Allison transmission high oil temp concerns
Finished a trip last weekend and noticed tranny oil temp nearing the red zone on my 2004 silverado. Now, a few weeks ago, we did drive through a big swarm of gnats that really coated the front of truc...
Forum Discussion
The OEM fluid - DEX VI is a synthetic base fluid
I would change (drain and fill) the tranny fluid with a TES 295 fluid (Fully Synthetic fluid):
AN = "Allison Number"
First 2 Digits = Year of Approval
3rd Digit = Fluid Type (1=TES-295)
Remaining (3) digits = sequence number (order of approval)
AN-011001 Castrol Heavy Duty Lubricants---- TranSynd
AN-031002 BP Lubricants---- Autran Syn 295
AN-031003 BASF Corporation---- Emgard 2805
AN-031004 International Truck & Engine Company----Fleetrite Synthetic ATF
AN-051005 ExxonMobil Lubricants and Petroleum Specialties Co---Mobil Delvac Synthetic ATF
AN-071006 John Deere & Company---- HD SynTran
AN-1010007 Mack Trucks, Inc ----Bulldog Synthetic ATF
AN-121009 Case New Holland---- CNH HD Synthetic ATF
AN-121008 Shell International Petroleum Co. LTD.----Shell Spirax S6 ATF A295
I found this:
“General Motors’ in-house towing team expert provided RV Clinic with this statement: The maximum allowable automatic transmission fluid temperature is dictated by the transmission oil itself. The oil begins to degrade significantly above 270 degrees Fahrenheit, so we design vehicles so that in all but the most extreme conditions, the fluid temperature in the transmission sump stays below 270 degrees F.
We allow for up to 285 degrees F in extreme conditions (i.e. towing a trailer with combination loaded at GCWR in Death Valley). But for customer usage anywhere else in the country, even at GCWR, transmission sump temperature should stay well below 270 degrees F. Above this point, certain internal components, such as seals, begin to disintegrate rather quickly. Although newer synthetic fluids can withstand higher temperatures we still recommend this (270F) as a maximum temperature. "
"newer synthetic fluids" - TES 295 approved
I would change (drain and fill) the tranny fluid with a TES 295 fluid (Fully Synthetic fluid):
AN = "Allison Number"
First 2 Digits = Year of Approval
3rd Digit = Fluid Type (1=TES-295)
Remaining (3) digits = sequence number (order of approval)
AN-011001 Castrol Heavy Duty Lubricants---- TranSynd
AN-031002 BP Lubricants---- Autran Syn 295
AN-031003 BASF Corporation---- Emgard 2805
AN-031004 International Truck & Engine Company----Fleetrite Synthetic ATF
AN-051005 ExxonMobil Lubricants and Petroleum Specialties Co---Mobil Delvac Synthetic ATF
AN-071006 John Deere & Company---- HD SynTran
AN-1010007 Mack Trucks, Inc ----Bulldog Synthetic ATF
AN-121009 Case New Holland---- CNH HD Synthetic ATF
AN-121008 Shell International Petroleum Co. LTD.----Shell Spirax S6 ATF A295
I found this:
“General Motors’ in-house towing team expert provided RV Clinic with this statement: The maximum allowable automatic transmission fluid temperature is dictated by the transmission oil itself. The oil begins to degrade significantly above 270 degrees Fahrenheit, so we design vehicles so that in all but the most extreme conditions, the fluid temperature in the transmission sump stays below 270 degrees F.
We allow for up to 285 degrees F in extreme conditions (i.e. towing a trailer with combination loaded at GCWR in Death Valley). But for customer usage anywhere else in the country, even at GCWR, transmission sump temperature should stay well below 270 degrees F. Above this point, certain internal components, such as seals, begin to disintegrate rather quickly. Although newer synthetic fluids can withstand higher temperatures we still recommend this (270F) as a maximum temperature. "
"newer synthetic fluids" - TES 295 approved
