Driveline shudder or vibration.
#11
My truck does not have a carrier bearing. The driveshaft comes out of the transfer case and goes into the rear diff so I am not sure about movement. I am going to pull my rear driveshaft out this weekend and check everything real good and if I do not find anything I'm going to put it in 4 wheel high and drive it without the rear driveshaft and see if anything changes. If I do not come up with something obvious I am going to take it in. I think it is something with the transmission control module not telling the system what and when to do it. I will keep you informed.
#12
Ok, this weekend I put my truck on stands and spent hours looking under it. I checked engine mounts , trans mount. I pulled the driveshaft and checked the u-joints very closely. I checked numerous bolts for being tight and any play where it shouldn't be. I came up with nothing. I pulled a small boat yesterday and now noticed a patterned hesitation that makes the tach needle jump 100-200 rpm's. The engine will surge a little then drop back to normal. It does this in a very predictable pattern when the rpm's are between 1500 and 1800 or so. I am now thinking it is a throttle position sensor but I do not have a engine light on. I am going to price one today and I if is reasonable I am just going to change it and see what happens.
#13
It's interesting, I'm now thinking, like you, that the 'shudder' may be engine driven. I actually hooked up my go pro on the crossbeam, looking at the carrier bearing and went for a little drive. Saw zero movement. Nada. That's not to say that there isn't a problem there, I just can't pick it up on the GoPro. I also can't find anything wrong with the u joints, the bearing, nothing. All seams nice and tight... ?
Going to be reaching out to the dealership this morning, and getting a definitive answer on why they said the drive shaft was bad...
Until then, I'm going to be looking into cleaning the TB, checking the MAF, and looking into the TPS as well. My tach has always kind of 'clicked' back and forth at certain RPM ranges. Usually by no more than 50 rpm or so, and I can't actually feel anything, but it could be an indicator of something else, you know?
Going to be reaching out to the dealership this morning, and getting a definitive answer on why they said the drive shaft was bad...
Until then, I'm going to be looking into cleaning the TB, checking the MAF, and looking into the TPS as well. My tach has always kind of 'clicked' back and forth at certain RPM ranges. Usually by no more than 50 rpm or so, and I can't actually feel anything, but it could be an indicator of something else, you know?
#14
#18
Roger that, thanks for the update. Interestingly, I pulled my boat out this weekend. As such, I disable MDS and kept the truck in TOW mode. Not a hiccup. Really beginning to think I need a transmission relearn, or there's some other issue. Can't find anything to support a bad drive shaft. Still, the saga continues...
#20