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Discussion Starter · #1 ·
I just bought an 05 3500 and yesterday i hooked to a trailer. Pretty heavy about 18000 lb trailer load. The previous owner had installed a Hot line kit from diesel manor on the truck and on a gradual take off within about 200 yards the trans temp gauge was sitting on 280. so of course i pulled over to let it cool down and it took several minutes for the gauge to even come down off 280. The truck is stock and i do not want to do anything that will cause me any problems down the road. the line is run directly off the tranny before it the fluid gets to the cooler and is not in the pan. Is this temp normal, i would like to think so but i dont think it is. Next is there any sugestions besides selling this truck and going back to a manual. Unfortunatly i am already missing my nv4500, i never though i would say that.
 

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What are the trans temp readings when cold, cruising empty, etc. That is certainly too high. The hot line to the cooler is the best place to get readings, but yours do seem very high.
 

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Stock trans and that weight, yeah that would be an expected temp. Thats a LOT of weight to get rolling and you ar ein fluid coupling so temps will climb.

Its not excessive and ATF+4 will handle it as long as it will cool back down around 200 when you get into lockup and road speeds. If it stays well over 200 going down the road you have a trans issue.

You might want to start that load out with manual first or your gonna break something. Manual 2nd will lockup the TC also and help with the temps.
 

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Discussion Starter · #5 ·
Thanks for the replies. I do not have any pictures but all it is is the trans line that runs to the cooler is cut and a fitting installed that will accept the temp sending unit. You could pull yours off and take it down to the farm store and they could press the hose fittings on.
 

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Oh ok, i know which one you are talking about. Do you know anyone with a scanner, if you do. get that gauge hot then plug the scanner if to see what it reads. you sender or gauge could be off
 
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