Hawthorne wrote: . . .These trucks need to be worked, not just run, regularly. . . .
Here is 13,000 pounds of truck and camper going up hill for an extended period of time:
After awhile, a strange noise starts that sounds like a "straining noise".
Is this over-working it? Or is it just in the working range?
I've often wondered what that noise is too..sounds like a roar of something coming on at regular intervals. My 13,000 pounds of 5th wheel wouldn't be coming anywhere close to 65mph.
I really haven't noticed any roar in mine. I watch my gauges and, as long as they are showing normal readings, I keep on going. The fan theory sounds realistic though.
Just the 3 of us...SpoiledRotten, TotallyRotten, and ALittleRotten
2000 F-250 Lariat, CC
7.3 PSTD-Superchipped
2005 33RL2 New Vision - AKA "SpoiledRotten"
2000 Jeep Wrangler Sahara Edition
lv2rom wrote: The "straining noise" is probably your radiator cooling fan kicking in. It's usually more like a roar but we all hear things diffeently...Brian
I agree, cooling fan. I get the same thing. Just the nature of the beast. I guess if one is "working" the truck hard and you don't hear that roar, then it's time to keep a closer eye on that temperature gauge and have the automatic fan checked.
See you out there,
Robert
'05 Ford F250 Crew Cab, PSD, 4X4, Short Bed, Camper & Tow Package, Limited Slip Differential
'05 CrossRoads, Cruiser 29RK
PullRite 16K SuperGlide
Most likely the fan kicking in plus some turbo whistle might be in there also. I would put a EGT gauge on there if you make a habit of going up long uphills.
I agree could be the fan. Other thing came to mind is the converter locking up and putting a little more torque though the drive train & associated bearings, keepers, etc.
RPM & Boost look OK to me; Boost might be a little low. Depends on your throttle position. If your wide open, the boost should be bumping up against that red-zone - 24-28 lbs.
I would want to be monitoring EGT as well. On a hot day at those power settings and all in, I can get 1250 degrees, at which point I back out or down-shift (Mine 6-spd). I'd do a tranny gauge as well, that cluster gauge is a glorified Idiot-Light.
Cheers.
2004 Ford SRW 6.0 PSD, Gauges, Ranchos, Airbags w/ Cab Controler, 4400lb Rear Springs, Torklift Superhitch & TieDowns,
19.5” Visions w/ 265 Hankook DH01's
2003 Lance 1030, Air, Gen, Etc.
I want to know how the heck you're getting 11mpg under those conditions!! Same conditions I'll get about 8, sometimes even a little less. If you do find anything wrong with your truck would let me know so I can break mine?
You need to quit trying to keep up with me...its not going to happen, Ever..!
05 Dodge Ram 2500 QC SWB 4x4 Laramie.
Firestone air bags, Super Springs, Helwig sway bay, Rancho 9000's, Reese tow beast, MagHyTec diff covers, Toyo Open Country 285/70/17's, Numerous Performance Mods.
bigjimcrusing: that's 11.2 mpg average. . .it probably gets about 6 mpg when climbing at speed.
The straining noise seems to be related to how much throttle is used.
Less noise when backing off, more when stepping on it.
I have an mp3 player that can record. . .it might be awhile until the next mountain climb, but I'll try to get a recording of it and see if it can be identified.
Glad to hear no one say that it's anything serious.
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