DEX III Analysis.. Interpretation

[OiledMustangGT]

code:

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Jeep cherokee AW4 automatic
Vehicle miles: N/A
Transmission Miles: 86ooo
dropped pan at 74000
Lab: Blackstone

                Actual	     Universal Average(52k)

Aluminum	7		11
Chromium	0		1
Iron		25		94
Copper	        59		74
Lead		27		24
Tin		0		2
Moly		0		4
Nickel	        0		1
Manganese	0		3
Silver	        0		0
Titanium	0		0
Potassium	0		2
Boron	        50		84
Silicon	        53		22	
Sodium	        7		13
Calcium	        126		937
Magnesium	5		94
Phosph	        294		745
Zinc		62		436
Barium	        10		399

Sub Viscosity @ 210	= 	43.9
	Should be		42-51

Flashpoint		=	385
	Should be		>355

Water			=	0.0
	Should be		<0.1

Insolubles		= 	TR
	Should be		<0.1

 

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trans might have been flushed around 60k accoring to previous owner. but still looks pretty good i think. trans cooler added around 70k on unit

 

[unDummy]

Yeah, looks good but viscosity is thin. Fluid sheared quickly. More frequent drain intervals needed, or a thicker/more stout ATF, or some transmission snot(like Lucas). Pennzoil/QS high(er) mileage ATF's are some of the thickest OTC ATF's out there.

 

[OiledMustangGT]

yeah i think the fluid gets too hot which i causing the shearing. i have the trans cooler as noted, but i think i might need a bigger one. although it is about 12"x10" plate stlye cooler located infront of clutch fan which should be more than enough

 

[OiledMustangGT]

anyone else have suggestions?

 

[bruce381]

oil is fine continue on with normal maintenece wish lab would show cSt like everyone else in the world SUS is older than me. bruce

 

[unDummy]

quote:

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Originally posted by OiledMustangGT: yeah i think the fluid gets too hot which i causing the shearing. i have the trans cooler as noted, but i think i might need a bigger one. although it is about 12"x10" plate stlye cooler located infront of clutch fan which should be more than enough

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The only way to determine if you have enough cooling is with an ATF temp gauge. Do you have one? Besides a cooler, you could also increase the ATF sump capacity either with a deeper pan, if available, or an external sump.

 

[OiledMustangGT]

no gauge yet. i am getting one when funds allow though

 

[TR3-2001SE]

I think this looks good and would tell me the transmission could go to 20,000 miles before a change. Could be longer but I think 30,000 would be the max between changes.

 

[unDummy]

This link has a CST to SUS calculator: http://neptune.spacebears.com/cars/stories/margins.html

 

[The Critic]

The fluid is fine. Yes, the viscosity is about 5.5cst, but the new Dexron-VI fluid will start out at 6.0cst and still provide good anti-wear protection. However, Dexron-VI and MerconSP, as well as many of the newer low viscosity fluids, will remain very stable throughout their life viscosity wise. It's unlikely that the fluid will thin beyond this. Instead, it'll slowly oxidize and thicken back near its starting viscosity eventually.