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my new 05 6L powerstroke works great except when i pull a 16,000lb fifth wheel up steep grades the engine temp guage either goes just below or to the red and emediately i hear the fan clutch engage like a jet engine and the temp emediately drops to normal, this continues to cycle until i crest the hill, it never does this except for very steep hills and the trany temp stays at normal. ford says it wasnt overheating and they aware of the problem and they are working on a solution? anyone having this problem
thanks for the reply, the trany temp never moves at all, my worry is that if the gauge is correct and its hot enough to go into the red it is frying things like thermostats and sensors etc and not good for the engine, i asked ford why the fan clutch waits until its in the red to engage and they said the computer says its not actually overheating but they dont know how to make the fan clutch engage sooner as the system isnt like the old mechanical fan clutches, they are now computerized, i sold my 96 powerstroke because it wouldnt pull my new 34' fithwheel as it is 4000lbs heavier than my old one. i can pull this new 16,000lb one up steep long hills at 65mph. with the towmode engaged and the integrated brake controller i can go down long steep grades with little or no braking and the transmission does all the work. this truck so far is all i hoped it would be, i pull the 5th wheel 5 months a year and needed a new strong truck, so far so good
Last edited by tom in las vegas; Oct 29, 2004 at 01:57 AM.
Sounds good Tom, If the trans guage never goes up, I would ask the dealer to check the accuracy of your temp guage. It sounds like the fans are doing their job. Ask what temperature the fans are set to come on at... that will give you an idea of what the temp guage is showing at that point..in real numbers.
If you pull that much, you might consider getting a set of aftermarket gauges to monitor EGT, tranny, and engine coolent. I understand that the '05 already has a boost gauge built in.
On my '03 I can tow up a mountain and never see the tranny gauge move but my after market gauge will move from 165 to 195 or 200. The highest that I've ever seen it go was actually in stop and go traffic on the I-15 North and it hit 205 deg.
The factory tranny gauge will move from off the cold peg at around 80 deg and will be mid range by the time the tranny reaches 130 or so. So the factory gauges are really nothing more than window dressing idiot lights on my '03. If the tranny really gets hot, the gauge will probably sit there until it is almost in the danger zone and then jump from mid range to pegged hot in a very short time.
I tow a little less weight with my 34' 5th (@14,ooo lbs.wet) wheel and yes,the condition you describe while pulling up a steep grade is what my truck does(engaging the fan and making that loud whirring sound) but not the overheating.
I suspect maybe a problem with the temp gauge.
You good always try to rig up a temporary 2ndary temp gauge and try to monitor the difference.
Good luck since i doubt Ford will be as concerned as you are.
I tow a little less weight with my 34' 5th (@14,ooo lbs.wet) wheel and yes,the condition you describe while pulling up a steep grade is what my truck does(engaging the fan and making that loud whirring sound) but not the overheating.
I suspect maybe a problem with the temp gauge.
You good always try to rig up a temporary 2ndary temp gauge and try to monitor the difference.
Good luck since i doubt Ford will be as concerned as you are.
LOONATIC, Do you tow with an F250 dually? If you use a SRW, tell me what you think your wet pin weight is and how it tows. Thanx.
i tow with a 2005 superduty f250 srw crew cab long bed, the king pin wt is about 2300lbs, it tows great, my truck is level after i load it, i used to tow with a 96 srw powerstroke and a 3000lb lighter 5th wheel, the 96 didnt like this new 16000lb 5th wheel so i got the 2005 powerstroke, what a difference!!! this new 5th wheel has an 8 foot ceiling all the way back so i have more side area for the wind to push around but the new truck pulls it fine and i dont notice any difference in handling. i talked to a friend who is the service manager at a ford dealer and he confirmed the 2005's have got a problem with the water temp gauge going to hot and emediately returning to normal when the fan clutch engages, as the water temp cannot be reduced this quickly its a program error and they said the computer shows that the motor is not overheating at all. he also said the transmission temp gauge is like a 3 position gauge: normal, yellow for getting hot and telling you to stop what your doing and red for you are frying things. he says they are working on a solution which should be reprograming the computer.
TOM in VEGAS.....where I am currently at......WELCOME to the site, please read the Guidelines… Check out the list of forums and make sure you read the headings and Read First: notices in each forum.
my understanding was that Ford use mechanical gages. How computer can influent what these gauges show? It looks that Ford does not have solution and for now the easiest way is to say: yeah new re-flash will solve your problem.
Anybody else seen the same problem? Keep us informed…
Same problem here. I have a 32ft 5th wheel weighing in around 13,000 lbs. First time towing trailer up short, steep, grade the fan kicked on and the temp gauge ran to the top and immediately returned to normal?