Hello everyone,
I'm new to the forum and I was hoping to get some ideas from you. I've got a 2005 F250 with the 6.0 and roughly 110k on the odometer. Today, as I was driving on the interstate, I noticed an occasional slight transmission surge or shudder as I was driving on the downward side of an overpass. Cruising speed was right about 75MPH with the cruise control on. This happened only occasionally and not very often. I did not seem to notice it when the cruise control was turned off and I had my foot on the accelerator pedal. Does anyone have any thoughts/ideas/prayers?
Does anyone have a clue as to what this could be? I've looked at TSB 06-22-6 but mine does the buck/jerk going downhill or in other words, coming off of acceleration while in cruise control. Not pulling anything, just empty at around 70-75 MPH. Could it be that the PCM needs the latest calibration?
Please help.
Thanks
Pete
I don't think that this is your transmission doing tricks on you.
I've had something like you mentioned before, but it didn't seem to bother me at that time too much, and since that I have all the motor and tranny work done, so I can't tell you by experience what it is, but I'd put my vote to some kind of injector trouble. If it is injector related, than the latest flash might help you some....
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'03 F250 6.0 Lariat CC LB FX4, 4" Turboback Stainless Exh., ARP Studs, EGR Delete, Banks High Ram Intake/ stock filter, SCT X3 Innovative Custom Xtreme Tunes , CCV reroute, Dieselsite Coolant filter, Fumoto valve, High Idle Mod, Autometer Boost, EGT, Fuel Press. gauges, Zoodad Mod, Suncoast 5R110 , 4" Pro Comp lift kit
Kong MKII Train horn w. 5 gal. air system
'57 Jeep CJ5 Willys "Original" / no mods
Possibly wrong tires on my truck may be the issue.
Thanks dcaddi2. I've got some new info that may or may not solve the problem. I purchased this truck used about a month ago. I was checking the tire pressures when I realized the following. The post on the door calls for 75 PSI on LT265/70 R17 tires. Three of the tires are Michelin P265/70 R17 113S M+S Radial X with max pressure noted on the tire to be 35 PSI. One tire is a BF Goodrich LT265/70 R17 118 R Load Range E with max pressure 80 PSI. All of the tires were between 40-45 PSI. Could this problem be caused by underinflated tires? Secondly, it seems that these may not be the correct tires for this truck, or can they be operated higher than 35 PSI? Do I need to get rid of all the tires and put the correct ones?
Any suggestions?
F-250 needs E rated tires to match the trucks ratings. 60 psi front and 75 psi rear. When was the tranny last serviced, flushed, needs to be done every 30,000 miles and external filter every 15,000 miles. I do mine every 10,000 miles cause I tow and it's cheap ins. for a 4,500 dollar trans.
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"05 F-250, 6.0, CC, LB, 3.73, Lariet, with coolant filter and Bilstein shocks, Magnefine p.s. filter, S. Ca.
"69 Mustang, Mach 1, 428 CJ, Ram Air, Stock
"71 Triumph Trident
2007 Thor Jazz 5er, 11k, 31'
173rd Abn.
AN f250 doesnt NEED E rated tires. It all depends on the size of the tires you buy, and what you use the truck for.
Tires pressures need to be adjusted accordingly to what you use the truck for also. An empty truck doesnt need the tires pumped up to the max or you will start wearing out the center of your tires. Another thing if you drive empty, pumping up your rear tires more then your front ones can give you a pretty bouncy feeling.
I have my own compressor and air gauges (and I used to work at a tire shop for a few years a few years ago) so i do alot of adjusting when needed to maximize the performance and life span of my tires.
I would get rid of the michelins if the max pressure they could hold was 35 psi though, go with an 8 or 10 ply, depending on your needs. Also make sure to get a good balance on them.
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$Sheldon$
2003 F-250 supercab shortbox 4x4 lariat
~Everythings legal man as long as ya dont get caught~
F-250 needs E rated tires to match the trucks ratings. 60 psi front and 75 psi rear. When was the tranny last serviced, flushed, needs to be done every 30,000 miles and external filter every 15,000 miles. I do mine every 10,000 miles cause I tow and it's cheap ins. for a 4,500 dollar trans.
Thanks 69CJ,
I do not know when the tranny was last serviced but the fluid looks to be fairly new as compared to having a lot of miles on it. I guess that I need to go ahead and change it anyway just to make sure.
Thanks again,
Pete
AN f250 doesnt NEED E rated tires. It all depends on the size of the tires you buy, and what you use the truck for.
Tires pressures need to be adjusted accordingly to what you use the truck for also. An empty truck doesnt need the tires pumped up to the max or you will start wearing out the center of your tires. Another thing if you drive empty, pumping up your rear tires more then your front ones can give you a pretty bouncy feeling.
I have my own compressor and air gauges (and I used to work at a tire shop for a few years a few years ago) so i do alot of adjusting when needed to maximize the performance and life span of my tires.
I would get rid of the michelins if the max pressure they could hold was 35 psi though, go with an 8 or 10 ply, depending on your needs. Also make sure to get a good balance on them.
Thanks peppypro,
The tire sizes are the P265/70 r17 which are the stock size. I purchased the truck used and I guess the previous owner put these on there. He never used the truck to pull anything but I, on the otherhand, have been using it to pull my boat and camper. Not long distances (less than 50 miles) but still towing.
The E rated tire is what came on my truck stock. If you derate your tires then you might as well have saved some money and bought an F-150. A lot of people cheat on their tires and luck out. A few aren't so lucky. However if you do derate them and then you need to haul or tow something heavy, you have put your self in that risk category. Do what you are comfortable with as long as you understand the consequences. Incidentally, the recommended tire press. is inside the drivers door and that is not the tires max. press.
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"05 F-250, 6.0, CC, LB, 3.73, Lariet, with coolant filter and Bilstein shocks, Magnefine p.s. filter, S. Ca.
"69 Mustang, Mach 1, 428 CJ, Ram Air, Stock
"71 Triumph Trident
2007 Thor Jazz 5er, 11k, 31'
173rd Abn.
The E rated tire is what came on my truck stock. If you derate your tires then you might as well have saved some money and bought an F-150. A lot of people cheat on their tires and luck out. A few aren't so lucky. However if you do derate them and then you need to haul or tow something heavy, you have put your self in that risk category. Do what you are comfortable with as long as you understand the consequences. Incidentally, the recommended tire press. is inside the drivers door and that is not the tires max. press.
What most people dont realize though, is unless you have the exact brand and size of tire as what came stock with on your truck from the factory, the tire pressure on the sticker means little, and you should actually follow the tire manufacturers reccomendations, not fords sticker anymore.
Also the larger sized tires you go, the more weight they can handle, meaning you dont always need that ten ply rating.
For example my truck came with 245/75/16s ten ply when I bought it. They were bf's all terrain tire. Max load rating (from tire racks website) is 3042 lbs. I bought some 17 inch rims and bought goodyears 285/70/17 silent armours, 8 ply, and they are rated at 3195lbs max load.
So its not ALWAYS about getting a d or e ply rating on the tire as you can see.
I do agree with you though about you really have to think ahead on how you are going to use the truck. With my 8 ply tires I did alot of highway driving, and little hauling or towing, but now I do alot of towing of a fairly heavy trailer, so when those goodyears wore out, i got a set of ten ply E rated tires due to the fact I needed them.
__________________
$Sheldon$
2003 F-250 supercab shortbox 4x4 lariat
~Everythings legal man as long as ya dont get caught~
What most people dont realize though, is unless you have the exact brand and size of tire as what came stock with on your truck from the factory, the tire pressure on the sticker means little, and you should actually follow the tire manufacturers reccomendations, not fords sticker anymore.
Also the larger sized tires you go, the more weight they can handle, meaning you dont always need that ten ply rating.
For example my truck came with 245/75/16s ten ply when I bought it. They were bf's all terrain tire. Max load rating (from tire racks website) is 3042 lbs. I bought some 17 inch rims and bought goodyears 285/70/17 silent armours, 8 ply, and they are rated at 3195lbs max load.
So its not ALWAYS about getting a d or e ply rating on the tire as you can see.
I do agree with you though about you really have to think ahead on how you are going to use the truck. With my 8 ply tires I did alot of highway driving, and little hauling or towing, but now I do alot of towing of a fairly heavy trailer, so when those goodyears wore out, i got a set of ten ply E rated tires due to the fact I needed them.
Don't want to argue and won't but if you read the press. on the side of the tire it says "Max Press" not recommended press. Vehicle Manf. sets recommended press. based on vehicle weight and suspension for the load it was designed to carry.
__________________
"05 F-250, 6.0, CC, LB, 3.73, Lariet, with coolant filter and Bilstein shocks, Magnefine p.s. filter, S. Ca.
"69 Mustang, Mach 1, 428 CJ, Ram Air, Stock
"71 Triumph Trident
2007 Thor Jazz 5er, 11k, 31'
173rd Abn.
Don't want to argue and won't but if you read the press. on the side of the tire it says "Max Press" not recommended press. Vehicle Manf. sets recommended press. based on vehicle weight and suspension for the load it was designed to carry.
Its just discussion man, not arguing
The manufacturers rating on the truck is for the specific tire, and size that comes with the truck. Once you change to a different model of tire or especially different size, then that vehicle rating is no longer the same, due to the fact that every tire out there is different.
I can tell you Ive done lots of tire warranty work for the local ford dealer (when I was a tire guy) and learned from them, and from the workshops I had to attend, that there is more to your tire pressures (and load ratings) then just following whats on the fuel filler door.
__________________
$Sheldon$
2003 F-250 supercab shortbox 4x4 lariat
~Everythings legal man as long as ya dont get caught~
Well guys, thanks for the input on the tires. What actually began with a transmission (like?) shudder has turned into a tire discussion. After reading your input and looking at the three (3) tires that I have, P265/70 R17 (with a max air pressure of 35 PSI) I have to admit that I'm slightly scared and ready to buy four new tires. One tire that is mounted on the truck is a 265/70 R17 E rated for max air of 80 PSI. I'm not comfortable with this and I'm going to change them all out when I get home come this Friday. I've always been a stock kind-of-guy. No lifts, no fancy odball wheels, no nothing. I always said that if something did not come that way from the factory then it's not supposed to be on there. I'm pricing out four BF Goodrich LT265/70R17E Trail T/A's.
Once again, thanks for your input.
I always said that if something did not come that way from the factory then it's not supposed to be on there.
Well, I'm pretty sure that a lot of us won't agree with that......
I could mention a couple of things what shouldn't be on the 6.0, and also a few things, what should be on/in it...
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'03 F250 6.0 Lariat CC LB FX4, 4" Turboback Stainless Exh., ARP Studs, EGR Delete, Banks High Ram Intake/ stock filter, SCT X3 Innovative Custom Xtreme Tunes , CCV reroute, Dieselsite Coolant filter, Fumoto valve, High Idle Mod, Autometer Boost, EGT, Fuel Press. gauges, Zoodad Mod, Suncoast 5R110 , 4" Pro Comp lift kit
Kong MKII Train horn w. 5 gal. air system
'57 Jeep CJ5 Willys "Original" / no mods
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