Quote:
Originally Posted by jks67ss396
Hey guys
Im trying to see if i have an issue with my 5.3/4l60 or not
this doesnt happen if the truck is in park and i just rev the engine, so i dont think its engine
When driving the truck, there seems to be a certain resonant frequency/rpm that i feel slightly through the dbw pedal when i get on it a little. its probably the whole truck, but i feel it more in the pedal instead of the carpeted floor.
its not so much of "uh oh, something is wrong" as more of a "hey this thing has some b@lls"
if i let off the gas, the slight vibration goes away, get back on it, it comes back.
but as i gain speed, it goes away
its a 2 piece driveshaft
Ive checked motor mounts, trans mounts, ujoint strap bolts, greased all ujoints, checked exhaust bolts (have those layered rubber isolator hanger straps)
trans fluid is new, new filter, correct fluid level, external cooler
is this something on trans? something with 2 piece shaft? normal?
i would expect this kinda vibration through a throttle rod connected big block or if i have a misadjusted throwout bearing on a mechanical clutch, but not a dbw 5.3
thoughts? or your own experiences?
thanks guys!
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Let me know when you find and fix it !!!
I have the "same" vibrations while driving, everything checks out OK, but I am still looking for the source.
I have a 1 piece DS and this come in at 1250 to 1350 RPM and is throttle controlled ,in and out, at around those RPM's
New exhaust twice pipes with a crossover and very conservative Walker Muffs
This is a new problem as I have had this truck for 30+ years and it was not there before the swap.
Thanks for bringing this up!