AC Delco, 458mi (2.5yrs), 97 Chevy C3500

[TXHunter]

Sample was done 2.5yrs after pan was dropped and AT refilled. This is a cattle feed truck used on a ranch that rarely if ever sees paved roads. Will probably run another 2.5-3yrs and resample to see how metals are faring. First sample was unknown mileage with unknown fluid, but based on this 2nd looks a lot like the AC Delco ATF. I'm now wondering if that wasn't FF. No fluid was changed at time of this most recent sample.

Make/Model: GM 4L80E Transmission
Vehicle: 1997 Chevy C3500 Silverado

Code:


OIL AC Delco ?

MILES IN USE 458 ?

MILES ON UNIT 118,104 117,464

SAMPLE TAKEN 1/2/14 6/18/11

MAKE UP OIL 0 0



IRON 75 157

CHROMIUM 0 0

NICKEL 0 1

ALUMINUM 14 30

COPPER 142 287

LEAD 248 570

TIN 8 36

CADMIUM 0

SILVER 0 0

VANADIUM 0

SILICON 7 14

SODIUM 4 13

POTASSIUM 2 2

TITANIUM 0 0

MOLYBDENUM 0 0

ANTIMONY 2

MANGANESE 0 2

LITHIUM 0

BORON 89 84

MAGNESIUM 1 3

CALCIUM 57 41

BARIUM 0 1

PHOSPHORUS 241 250

ZINC 11 15



Water %
Visc @ 100C 5.6 4.95

TAN 1.24

Oxidation 11

Nitration 4

SUS @ 210F 42.5

Flashpoint 355

Antifreeze % 0.0

Insolubles % TR


Vendor Comments:
Flagged data (Copper/Lead/Tin) does not indicate an immediat4e need for maintenance action. Continue to observe trend and monitor equipment and fluid conditions. Cluth facing and/or bushing/thrust metal is at a MINOR LEVEL; Viscosity is SLIGHTLY LOW.

 

[LazyPrizm]

Where do you get ACDelco branded ATF? Is this Dex-III?

 

[michaelluscher]

Originally Posted By: LazyPrizm
Where do you get ACDelco branded ATF? Is this Dex-III?


Amazon?

 

[daves87rs]

Wonder if it would be worth throwing some cheap dex/merc in there...

 

[TXHunter]

I assume this is Dex III/Type III. The mechanic they are using used to work for the local chevy dealer. They only use Delco fluids.

 

[MolaKule]

This signature is one of plain old DexronIII.

The lead sure makes me wonder where the source of that is coming from.

Most if not all of the bearings are steel pin bearings and or steel ball/roller bearings.

Did anyone, to your knowledge, put in some kind of wierd aftermarket additive in the AT?

Recommmend getting a VOA of the fluid next time in order to establish a baseline.