Question: Amsoil Torque Drive in the cold weather.

mplteddy

mplteddy

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Jul 10, 2007
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www.mplmotorsports.ca
It's been cold here this last week...sometimes hitting -31F. Anyway, I had three truck all running torque drive that spit fluid out of the transmission vent when first started, two stockers and one suncoast 3. Any ideas why? So far no complaints on trucks with Dex 6. The one truck spilled almost 2 litres. At first I thought it was maybe overfull, but it wasn't. Just wondering maybe if the amsoil is too heavy at these temps, we could see a lot of this over the winter. So I thought I should get some answers for my customers, because I have a pile of trucks out there all running it. Thanks
 
Noreaster

Noreaster

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I looked on Amsoils site & only thing I could find relating to cold weather was the Pour Point °C (°F) (ASTM D 97) -55c (-67f)
 
coldLBZ

coldLBZ

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Amsoil Torque Drive ATF
Brookfield Viscosity (-40C) - 8411
Pour Point -55C / -67F

Transynd
Brookfield Viscosity (-40C) - 8400
Pour Point -55C / -67F

Dexron VI
Brookfield Viscosity (-40C) - 12030
Pour Point -54C / -65F

Maybe someone smarter than me can put these numbers to better use.
 
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LBZ

LBZ

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Ted, did these trucks have the updated TCM tunes in them from GM to prevent the overheating issue when the truck is in warm-up mode? I think this may have only been in the 6-speeds though.

coldLBZ said:
Amsoil Torque Drive ATF
Brookfield Viscosity (-40C) - 8411
Pour Point -55C / -67F

Transynd
Brookfield Viscosity (-40C) - 8400
Pour Point -55C / -67F

Dexron VI
Brookfield Viscosity (-40C) - 12030
Pour Point -54C / -65F

Maybe someone smarter than me can put these numbers to better use.
Click to expand...

Not that I am smarter but I have worked with a Brookfield before. Basically, the brookfield measures the torque required to spin a dip-in style spindle which is pushed up against the bottom of a metal cylinder full of liquid. The torque,rpm of the spindle, and temperature of the fluid result in a number. This number is a viscosity rating.

Basically, the numbers above are saying that Dexron VI has a higher resistance to flow than Amsoil and Transynd at the same temperature. Meaning, while the pour point (the lowest temp a fluid will still flow out of a cylinder) is the same for all three oils, the resisitance to flow at a set temp-which in this case is -40C, is higher with the Dexron.

I have a thought on why this issue with the oil may be happening, but I will wait for the expert's 2 bits first!
 
LBZ

LBZ

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Keep in mind, the viscosity of a fluid can double with as little as a 5 degree celsius temperature change!! Viscosity does not stay constant in lubricants.
 
coldLBZ

coldLBZ

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LBZ said:
Ted, did these trucks have the updated TCM tunes in them from GM to prevent the overheating issue when the truck is in warm-up mode? I think this may have only been in the 6-speeds though.



Not that I am smarter but I have worked with a Brookfield before. Basically, the brookfield measures the torque required to spin a dip-in style spindle which is pushed up against the bottom of a metal cylinder full of liquid. The torque,rpm of the spindle, and temperature of the fluid result in a number. This number is a viscosity rating.

Basically, the numbers above are saying that Dexron VI has a higher resistance to flow than Amsoil and Transynd at the same temperature. Meaning, while the pour point (the lowest temp a fluid will still flow out of a cylinder) is the same for all three oils, the resisitance to flow at a set temp-which in this case is -40C, is higher with the Dexron.

I have a thought on why this issue with the oil may be happening, but I will wait for the expert's 2 bits first!
Click to expand...

Please share Dale, my truck's leaking again. :D
Edit: A little late but I'm also running Torque Drive.
 
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