pbjavis18

okay so i have read a couple other post on here regarding this issue but mine seems to be a little different. 07 XLT Scrw 4x4 just rolled 100k miles. at 1000-1200 rpms at 45-50mph while in overdrive, when slowly increasing speed the truck begins to shutter,Bump, etc. once i get over 50mph or so it goes away with no further issues. no codes are thrown, no indications from exhaust. Ive read about a possible misfire or even a sensor E-clip in the trans. anybody seen the same thing? thanks for your help

Bamadude

Is it shifting hard?

Especial86

iTrader: (1)

Definitely sounds like a misfire... If you can give the truck a little extra gas to not experience this "shutter", then its a misfire... I bought my truck with a misfire "cheaply" and it was doing the exact same thing.... Hopefully you will get a code to check that will point you to the affected cylinder. Mine turned out to be a coil, and an exposed coil wire was arching on the valve cover. It is what killed the coil (COP)

pbjavis18

no the truck runs fine all through the gears. this bump i speak of is pretty hard. honestly feels like something is coming apart. the entire truck shakes pretty violent, then goes away

pbjavis18

oh and its multiple bumps. bump bump buuuump bump bum clears best way i can desrcibe it on here

Especial86

iTrader: (1)

Does it feel like your driving over a washboard?

pbjavis18

yeah pretty much

Especial86

iTrader: (1)

then its probably a misfire bro... They can feel like the transmission is gonna fall right out of the truck...

pbjavis18

thanks for your help, but my next question is if it was a misfire, wouldn't i see this at various speeds and rpm's?

LUVmyDUX

Yeah, as stated previously, misfire and symptoms of coil pack going bad.