everything, as many of us know and would also suggest that the thinner DEX VI is suitable for 1000 series use ..., but I digress ...)

The ATF will be a good choice, and will be easily capable of 50k miles. Take a sample then BEFORE you dump; probably will be able to do more.

 

[3311]

I remember seeing thier fluid condemnation limits somwhere on thier(Allsion) site.

 

[dnewton3]

Originally Posted By: 3311
I remember seeing thier fluid condemnation limits somwhere on thier(Allsion) site.



I've not seen that, but I most certainly might have missed it.

If you have a link, I would greatly appreciate it!