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'03 2500HD Tranny Problems???

bigrobztrk

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bigrobztrk New Member

bigrobztrk

Posted
Posted

Hey guys...

 

Hope someone can help me out here with some concerns with my '03 2500HD. It has the 6.0 Vortech engine and the HD tranny, however I have noticed that lately the temperature guage is running higher than before. I've only had the truck for 11mos., however for the first 9mos. or so, the temperature never exceeded maybe 140F. It now consistently runs in excess of 175F under normal driving conditions (no loads, no towing, etc.). I am concerned with towing, due to fear of burning up the transmission prematurely. I've had it into the dealer, and they can't seem to duplicate the problem (??) You know how that goes! Well, I'm hoping I am just exaggerating my concern and this can be attributed to the break-in of a heavy duty transmission, however, I am still concerned. Hope you guys can: 1) tell me what I can expect for normal operating temperature on the 2500HD trasmission temperature gauge w/ no loads. 2) tell me if my condition is abnormal, some tips as to what I can bring to the dealer to convince them that this is a problem. Hope you guys can help!!!

 

Thanks,

Rob

Shotgun Enthusiast

Shotgun

Posted
Posted

Sounds to me like your right in the normal operating range. Thats about where mine stays ,closer to 200 when pulling my RV.

GONZO Enthusiast

GONZO

Posted
Posted

mine usually runs at over 150deg. even with camper on and trailer in tow it rarely will hit 200deg. the only time it went slightly over 200 for a short period was when i was climbing a slow speed mtn pass in wy at close to 10000ft with the truck right at the 16k gcvwr.... :flag:

KyleBst264 Enthusiast

KyleBst264

Posted
Posted

You having nothing to worry about, that is normal.

 

It's been alot warmer where I live lately than it has been in the past few months and I noticed my trans temp is running higher than it was a couple months ago.

Shaners Senior Enthusiast

Shaners

Posted
Posted

Mine has been running about 140* - 150* empty, and higher if I'm in town....

 

The biggest thing is that the tranny cooler is part of the radiator (yea I know there is an external cooler), but as long as the tranny temp isn't more than the coolant temp, then you should be OK...

 

 

I've noticed that once mine gets hot (200*) then it will not cool back down while driving....

whitesnake01 Enthusiast

whitesnake01

Posted
Posted

With 175F you have nothing to worry about.

 

Mine routinely runs in the 180-210F range when I tow a 8,000lbs trailer (93 454 with 4L80E and better than stock cooling). It also depends on outside temperature, elevation, if you are running with A/C, etc. I've had it reach 250F a few times on major climbs in hot weather. I run Amsoil full synthetic. Pan is dropped each year. Every three years I have a full flush done. Each year the pan filter is broken up on a workbench, to inspect for shavings and fine dust on the outside. So far so good. I've been doing this for many years. Full synthetic helps reduce the risk of failure under temperature. If mine held at 175F on a hot day while towing, I'd have my gauge inspected...

496 CUBIC INCHES Enthusiast

496 CUBIC INCHES

Posted
Posted

I wouldn't be too concerned. My tranny temp is usually about 175deg when moving and will climb to 200 when stuck in traffic. The highest mine has ever seen was about 210,when I was pulling our travel trailer up a steep gravel road for 11 miles. The road was so rough we could only go about 5mph,so there was no air flow over the cooler.

Mort Enthusiast

Mort

Posted
Posted

As everyone here seems to know heat is the enemy of transmission fluid. Once overheated the damage is permanent. So watch your heat and change your fluid accordingly. I thought everyone might be interested in this gragh I found at Performance Automotive and Performance Center http://www.transmissioncenter.net/TransTemp.htm. As you can see they have a cooler with its own fan which will work when there is little or no air moving through the rad. :flag:

 

My truck transmission guage now seems to run hotter than when the truck was new but is still quite low at 150 to 165* even when towing 5500 lbs.

 

All the best. :eek:

JimWilson Enthusiast

JimWilson

Posted
Posted

Mines running between 150 and 180 when I'm not towing. Depends a lot upon how hot and humid it is, if you're in stop-and-go traffic, how fast your traveling on the highway, etc. 175 isn't a problem though.

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