A Couple Questions

[GREASEMONKEY72]

i have a vibration between 35 to about 45 mph not before and not after anybody know what this might be???? and just so you know the u joints and carrier are fine i had them looked at and also the wheels just got balanced and i just had the front rotors turned and i still have the vibration is it just an old truck thing or what becuz i dont remember feeling it before and ALSO when i step on the brakes the truck pulls to the right i can let go of the wheel and i will go into the other lane and no i have not pulled the back brakes off to look yet but i should be able to tomorrow but any advice/comments are greatly apreciated and sorry for rambling

-steven

[chevybill]

The moving into the other lane sounds like a potential alignment problem.
Alignment could possibly cause the vibration as well, you could have possibly lost some wheel weights causing the vibration also.

[dave2953]

I think your pulling during braking is probably caused by your front brakes. You could have a seized/sticking caliper piston that is causing the problem. I'm sure there are other possiblities but I can't think of any right now; I'm sure someone else will chime in.

[Slammed70]

I had that problem with my old S-10 (396/Powerglide)after putting in a bigger stall.

It would vibrate real bad around 2500-3500 RPM, we thought it was a ****ty stall. So Marty of Neil Chance Racing Converters hooked me up with a new one. It still did it....it ended up being the driveshaft. I turned it 180 degrees and it fixed it right up.

Note to self, start marking/taking notes before you tear **** apart.

[GREASEMONKEY72]

i just did an alignment forgot to mention that and i just balanced them and it still does it and i had the drive shaft looked at and was told it was fine and i trust the shop i took it to, see it started and i did all that i just said and its still there so its not wheel balance or alignment or driveshaft even tho i think driveshaft might still be possible maybe ill turn it in the truck and see what happens but im just confused as to what it is

-steven

[mrein3]

Originally Posted by GREASEMONKEY72

i have a vibration between 35 to about 45 mph not before and not after anybody know what this might be???? and just so you know the u joints and carrier are fine i had them looked at and also the wheels just got balanced and i just had the front rotors turned and i still have the vibration is it just an old truck thing or what becuz i dont remember feeling it before and ALSO when i step on the brakes the truck pulls to the right i can let go of the wheel and i will go into the other lane and no i have not pulled the back brakes off to look yet but i should be able to tomorrow but any advice/comments are greatly apreciated and sorry for rambling

-steven

If you pull to the RIGHT when braking, look at the LEFT front brake caliper. If the left front is sticking, it is always applying the brake while driving. Then when you need the brakes and step on the pedal, that side is hot and fades, all your braking comes from the other side.
Drive around until you have this symptom, drive home and lift the left front tire off the ground. If you can't turn the tire by hand, that caliper is junk. This would be a good time to NOT touch the center of that rim. It may be quite toasty.

The vibration is NOT just an old truck thing. Something is out of balance. Your signature says you have a th350. In that case look at the flywheel and the torque converter. There may be loose bolts there. The flywheel may be out of balance. That one is going to be a bit harder to diagnose than the brakes pulling. A bud once chaced a gremlin like that on a 78 4x4. It didn't go away until he installed a new flywheel.

[centsless]

When you are between 35 and 45 and the truck is vibrating, put the truck in neutral and let off the gas. If the truck still vibrates, then you have eliminated the engine,flywheel, and converter. It could still be the d/shaft,rear,tires,etc.. If that stops the vibration, then it is the engine, flywheel,torque converter, or internal trans. Also, shift gears. Does it vibrate @35-45 in third gear? If so, drop to 2nd and see if it still does it.Try rotating the tires and see if it changes any. A bad tire will not always show up on a balancer. An Alignment will NOT cause or correct a vibration. If your truck does not pull at all when you are not using the brakes and the brakes are pulling to the left, then your right caliper is probably stuck and not applying. If it is pulling right,then it is probably the left one. If it does pull while driving, and then pulls the opposite way when braking, then you have a caliper staying applied. Also, if you have a caliper sticking, it will heat up the rotor and cause a vibration, but that will not normally go away above a certain speed. Sorry so long winded.....Hope that helps

[crazy longhorn]

Also, on your sticky caliper......it may not be the caliper at all! if you find 1 hanging, try cracking the bleeder open. if that frees it up, you have a collapsed brake hose best of luck, L

[centsless]

Originally Posted by crazy longhorn

Also, on your sticky caliper......it may not be the caliper at all! if you find 1 hanging, try cracking the bleeder open. if that frees it up, you have a collapsed brake hose best of luck, L

Good point!!

[GREASEMONKEY72]

well thanks for all the help guys im gona try to work on it as soon as i can and i will let you guys know what happens

-steven

[Brad]

I have a similar problem with my truck. I recently converted to a T-5 and thought it might have something to do with that. It was fine 1 night and I did some work on it and then when I drove it next, it had a nasty vibration in it. I ruled out tires, since they're brand new and balanced nicely. Ruled out the driveshaft and U-joints since it's all new. Today I finally took it to a trans shop with one of those old farts that's been doing it all his life. After my initial description, he thought it might be a bad pilot bushing. He then went out and sat in my truck and felt it since it does it in idle. He ruled out a pilot bushing and thinks its either an engine mount or more likely a transmission mount. He thinks the rubber is worn out and has collapsed making the metal contact metal. That makes sense to me because I clearly remember not having a vibration until I left the shop and drove it again. I think I remember reefing on the trans mounts and probably collapsed them, but I'm going to look next week hopefully.

Edit: I looked at my trans rubber mounts and they looked ok to me.

[68K20]

Originally Posted by Slammed70

I had that problem with my old S-10 (396/Powerglide)after putting in a bigger stall.

It would vibrate real bad around 2500-3500 RPM, we thought it was a ****ty stall. So Marty of Neil Chance Racing Converters hooked me up with a new one. It still did it....it ended up being the driveshaft. I turned it 180 degrees and it fixed it right up.

Note to self, start marking/taking notes before you tear **** apart.

I had the same problem with my lifted F150, rotating the driveshaft did the trick as well.

[GREASEMONKEY72]

well i was driving today and for the first time in like a week i felt the vibration again and while i driving i let off and put it in neutrel and it still vibrates, but im gona change the oil tomorrow so i will rotate the d/shaft and see if that helps and if not ill rotate the tires and go from there and ill let you guys know whats up, but THANKS for all the help so far

-steven

[GREASEMONKEY72]

well i didnt get to change my oil like i had planned but thats getting done tomorrow for sure but i did manage to fix my vibration and i bet yall will never guess what fixed it????......................nope not that................twas the air shocks reason being they didnt have any air in them put around 45psi in i think and i didnt feel it ofcourse time will tell for sure but just a reminder to all of you if you have airshocks check them and make sure they have pressure in them

-steven