2002 Suburban, ticking noise while moving forward, transmission?
phoenixracer Member Posts: 4
edited March 2014 in Chevrolet
So a few days ago I guess this started and I'm really at a loss. Its getting a little worse now and I was going to take the truck on a little day trip tomorrow and now I'm not so sure. It sounds like a bearing tick when the bearing goes bad, but its coming from the middle of the truck (on the bottom around the driveline). Here are a few weird facts about the noise. It occurs in forward gears under medium / hard acceleration, its there under low acceleration but very quiet. Once you are no longer accelerating the noise goes away. It is directly linked to the speed of the vehicle, engine rpm, or transmission more specifically because if I am going very slow it is a methodical tick, and the last tick you hear is almost like a ttttiiiiiiccccckkkkk because of the speed. I mean, it really sounds like a freaking baseball card in the spokes of your bike. I do know that when it shifts gears the ticking stops and starts again to almost match the speed of the engine, not so much the speed of the vehicle. I'm trying to diagnose the thing, and I looked under the truck today while my wife was accelerating it very slowly and I just didn't see anything. All the body bushings are snug. Tranny mount, catylitic converter have no slop in them. Its not related to the A/C being on in the front or the back. The truck DOES have an autoride suspension in the back, but the tick sounds like it is coming from the mid point in the drive shaft, so perhaps where it connects to the transmission. I was thinking maybe that it needed grease, but the more I ponder it, the more I realize that it is linked to the speed of the engine and the strain, not the speed of the vehicle. I really think that this is drive train related between the tranny and the engine and I just hope the hell its not the torque converter... I do have 22" wheels, and they may be putting a load on the vehicle. However, it sounds ridiculous that this thing can tow 9000 pounds, has an auto ride suspension, and has been defeated by wheels and tires that are only about an inch bigger in diameter than the stock set up. I have a Vortec 5.3l, and the year is a 2002. Please someone, give me something to think about!!! 'Carl
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did not do it when I stalled the motor up.
pretty sure its a 1 peice shaft
i don't think i've gotten it all the way into overdrive since I have noticed it. if I had, and it does make the noise, its very faint. most noticeable in 1st and 2nd
I really HATE taking my stuff to car shops...