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Transmission fluid change question

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Old Feb 4, 2020 | 09:38 AM
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Transmission fluid change question

I would like to change the transmission fluid, following Mark K’s procedure. My question is, do I need to bring the trans up to operating temperature or can this be done cold, in 70* garage without warming up the trans temp? If the transmission needs to be warmed up I will have to wait until spring as I am not driving the truck on the salt laced white roads. My thought is since the engine is on and transmission pumping fluid, it should be fine doing this cold, but I’m not positive. Thanks in advance for any advice.
 
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Old Feb 4, 2020 | 03:14 PM
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Got 450,000 miles on my transmission and I never warm it up to operating temp to change it, but I am in N Florida. No real winter here!
 
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Old Feb 4, 2020 | 04:14 PM
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From what i know of those of you with autos, you have to have them running to check fluid levels. I would assume that also means @ temp, but most auto dipsticks I've seen have hot and cold lines on the stick.
 
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Old Feb 4, 2020 | 05:59 PM
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Originally Posted by Wes444
From what i know of those of you with autos, you have to have them running to check fluid levels. I would assume that also means @ temp, but most auto dipsticks I've seen have hot and cold lines on the stick.
I’ll have to keep that in mind. I am going to change the fluid soon while it’s cold. I will have to put a post it note on the steering wheel to remember to check the fluid level when I drive the truck in the spring.
 
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Old Feb 4, 2020 | 09:15 PM
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Let it run for a while before changing it. Run it in gear as opposed to park. That will warm it enough to change the fluid.
 
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Old Feb 4, 2020 | 09:23 PM
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Originally Posted by Mark Kovalsky
Let it run for a while before changing it. Run it in gear as opposed to park. That will warm it enough to change the fluid.
Thank you Mark, I can differently do that.
 
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