My 02 has developed a vibration that starts anywhere from 35 mph and continues up through 75ish (maybe at higher speeds too, but I don't generally drive faster than that). I noticed 2 cases - possibly unique...I don't know for sure:
Scenario 1: 4wd driving last night through the ice and freezing rain, the truck had a vibration/sort of bucking going on. I was doing about 38mph in 5th gear (6 spd), between 1400 and 1500 RPM in 4HI. Pushing the accelerator down, the vibration turned more into a buck. It felt as if the truck were fighting a stall similar to what would happen trying to accelerate in too high of a gear to start (i.e.,5th at 25mph). As the speed and RPM increased, the issue started to dissipate.
Scenario 2: Cruising from 45 mph and up (sometimes at 35 also) in 2wd. This feels more like a vibration than a buck as I described above. I can get the truck to do it in 5th or 6th gear, and I cannot associate it with engine load. This is typical of tire balance, but I feel this is more violent than an out-of-balance tire or tires. It feels more like a shake.
In both cases, the fueling electronics do not have to be on to get the truck to do it. The only codes I have are P0500 (VSS) and P1693. Fuel pressure is fine.
I have replaced a variety of parts already trying to solve the second issue, but I want to get some of your guys' input prior to me divulging what parts have not helped. I do not know if the first issue is related, but I thought I would mention it to see if anyone has chased this problem down before.
Scenario 1: 4wd driving last night through the ice and freezing rain, the truck had a vibration/sort of bucking going on. I was doing about 38mph in 5th gear (6 spd), between 1400 and 1500 RPM in 4HI. Pushing the accelerator down, the vibration turned more into a buck. It felt as if the truck were fighting a stall similar to what would happen trying to accelerate in too high of a gear to start (i.e.,5th at 25mph). As the speed and RPM increased, the issue started to dissipate.
Scenario 2: Cruising from 45 mph and up (sometimes at 35 also) in 2wd. This feels more like a vibration than a buck as I described above. I can get the truck to do it in 5th or 6th gear, and I cannot associate it with engine load. This is typical of tire balance, but I feel this is more violent than an out-of-balance tire or tires. It feels more like a shake.
In both cases, the fueling electronics do not have to be on to get the truck to do it. The only codes I have are P0500 (VSS) and P1693. Fuel pressure is fine.
I have replaced a variety of parts already trying to solve the second issue, but I want to get some of your guys' input prior to me divulging what parts have not helped. I do not know if the first issue is related, but I thought I would mention it to see if anyone has chased this problem down before.
