Question about 1991 GMC Sonoma

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1991 sonoma clutch question

I have a 1991 GMC sonoma with the 2.8 V6. Its a 5 speed tranny and the throwout bearing went out a while back. I got a guy to put it in for me but now it still has a loud whining coming from the tranny when going down the road. when sitting still it sounds like its free spining or something. I was told that he might not have installed the pilot bushing in. If this is so how long can I drive it before it goes out again??

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  • whitetail_ad Jan 26, 2009

    about what would it cost to get this repaired? If its too much I will just go ahead and make a race truck out of the body and get something else to drive



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DO NOT DRIVE, get the vehicle to a transmission specialist it sounds as if a bearing has failed in the transmission. these units have a habit of exploding through the case. If this happens a very expensive new unit is required. second hand units are as rare as rocking horse *?$!.

Posted on Jan 22, 2009


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No clutch pressure

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So I heard my throw out bearing making some noise. When I push the clutch in the noise stops and when I let the clutch out the throw out bearing was howling a little. Then I was driving down the freeway in...

ooh this sounds bad your gonna have to remove the trans inspection plate and look to see what got damaged with light squeaky throwout bearings are a warning of bigger things to come could be a total failure of clutch packs and pressure plates

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1991 Chevy C1500, 4.3L V-6, 5-speed tranny. Is there adjustment to reduce clutch pedal play? I just replaced the clutch master and slave cylinders but still have excessive play. Repair manuals I have do...

If you have already gotten all the air out of the system, you may have to remove the clutch assembly and check the finger height compared with the one you removed as some designs are lower or higher than the original. You can either try to find one that matches the old one or change the throwout bearing (they come in several heights)...In your case I'd use a longer one.
The transmission has nothing to do with clutch release height and the only part it plays in clutch operation is that the neck on the front cover acts as a guide to stabilize the throwout bearing. (always make sure there is a light coating of grease on it so the bearing does not seize on there when in use.)

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Just bought a 2004 Elantra (93000 miles) with 5 speed tranny. With the hood up and my daughter behind the wheel I noticed a rattling sound (in neutral) coming from the clutch/transmission area when the...

I would be checking the throwout bearing. But, if the clutch isn't slipping, maybe leave it for now?

If you put it in 5th gear, let out the clutch with handbrake applied and it stalls--the clutch isn't slipping for sure.

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How much does a throwout bearing cost for a 98 gmc sonoma and hoe hard are they to put in or how much does it cost for someone to put it in

They run about $60, and changing them requires removing the transmission and drive shaft. While you're in there, you should probably replace the clutch and pressure plate.

Check with some local garages or dealers to get their price for doing this.

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When the clutch is released, there is a lot of noise coming from the front of the transmission in all gears including neutral

this sounds like a bad clutch throwout bearing in tranny. if it makes a rattling noise then its the bearing. when clutch pedal is pushed in.

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1 Answer

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Changing the clutch or throwout bearing in a rear wheel drive is one of the easier things to do.
Having it on a lift is nice but it doesn't have to be. The truck needs to be high enough to get under and work. Needs to be on jack stands or blocking sturdy enough to hold the truck steady. Do not use ramps.

Remove the drive shaft, making sure the caps stay on the U joints. remove the shifter from the transmission. Take the slave cylinder off the trans., the stater, and then the transmission from the engine. You will need to support the motor in place so that it doesn't tear up the radiator or the firewall depending on the balance point. Take the trans down by pulling it back about 3 inches. Use a jack or 2 people to do this. Transmission is somewhere around 100 lbs.
On the back of the motor you will see the pressure plate held on to the flywheel with 6 bolts. Take the pressure plate off and the clutch is between the pressure plate and the flywheel. The flywheel may need to be resurfaced or you may just clean it up with coarse sandpaper. The clutch disc goes in one way with the spring assembly facing the rear of the truck. There should be an alignment tool with the clutch kit. The clutch has to be centered on the flywheel. If there is no alignment tool provided, you can center it by making sure the clutch disc is even with the edge of the pressure plate all the way around. Usually, the clutch is just a little bit smaller diameter than the pressure plate.

The throwout bearing is on the shaft coming out of the transmission. Should be held on by a fork that sticks out through the bell housing. After the throwout is replaced and you make sure it has free travel on the shaft reinstall the transmission. You may need to wiggle it a bit to get the splines on the shaft and the ones in the clutch to line up. Make sure the transmission is held straight so that the shaft in the transmission doesn't get bent. Slide the trans. to the motor and onto the alignment pins and bolt in place. Reinstall everything and you are done.
Thank you for using Fixya and since your going to replace the throwout bearing, you might as well replace the clutch since you have the transmission away from the engine to replace the bearing. Good luck and be safe.

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That sounds like it could be... I'm assuming the bearing slipped off of the fork, and that would give you this condition, see if you can look in through the rubber boot at the fork to see this.

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