How hot is too hot for Allison transmission?
Temperatures from 230-240 have been reached with no damage to the transmission. If you are seeing temps above 225 degrees on a regular basis you should check your fluid level. Fluid levels to high may cause excessive temperature.
What temperature should a 6.6 Duramax run?
Anything under 235 is normal temp for these engines, and is where they are designed to run. As for the trans, anything under 220 or so is fine. Even 220 isn’t bad if your towing. if it has the factory DEX VI in it, it is good to around 235-240 without much breakdown.
Why is my Duramax running hot?
Despite these issues, a majority of LLY Duramax overheating is actually caused by other common LLY Duramax problems. Blown head gaskets, water pump failure, fan clutch failure, and even a dirty or clogged radiator can be the root cause of your overheating issues.
How hot is too hot for Duramax?
250* for the “hot” engine warning. 255* for the “very hot” engine warning. As far as the tranny, you are not going to hurt an allison by running it hot.
What should the transmission temp be in a Duramax?
If you own a 2001-2004.5 LB7 Duramax your normal operating temperatures will run around 160-180 degrees. These transmissions will warm up when towing or driving in the summer months. 200-225 is very common when the ambient air temp is 80-100 degrees and your transmission is under an increased load.
What kind of transmission does a Duramax pickup have?
Nearly all Duramax powered pickup trucks were equipped with the Allison 1000 automatic transmission, with the five-speed version running from 2001 to 2005, and the six-speed starting in 2006 and running until 2019.
What causes a Duramax diesel engine to heat up?
When the engine is working hard, the turbocharger is drawing in a ton of air, and the restrictive stock turbo inlet tube can effectively choke the VGT turbocharger causing the compressor outlet temperature to skyrocket, heating up the intercooler, and ultimately raising the temperature of combustion and the coolant temp.
What should the temp of an Allison Transmission be?
How hot should your Allison transmission run? If you own a 2001-2004.5 LB7 Duramax your normal operating temperatures will run around 160-180 degrees. These transmissions will warm up when towing or driving in the summer months. 200-225 is very common when the ambient air temp is 80-100 degrees and your transmission is under an increased load.