2004 Chevy 2500HD, 60k Amsoil ATF, 194K

[TXHunter]

On the 50K sample I swapped out the Wix AT spin-on filter and had to replace right at 1QT of fluid. Metals look better now at 60K. Sent a note to Blackstone and curious here to see how much further you all think I can safely push this fluid. Fluid was not changed at time of sample.

Make/Model: Allison 1000
Vehicle: 2004 Chevy 2500HD

Code:


OIL Amsoil ATF Amsoil ATF Allison Allison Allison ATF

MILES IN USE 60,568 50,547 55,999 45,909 22,681

MILES 193,882 183,861 133,314 123,224 99,996

SAMPLE TAKEN 6/22/16 10/7/15 12/8/12 6/13/12 7/19/11

MAKE UP OIL 1QT 0 0 0 0



ALUMINUM 10 11 13 11 9

CHROMIUM 0 0 0 0 0

IRON 31 36 34 28 23

COPPER 22 23 25 23 19

LEAD 23 26 42 37 34

TIN 0 0 0 0 2

MOLYBDENUM 0 0 0 0 0

NICKEL 0 0 1 1 0

MANGANESE 1 1 1 1 1

SILVER 0 0 1 0 0

TITANIUM 0 0 0 0 0

POTASSIUM 1 4 2 1 0

BORON 155 164 133 116 123

SILICON 6 7 5 4 3

SODIUM 7 6 6 4 5

CALCIUM 127 139 72 65 57

MAGNESIUM 1 1 2 1 1

PHOSPHORUS 398 412 349 310 298

ZINC 9 10 11 9 9

BARIUM 1 1 1 1 1



SUS @ 210 46.5 52.7 45.5 46.0 45.1

cSt @ 100 6.20 8.08 5.87 6.03 5.77

FLASHPOINT 425 405 410 375 390

WATER % 0.0 0.0 0.0 0.0 0.0

INSOLUBLES % TR 0.0 0.0 0.0 0.0

TAN 2.1 2.6 1.7 2.1


Blackstone Comments:
This transmission continues to look good on our end, and at this time, that's after using an even longer interval than before. There's actually a little less metal this time compared to the last, and that's always nice to see. If any issues exist for this unit, they aren't apparent in the data. Contamination isn't a concern and the TAN shows mild acidity at 2.1. The trace of insolubles is fine. We're glad this oil is still in place because it can see more use.

 

[i_hate_autofraud]

Hi,

Since you have a spin-on tranny filter, you should try Filter Mags that match the diameter of your filter provided there's at least 1/2" clearance all around to the tranny or other parts.

The idea is to capture and reduce Iron wear metals that cause additional wear since no filter can catch metals under 20 microns, especially 5 microns and less. Metal particles can enter the valve body and cause spool valves to stick, often the shift solenoids are blamed, but they can't push a sticking valve.

A cheaper experiment is to grab some 2" long 3/16" square neodynimum bar magnets to stick on the filter.

Check the Pic with my eng oil filter. I've got 2 Filter Mags on plus a couple of 2" bar magnets wherever there's space. This is what 10 PPMs iron looks like at just 7,000 miles, you have 30 to 35 PPMs iron, so you'll catch lots more!

I've increased the number of magnets in my 4T65E transmission for the same reasons. GM does the least possible since any added part costs more then they want to spend.