Differential care
#21
02-05-2012, 03:07 PM
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#23
02-06-2012, 05:46 PM
The "fill-for-life" statement generally applies to cars. For 4th geneneration Ram 1500 trucks using the 545RFE require a fluid and filter change at every 120,000 miles, unless operated in severe service, which then require fluid and filter changes at every 60,000 miles.
Regards,
Dusty
2010 Ram Big Horn 1500 Quad Cab 2WD, 5.7 Hemi, 545RFE, 3.92 LSD, dual exhaust, 20” wheels
#24
02-06-2012, 06:46 PM
I re-read Dusty's post, and according to
http://www.redlineoil.com/product.aspx?pid=53&pcid=9
It satisfies the Chrysler Type 9602 requirements
http://www.redlineoil.com/product.aspx?pid=53&pcid=9
It satisfies the Chrysler Type 9602 requirements
Viscosity Index (VI) reads better on the Redline product (213 vs. 201), but the viscosity of 7.5 centistokes at 100 C is the same for both, and 32 cST at 40 C is slightly less for the Redline(32 vs. 34), which is confusing. The Redline Pour-point, however, is rated better (-55 vs. -74), which is likely the result of using a group 4 base stock.
However, there's more to the story than just VI. The Redline product is not licensed so somewhere there's a difference. Redline doesn't say anything about their anti-foaming or anti-oxidation package and only implies clutch compatibility. Since the RFE series transmissions count clutch indexes electronically and adjust line pressure accordingly, for Chrysler transmissions especially the friction modifier is probably the most important element.
Both Valvoline and Mobil are licensed to produce and sell an ATF+4.
Regards,
Dusty
2010 Ram Big Horn 1500 Quad Cab 2WD, 5.7 Hemi, 545RFE, 3.92 LSD, dual exhaust, 20” wheels
Last edited by Dusty48; 02-06-2012 at 08:00 PM. Reason: Corrected statement about Chrysler ATF+4 VI, added availability of Mobil & Valvoline licensed product.
#25
02-06-2012, 08:29 PM
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Well, the Redline statement about a 1/3 reduction in evaporation seems moot since the Chrysler ATF+4 is fully synthetic. That statement only makes sense if you compare their product to conventional, non-synthetic fluids. Chrysler ATF+4 uses a group 3 base stock and Redline uses a group 4 Ester base stock, which is generally considered to be somewhat, if not marginally better.
Viscosity Index (VI) reads better on the Redline product (213 vs. 201), but the viscosity of 7.5 centistokes at 100 C is the same for both, and 32 cST at 40 C is slightly less for the Redline(32 vs. 34), which is confusing. The Redline Pour-point, however, is rated better (-55 vs. -74), which is likely the result of using a group 4 base stock.
However, there's more to the story than just VI. The Redline product is not licensed so somewhere there's a difference. Redline doesn't say anything about their anti-foaming or anti-oxidation package and only implies clutch compatibility. Since the RFE series transmissions count clutch indexes electronically and adjust line pressure accordingly, for Chrysler transmissions especially the friction modifier is probably the most important element.
Both Valvoline and Mobil are licensed to produce and sell an ATF+4.
Regards,
Dusty
2010 Ram Big Horn 1500 Quad Cab 2WD, 5.7 Hemi, 545RFE, 3.92 LSD, dual exhaust, 20” wheels
Viscosity Index (VI) reads better on the Redline product (213 vs. 201), but the viscosity of 7.5 centistokes at 100 C is the same for both, and 32 cST at 40 C is slightly less for the Redline(32 vs. 34), which is confusing. The Redline Pour-point, however, is rated better (-55 vs. -74), which is likely the result of using a group 4 base stock.
However, there's more to the story than just VI. The Redline product is not licensed so somewhere there's a difference. Redline doesn't say anything about their anti-foaming or anti-oxidation package and only implies clutch compatibility. Since the RFE series transmissions count clutch indexes electronically and adjust line pressure accordingly, for Chrysler transmissions especially the friction modifier is probably the most important element.
Both Valvoline and Mobil are licensed to produce and sell an ATF+4.
Regards,
Dusty
2010 Ram Big Horn 1500 Quad Cab 2WD, 5.7 Hemi, 545RFE, 3.92 LSD, dual exhaust, 20” wheels
Im more concerned with the Transfer Case fluid.
