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What Should Trans Temp Be + -
- Thread starter GNERGY
- Start date
I've seen 175-225 and I've also seen keep the temps under 190 and above 140.
DEMON44
Low-Tech Redneck
you don't want the temp sensor in the lone after the coolers. who cares what that temp is. you want it in the hot oil line going TO the coolers. thats the temp the tranny is operating at. thats the temp you should be concerned with. keep it under 200 for long life.
BILTIT
1/2 ton status
Tranny oil breaks down at ~270F, normal op temp is 150-240F.
When temps exceed that does that show that damage is occuring, or that damage is already done?
h0wl0ngcanitbe
1/2 ton status
That chart can be a little deceiving. Keep in mind that is the approximate length of time the trans would last if you ran it at that consistent temperature non-stop. Just because the temp spikes to 250 for a minute or two here and there doesn't mean the transmission life is suddenly decreases to 20,000 miles.
Generally, rather short spikes (like pulling a grade) do not cause long-term issues up to a certain temperature. Sure, the fluid can start to break-down at certain temps. but it does take a little while. If you are seeing these issue then change the fluid and everything should be good to go. Of course there is a temp you can get to that will start causing permament damage to the seals and clutches even at short spikes.......but it's not like the trans will be running at 160 and suddenly spike to 300 in a heartbeat, if you hit 300 than it's likely been running pretty hot for quite awhile anyway.
Generally, rather short spikes (like pulling a grade) do not cause long-term issues up to a certain temperature. Sure, the fluid can start to break-down at certain temps. but it does take a little while. If you are seeing these issue then change the fluid and everything should be good to go. Of course there is a temp you can get to that will start causing permament damage to the seals and clutches even at short spikes.......but it's not like the trans will be running at 160 and suddenly spike to 300 in a heartbeat, if you hit 300 than it's likely been running pretty hot for quite awhile anyway.
With the 700R4 i like anything between 160-200. My trans runs right at 180 unless i'm pulling a hill then it goes up anywhere between 190-210 but drops immediately after cresting the hill and on my way back down
