I have a 91 s10 l4 2.5l base model truck with a manual tranny and recently when i shift into reverse it squeeks when driving and in forward gears it vibrates through all gears it feels like the vibration is in the rear end unless at high speeds then it feels like some vibrations are comming from the front anybody have any ideas what might be causing this and what possibly i could do about this?

425

Asked by May 04, 2013 at 12:32 AM about the 1991 Chevrolet S-10 STD Standard Cab SB

Question type: Maintenance & Repair

27 Answers

Yes, your transmission mounts (made of rubber) are starting to degrade from exposure to UV---maybe your motor mounts as well...

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425

How easy would it be to fix this issue myself im mechanically inclined and i have the repair manual but im no mechanic

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425

Does it make a difference that when i put the cluch in or have it in neutral it still does that vibration

no, just get a good floor jack and a block of wood, take 'er up. Give yourself enough room to extract the old one....both halves, and slip and bolt the new ones in....no biggie~

1 out of 1 people think this is helpful.

poke at them with a big prybar or screwdriver to make sure they are the ones givin' you the problems, so as to not waste our resources~

Best Answer

there may be bearing problems if things are oscillating that shouldn't be, needs an examination~

maybe the bolts that fasten the engine to the transmission are loose~

425

Bearings in the axle or tranny?

425

Ill check those bolts too i got a bunch on the checklist for my day off thnx judge_roy

sadly. yes, if high-milage and no one did any routine maintenance you can keep runnin' "until the wheels go square"....ha..

425

Sadly there is alot of miles on it 232 thou and some chage when i got it its now at 272 thou and ive been doing repairs on it since i got it so i would say someone just did the basics when they owned it but i wanna keep it for a long time so im unfortunately doing everything else :(

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15

I had a similar problem and it tuned out to be the universal joints at both ends of the drive shaft maybe check those too while you are under there

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425

Thnx jonathan ill check that while im crwling under there today

425

Could the problem possibly be to do with the vibration?

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425

Sorry could suspension be the issue

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if you're stopped movin' and it's still happening am going with demontoad117 on this one~

hoss a lot of wear, lube 'er up and turn 'er free---

425

So checked axle, driveshaft, bushings, mounts, tires, harmonic stablizer, u-joints, bolts, tranny fluid and rear brakes but i still have the vibration and cant figure out what it is... The only thing i can think of is somethin is off with the front end brakes please advise with any advice/input

1 out of 1 people think this is helpful.

does it pull? one of your calipers might be sticking as evidenced by uneven wear on one of the rotors~ this would grind and not be happy~

425

There has been a slight pull to the right but thats been going on longer than this issue

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pull of the wheel and see if the caliper will move side-to-side...these need a special molybednum grease~ the rotors, if vented will show one side of the center vanes larger than the other----replace the rotor and put new pads into the calipers~

1,535

If you have vibration in the drive train,(engine and trans) but the vehicle is not moving.Then you need to look at what is moving.Like the fly wheel and clutch plate. If your ear end is squeaking check the gear oil in the differential it could be low or gone.That would result in gear wear and vibrations.

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425

The vibration was in forward gears squeeking in reverse but only when the tires not in 0° position but i topped up the tran fluid, checked 15 different things and tightened the engine ground wire took it on the highway and the vibration is gone its just the sqeeking that persists

1,535

Is the squeaking when the trans is in gear (1,2,3,or 4) if so jack it up block the front wheels.(with rear wheels off ground) start it up and engage the drive line.That way you can tell if its in the rear end,drive axles drive shaft etc.

425

No the squeeking is only in reverse and only when the tires are turned if they are straight no squeek

...aaah, the bearings need to be repacked/lubed~

25

almost surely universal jont or joints

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