trans question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mrsmothers · 03-16-2011, 03:18 PM

Ok I have a 350 backed by a three on the tree. I have to rev the hell out of it to get it to move, the shift to second ... not so bad... the shift to third pretty much stalls it out even if I shift at 45mph. Any on ever had this problem.

Wrenchbender Ret · 03-16-2011, 03:47 PM

Sounds like your clutch is slipping. It needs adjusting or replacement. If you have run it like this there is no dought it needs replacement.

mrsmothers · 03-17-2011, 12:02 PM

I really havent run it much like this only a few miles. The clutch dosent start engaugeing intill the peddal is almost out where should it be grabbing at? and how do I adjust it?

68gmsee · 03-17-2011, 01:20 PM

I have about 1 to 1-1/2 inches of free play on mine before it starts to contact the throwout bearing and push the pressure plate. Haven't measured it but about half ways through the travel the clutch releases.

To test yours: Park the truck in the street. Start the truck while it's in 3rd and slowly release the clutch while feathering the gas pedal. If the truck dies out or stalls instantly usually indicate that the clutch is at least engaging. If the engine revs higher and little or no forward movement you have slippage.

It's still possible for the clutch to slip once you get moving so if you're not familiar with how to tell the difference have someone that has experience try it.

Also you have to differentiate from choke out of adjustment cold engine revving or lack of fuel starvation revving.

Wrenchbender Ret · 03-17-2011, 04:39 PM

You should have 1/2 to 1 in. of free play in the pedal. You can adjust it by getting under the truck. There is a treaded adj. rod with 2 nuts, one on each side of the swivel. Adjust these nuts till you get some freeplay in the linkage. Like Gmsee says you should be able to let the clutch out & kill the engine. If you get it adjusted & it won't you are do for a new clutch. These are about the easiest vehicle out there to put a clutch in as clutch replacements go.

mrsmothers · 03-17-2011, 08:57 PM

I am gonna take it by the shop I go to get the clutch adj do you think that driving it eight miles in traffic will kill the clutch?

hayhauler71 · 03-17-2011, 09:35 PM

Quote:

Originally Posted by mrsmothers

I am gonna take it by the shop I go to get the clutch adj do you think that driving it eight miles in traffic will kill the clutch?

If it slips that bad it will be garbage when you get to the shop

mrsmothers · 03-18-2011, 12:31 AM

I think I may have it adj if I put it in 1st and give it no gas and let it out it stalls. But I still have to rev the hell out of it to get it to go. Same thing for 3rd if I give it a little gas it will still die in 3rd.

crazy longhorn · 03-18-2011, 01:53 AM

Quote:

Originally Posted by mrsmothers

I think I may have it adj if I put it in 1st and give it no gas and let it out it stalls. But I still have to rev the hell out of it to get it to go. Same thing for 3rd if I give it a little gas it will still die in 3rd.

If the clutch is slipping, the eng wont die out in 3rd , it will rev up & the truck wont go anywhere. 1 way I like to check, is to pull a hill in 2nd or 3rd....step down on the throttle. If the motor revs up, you have a bad clutch, but if it slows down(buck ,snort, ect), the clutch is ok...you have a tuning issue. Hope that helps,crazyL

68gmsee · 03-18-2011, 09:21 AM

When my nephew asked me if he could have my 69 chevy I asked him if he was willing to dive in and learn how to work on it 'cause these old trucks need a lot of tweaking. He said he'd rather just buy a newer car.

Become familiar with the clutch and how it works do a little research and ask the members on this site. I've found out there's a lot of knowledge here and it's free!

Here's a pic of your clutch linkage someone posted before. Loosen the lock nut and make sure you have the proper adjustments first. Be prepared to spend anywhere from $500 on up to fix it. You will probably need clutch and pressure plate, throw out bearing and maybe the flywheel. Can cost $600 or more.

mrsmothers · 03-24-2011, 10:22 PM

Well got the clutch fixed it runs great!!!!!!! But now for some reasion the it keeps getting stuck between gear . Its in the colum I will go to move the gear lever and it wont move you have to open the hood and hit the part that shifts with a hammer. Is there any way to fix this?

03-16-2011, 03:18 PM	#1
mrsmothers Registered User Join Date: Oct 2010 Location: ruston la Posts: 169	trans question Ok I have a 350 backed by a three on the tree. I have to rev the hell out of it to get it to move, the shift to second ... not so bad... the shift to third pretty much stalls it out even if I shift at 45mph. Any on ever had this problem.

03-16-2011, 03:47 PM	#2
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,227	Re: trans question Sounds like your clutch is slipping. It needs adjusting or replacement. If you have run it like this there is no dought it needs replacement.

03-17-2011, 12:02 PM	#3
mrsmothers Registered User Join Date: Oct 2010 Location: ruston la Posts: 169	Re: trans question I really havent run it much like this only a few miles. The clutch dosent start engaugeing intill the peddal is almost out where should it be grabbing at? and how do I adjust it?

03-17-2011, 01:20 PM	#4
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: trans question I have about 1 to 1-1/2 inches of free play on mine before it starts to contact the throwout bearing and push the pressure plate. Haven't measured it but about half ways through the travel the clutch releases. To test yours: Park the truck in the street. Start the truck while it's in 3rd and slowly release the clutch while feathering the gas pedal. If the truck dies out or stalls instantly usually indicate that the clutch is at least engaging. If the engine revs higher and little or no forward movement you have slippage. It's still possible for the clutch to slip once you get moving so if you're not familiar with how to tell the difference have someone that has experience try it. Also you have to differentiate from choke out of adjustment cold engine revving or lack of fuel starvation revving.

03-17-2011, 04:39 PM	#5
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,227	Re: trans question You should have 1/2 to 1 in. of free play in the pedal. You can adjust it by getting under the truck. There is a treaded adj. rod with 2 nuts, one on each side of the swivel. Adjust these nuts till you get some freeplay in the linkage. Like Gmsee says you should be able to let the clutch out & kill the engine. If you get it adjusted & it won't you are do for a new clutch. These are about the easiest vehicle out there to put a clutch in as clutch replacements go.

03-17-2011, 08:57 PM	#6
mrsmothers Registered User Join Date: Oct 2010 Location: ruston la Posts: 169	Re: trans question I am gonna take it by the shop I go to get the clutch adj do you think that driving it eight miles in traffic will kill the clutch?

03-18-2011, 12:31 AM	#8
mrsmothers Registered User Join Date: Oct 2010 Location: ruston la Posts: 169	Re: trans question I think I may have it adj if I put it in 1st and give it no gas and let it out it stalls. But I still have to rev the hell out of it to get it to go. Same thing for 3rd if I give it a little gas it will still die in 3rd. Last edited by mrsmothers; 03-18-2011 at 12:36 AM.

03-18-2011, 09:21 AM	#10
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: trans question When my nephew asked me if he could have my 69 chevy I asked him if he was willing to dive in and learn how to work on it 'cause these old trucks need a lot of tweaking. He said he'd rather just buy a newer car. Become familiar with the clutch and how it works do a little research and ask the members on this site. I've found out there's a lot of knowledge here and it's free! Here's a pic of your clutch linkage someone posted before. Loosen the lock nut and make sure you have the proper adjustments first. Be prepared to spend anywhere from $500 on up to fix it. You will probably need clutch and pressure plate, throw out bearing and maybe the flywheel. Can cost $600 or more.

03-24-2011, 10:22 PM	#11
mrsmothers Registered User Join Date: Oct 2010 Location: ruston la Posts: 169	Re: trans question Well got the clutch fixed it runs great!!!!!!! But now for some reasion the it keeps getting stuck between gear . Its in the colum I will go to move the gear lever and it wont move you have to open the hood and hit the part that shifts with a hammer. Is there any way to fix this?



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