1984 K10 manual trans probems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DuckhunterInTN · 06-30-2003, 12:44 PM

I've got a 1984 K10 6.2 diesel with a manual trans, 3spd+OD. The other day I shifted it and it won't come out of gear. It seems to be stuck in second. What is causing this? Would a throwout bearing going down cause this? It had a noise that would appear while idling in neutral but would go away when clutch was depressed.

How hard and $$$ is this to fix?

TC70C10 · 06-30-2003, 01:01 PM

I had a throw out bearing go a couple of months ago. Similar symptons.

I'd set the parking brake and climb under the truck and try to engage/disengage the clutch with the clutch fork. Also check for a missing spring.

Unfortunately, there's no real easy way to replace.

Pull motor, or drop the transmission. I was able to bring my transfer case and Transmission down as a unit. Much easier to do it from the top instead of crawling around on the garage floor. Good luck.

TIm

Scrub · 07-01-2003, 03:21 AM

Two things can happen
The end of your shift stick can get worn out and slip out of the track. Probably means you have detent problems too. You can pull the shifter out by pressing down on the circular sheet metal piece that is at the base of the shifter and turning it (Counter clockwise I think). You can look in there and see if the shaft onthe right is forward and you can move it back and then put the shifter back in. You will probably want to have the top of the tranny rebuilt if it does it again.

the 2nd thing is you may have a bent fork that slipped off and now is holding the 2nd gear in.

You can pull the top of the tranny off by putting it half way into reverse. (If you can get it into reverse) this is a lot more work as you have to put the floor mats up and remove the tranny tower cover from the floorboards.

If you have a bent fork, or just worn out rails, you may want to get a new tranny.

A noise that goes away when the clucth is depressed can mean the tranny is getting worn, as the tranny will stop turning when you push in the clutch. It can also mean a lot of other things too, like a worn carrier (the tube around the splined input shaft that the throwout bearing slides on.)

Hope this helps
Good luck

06-30-2003, 12:44 PM	#1
DuckhunterInTN Registered User Join Date: Feb 2003 Location: Brownsville, TN Posts: 88	1984 K10 manual trans probems I've got a 1984 K10 6.2 diesel with a manual trans, 3spd+OD. The other day I shifted it and it won't come out of gear. It seems to be stuck in second. What is causing this? Would a throwout bearing going down cause this? It had a noise that would appear while idling in neutral but would go away when clutch was depressed. How hard and $$$ is this to fix? __________________ 2004 GMC 2500HD 4x4 Crew Cab Duramax 2000 Chevrolet ext-cab Z71 1995 Chevrolet ext-cab Z71 1984 Chevrolet K10 6.2 4x4 1972 GMC Jimmy 4x4 1967 Chevrolet C50 Dump truck 1957 GMC 1/2 ton stepside (not running)

06-30-2003, 01:01 PM	#2
TC70C10 Registered User Join Date: Nov 2001 Location: Harvest, AL 35749 Posts: 337	I had a throw out bearing go a couple of months ago. Similar symptons. I'd set the parking brake and climb under the truck and try to engage/disengage the clutch with the clutch fork. Also check for a missing spring. Unfortunately, there's no real easy way to replace. Pull motor, or drop the transmission. I was able to bring my transfer case and Transmission down as a unit. Much easier to do it from the top instead of crawling around on the garage floor. Good luck. TIm __________________ 1981 K5 Blazer 305, 4spd, 4x4, 4" Lift, custom bumpers, Warn 9.5 Ti Winch 1995 T10 Blazer 4.3L 4x4 (Son's) 2004 GMC Envoy 4.2L 2WD 2005 GMC Sierra Crew Cab Z71 4x4 5.3L 240 Fun Finder Travel Trailer Harvest, AL 35749

07-01-2003, 03:21 AM	#3
Scrub Collector of rusty Items Join Date: Dec 2001 Location: Sisters,Oregon USA Posts: 731	Two things can happen The end of your shift stick can get worn out and slip out of the track. Probably means you have detent problems too. You can pull the shifter out by pressing down on the circular sheet metal piece that is at the base of the shifter and turning it (Counter clockwise I think). You can look in there and see if the shaft onthe right is forward and you can move it back and then put the shifter back in. You will probably want to have the top of the tranny rebuilt if it does it again. the 2nd thing is you may have a bent fork that slipped off and now is holding the 2nd gear in. You can pull the top of the tranny off by putting it half way into reverse. (If you can get it into reverse) this is a lot more work as you have to put the floor mats up and remove the tranny tower cover from the floorboards. If you have a bent fork, or just worn out rails, you may want to get a new tranny. A noise that goes away when the clucth is depressed can mean the tranny is getting worn, as the tranny will stop turning when you push in the clutch. It can also mean a lot of other things too, like a worn carrier (the tube around the splined input shaft that the throwout bearing slides on.) Hope this helps Good luck __________________ Scrub Sisters, Oregon - Home of the Sisters Rodeo. 70 GMC 1,000,000 + miles 72 K-20 project, 456 Dana60 front, Corp14 rear w/locker, 265R19.5 tires 20-ply. Warn 12k winches both ends, Cross-over steering with raised tie-rod, Powerbox steering, 4500 watt 120-AC power, Air, Hydraulic aux power, 4 inch lift, 5000 lb air-bags both ends.



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