Postby Strugglerzinc » June 22nd, 2010, 9:01 pm
I know you got it from Castrol but you need to do some reading on the characteristics of the Dexron III vs ATF+3/4
The +3/4 has higher friction characteristics than the Dexron which should theoretically result in smoother shifting. Doing the reverse ie. Dex III in a tranny requiring ATF+3/4 can cause slippage issues.
Here's a small copy and paste.
The chemical reports of these two fluids, are:
DEXIII:
Viscosity: 201 (indexed): @40C - 34.70 : @100C - 7.70
ATF+3:
Viscosity: 200 (indexed): @40C - 33.70 : @100C - 7.60
To Compare;
Redline Race ATF:
Viscosity: 177 (indexed): @40C - 53.70 : @100C 10.00
In your transmission, the difference (if you could even tell) is when it shifts & how hard it shifts. Just stick with a good name brand and your car won't know the difference.
*NOTE: Dexron VI is NOT compatible with any other fluid on the market, do NOT attempt to use Dexron VI in a transmission that does not call for it, or vise-versa.
From Castrol's website
Here's Dex III
Viscosity@ 40°C, 38.1
Viscosity@ 100°C, 7.9
Viscosity Index 186
Color, Typical 7.0
Appearance Red
Brookfield Viscosity @ -40 C, max, 17,000
Pour Point, °F (°C) -45 (-43)
Flash Point, COC, min °F (°C) (177)
Specific Gravity, 60°F 0.863
Pounds per Gallon 7.19
ATF+4
Viscosity@ 40°C, 33.0
Viscosity@ 100°C, 7.5
Viscosity Index 206
Color, Typical 7.0
Appearance Red
Brookfield Viscosity @ -40 C, max, 10,000
Pour Point, °F (°C) NA
Flash Point, COC, min °F (°C) 374 (190)
Specific Gravity, 60°F 0.850
Pounds per Gallon 7.08