Optimal Tranny temp?
Postmaster
Joined: Nov 2004
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From: New Hampshire
maybe my mule isn't "NORMAL"... but... in 90* heat and humid.. not towing, i run around 140* or so... ambient plus 50* - 60* is about what i see... i have added a big tru-cool to the stock coolers... now... i know you can run the temp up to 250*, but i don't EVER want to get my tranny that hot...
Posting Guru
Joined: Jul 2003
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Something important is going on in there. It's a cooler for the trans.
If it is plugged, then it needs to be replaced or bypassed. If it is bypassed you might not have enough cooler, especially at low speeds and when backing.
Try repeating the test with the radiator cooler out of the circuit. If it flows more, you've found your problem.
If it is plugged, then it needs to be replaced or bypassed. If it is bypassed you might not have enough cooler, especially at low speeds and when backing.
Try repeating the test with the radiator cooler out of the circuit. If it flows more, you've found your problem.
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Junior User
Joined: Jan 2005
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Thanks again casey! I took a look at the system after i got home tonight, and the tranny was hot. about 215. it seems the return line is hotter than the line exiting the transmission. I'll have to inspect closer tomorrow when its light out!
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Junior User
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this truck had front end work on it done a while back the radiator and everything up front were pulled, is it possible the cooler lines were put back in the wrong order. What order should the coolers be in?
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Junior User
Joined: Jan 2005
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Originally Posted by Casey
From the front of the trans to the radiator, then to the aux cooler, then to the rear of the trans.
I'll get this put back in the right order and see what happens!
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From: South Dakota
You should also consider doing a tranny flush/filter change if you haven't already, especially before you slap on any extras.
Most peeps follow a 30K mi interval, but if you tow alot, I'd go 15-20 K mi.
I rarely see over 170F at 75mph unloaded on triple digit days, and I only have a stock system.
Even towing, I've never seen it go over 180F.
Most peeps follow a 30K mi interval, but if you tow alot, I'd go 15-20 K mi.
I rarely see over 170F at 75mph unloaded on triple digit days, and I only have a stock system.
Even towing, I've never seen it go over 180F.
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