I've read many posts the last three weeks trying to determine the source of a dull popping sound I can both hear and feel in the floorboard. I was hoping I could figure it out without having to start my own thread but alas, here I am. It actually seems to be coming from the middle of the chassis somewhere. The best I can describe it is as if something is shifting around (bushing, spring perch?). Truck is completely stock and I've noticed no difference in the way it drives with this pop. It started a couple of days after I rotated my tires which I believe is just a coincidence. At any rate, I pulled the front tires again and reinstalled for good measure.
It wasn't too bad at first and then became more pronounced. This past Sunday, it was popping even on the highway when I would hit small ridges in the road @ 60 mph, driving to my late Grandpa's farm for some fishing. The washed out dirt road back to his farm pond drove it crazy (caught a lot of fish in case you were wondering). Since I've been back in the city, almost no popping. It's very sporadic. I also thought it may be an engine miss traveling down the frame but have ruled that out.
I've been under the vehicle several times and have put a wrench on every nut and bolt I can find and have read about. Everything is tight (caliper bolts, knuckle studs, sway bar mounts, control arms, shock mounts, body mounts, steering stabilizer, etc). I've checked the rear too. The sway bar mounts are not broken where they meet the frame. Axle rebuild in November 2009. The wheel bearings are tight. No 12-6 play. I check the wheel bearings regularly and pre-load remains in the 9-10 range. Pulling hard on a pry bar under the tire yields no movement. My driver's side TRE may be getting close to having some movement but I've really got to shake the wheel very hard at 3-9 to feel even the slightest movement. I don't think this is the problem.
At this point I'm almost thinking it may be in the driveline. I recently greased the drive shafts but had trouble getting grease into the front slip yoke. Possibility? I get no driveline pop or clunk when I pull away from stop signs however. Motor mount? Just throwing out ideas.
Thanks in advance,
Mark
It wasn't too bad at first and then became more pronounced. This past Sunday, it was popping even on the highway when I would hit small ridges in the road @ 60 mph, driving to my late Grandpa's farm for some fishing. The washed out dirt road back to his farm pond drove it crazy (caught a lot of fish in case you were wondering). Since I've been back in the city, almost no popping. It's very sporadic. I also thought it may be an engine miss traveling down the frame but have ruled that out.
I've been under the vehicle several times and have put a wrench on every nut and bolt I can find and have read about. Everything is tight (caliper bolts, knuckle studs, sway bar mounts, control arms, shock mounts, body mounts, steering stabilizer, etc). I've checked the rear too. The sway bar mounts are not broken where they meet the frame. Axle rebuild in November 2009. The wheel bearings are tight. No 12-6 play. I check the wheel bearings regularly and pre-load remains in the 9-10 range. Pulling hard on a pry bar under the tire yields no movement. My driver's side TRE may be getting close to having some movement but I've really got to shake the wheel very hard at 3-9 to feel even the slightest movement. I don't think this is the problem.
At this point I'm almost thinking it may be in the driveline. I recently greased the drive shafts but had trouble getting grease into the front slip yoke. Possibility? I get no driveline pop or clunk when I pull away from stop signs however. Motor mount? Just throwing out ideas.
Thanks in advance,
Mark
Those mounts are pretty wimpy and it's not obvious until they break. Then bad sh!t happens (like broken brake and ABS lines).
