I have a 2003 Quad-Cab 4.7 4x4.
The problem I am experiencing is when I drive when it is below 25 F for more than 2 hours my truck will begin to randomly shift from 5th to 4th and back to 5th within a half second or so. Actually just enough to see the tach jump 500 rpm and the drop again. No warning lights and no codes when I hook up the reader.
I live in St Luis now, but originally from WI so I make trips up there often. I first noticed it last new years (@70,000 miles) but thought it was gasline freeze up as it was below zero all week. Then this year I went up and it was in the 20s. Same thing 2 hours into diving in the cold and it started again. Stop the truck and it does 500rpm-1500rpm flutter, shut it off, start it up and it idles great. Next day I fill up with WI gas and a bottle of Heat. It was 23 F, dive for 2 hours and it starts again. Soon as the outside temp reached 26 F (according to truck comp) it stopped and ran great.
Any suggestions or others with same experiences?
Josh
The problem I am experiencing is when I drive when it is below 25 F for more than 2 hours my truck will begin to randomly shift from 5th to 4th and back to 5th within a half second or so. Actually just enough to see the tach jump 500 rpm and the drop again. No warning lights and no codes when I hook up the reader.
I live in St Luis now, but originally from WI so I make trips up there often. I first noticed it last new years (@70,000 miles) but thought it was gasline freeze up as it was below zero all week. Then this year I went up and it was in the 20s. Same thing 2 hours into diving in the cold and it started again. Stop the truck and it does 500rpm-1500rpm flutter, shut it off, start it up and it idles great. Next day I fill up with WI gas and a bottle of Heat. It was 23 F, dive for 2 hours and it starts again. Soon as the outside temp reached 26 F (according to truck comp) it stopped and ran great.
Any suggestions or others with same experiences?
Josh
Runvs,
Thanks for the promising outlook. I actually just talked to my Mech, he seams to think the trany is fine. Just finished the inspection and said he thinks the RPM spikes were actually that RPM/Engine spikes and not the trany shifting. He said with my 4.11s I should have felt it shift down, as I normally can. But since I could not feel the surge what so ever (only see it on the tach) he said he is 99% sure it is not the trany.
Any one else heard of the 4.7 and 5.7 having different throttle bodies and injector jets for Nothern vs Sothern sold trucks?
Thanks for the promising outlook. I actually just talked to my Mech, he seams to think the trany is fine. Just finished the inspection and said he thinks the RPM spikes were actually that RPM/Engine spikes and not the trany shifting. He said with my 4.11s I should have felt it shift down, as I normally can. But since I could not feel the surge what so ever (only see it on the tach) he said he is 99% sure it is not the trany.
Any one else heard of the 4.7 and 5.7 having different throttle bodies and injector jets for Nothern vs Sothern sold trucks?
Veteran
Sorry, i would deff have the trans double checked i have 4'56's and mine was doing the same thing from 4th to 5th and turns out its supposedly toast... I hope you get it fixed GL
That's what I thought too weed, but did some more digging and did find quite a few postings one on this forum and half dozen or so on other auto forums with the same issue except they had a p2010 code or "Cold Weather" code. So I called a friend who works at the dealer we bought the trucks from and he looked it up and they do have a listing for a high altitude/low temp throttle body. Most people I saw having the issues bought trucks in SOCAL or Texas and moved to the mountains.
Quote:
Tell him I wanna part number on both.....Originally Posted by mjleedle
That's what I thought too weed, but did some more digging and did find quite a few postings one on this forum and half dozen or so on other auto forums with the same issue except they had a p2010 code or "Cold Weather" code. So I called a friend who works at the dealer we bought the trucks from and he looked it up and they do have a listing for a high altitude/low temp throttle body. Most people I saw having the issues bought trucks in SOCAL or Texas and moved to the mountains.
I dont believe that there is such a thing as 2 different T/B's as I have read through all of the TSB's. What i did find if i rmember correctly, was that anytime a customer had popped a cold weather code, the T/B was bad and needed to be replaced!
Cold weather would have nothing to do with the T/B itself but with the injuector pulse rate and the tune that controls the T/B open/close commands.
Cold weather would have nothing to do with the T/B itself but with the injuector pulse rate and the tune that controls the T/B open/close commands.