Is it safe to run the truck with the driveline out? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Leviticus · 03-16-2010, 08:24 PM

Hey guys,

Here is a question that I don't know the answer to because I have never thought about doing it before. I just pulled the driveline out of my 72 C10 with the 350/TH350 to replace the carrier bearing due to the rubber being blown out, and figured I throw some new U joints on.

I have been trying to track down a whine/humming noise under light throttle and was wondering if it is safe to run it in gear up to about 1500 RPM with the driveline pulled to see if the noise is the DL or if it is in the trans?

I know we have done it with our offroad rigs after breaking a rear, we would drive out with only a front, but this was just cause we had to.

Maybe a stupid question, just have never done it.

Thanks guys!

OARNGESI · 03-16-2010, 08:28 PM

When i bought my blazer the rear was out so we pulled the driveline and used it as a front well drive

clinebarger · 03-16-2010, 08:33 PM

No its not, With no yoke in the transmission the output shaft will have no support.

Leviticus · 03-16-2010, 08:34 PM

Quote:

Originally Posted by clinebarger

No its not, With no yoke in transmission the output shaft will have no support.

There is the answer I am looking for! Thanks Cline.

KEL · 03-17-2010, 08:21 AM

Hey Leviticus
I'm doing the same thing on my 72 GMC. The new carrier bearing I got
was not idential to the old one. The inner sleeve that is not attached
is on the opposite side on the new one. My question to you is, which
side of the carrier bearing are you pointing toward the front of the truck ?
Not trying to hyjack your thread, but hoped you would have the answer.
Thanks

Hottrucks · 03-17-2010, 08:31 AM

since your doing U joints you could do it with Just the yoke...Just be smart about it with No load that thing is going to spin up to ungodly speeds the second you put it in gear with no way to slow it......so shut it off before you put it back in park......option B would be jack it up put it on stands block the front wheels take the rear wheels off and try it....

keep in mind neither is really safe...But......it gets the job done..you probably won't find the wine with no load anyway

Good Luck

Kel the carrier angle should be aim back

**Ironangel** · 03-17-2010, 08:37 AM

Quote:

Originally Posted by KEL

Hey Leviticus
I'm doing the same thing on my 72 GMC. The new carrier bearing I got
was not idential to the old one. The inner sleeve that is not attached
is on the opposite side on the new one. My question to you is, which
side of the carrier bearing are you pointing toward the front of the truck ?
Not trying to hyjack your thread, but hoped you would have the answer.
Thanks

Does it look like this?

KEL · 03-17-2010, 11:41 AM

Quote:

Originally Posted by Ironangel

Does it look like this?

No
The bolt holes are 90 degrees different from the one I have.
I'll try to get pics tonight. Was hoping Leviticus had already
done all of this !!!

Leviticus · 03-17-2010, 05:52 PM

Kel,

Nah man, you didn't hijack anything. Its all good, we are all here to help each other out. I know there are a lot of guys on here with the answer to your question, and you'll be back on the road in no time.

KEL · 03-17-2010, 06:12 PM

Thanks for your understanding.

**Ironangel** · 03-17-2010, 06:48 PM

Quote:

Originally Posted by kel

thanks for your understanding.

+1!

03-16-2010, 08:24 PM	#1
Leviticus Shake and Bake! Join Date: Feb 2010 Location: Central Coast, CA Posts: 609	Is it safe to run the truck with the driveline out? Hey guys, Here is a question that I don't know the answer to because I have never thought about doing it before. I just pulled the driveline out of my 72 C10 with the 350/TH350 to replace the carrier bearing due to the rubber being blown out, and figured I throw some new U joints on. I have been trying to track down a whine/humming noise under light throttle and was wondering if it is safe to run it in gear up to about 1500 RPM with the driveline pulled to see if the noise is the DL or if it is in the trans? I know we have done it with our offroad rigs after breaking a rear, we would drive out with only a front, but this was just cause we had to. Maybe a stupid question, just have never done it. Thanks guys! __________________ "All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA"

03-16-2010, 08:28 PM	#2
OARNGESI Registered User Join Date: Sep 2008 Location: CASA GRANDE AZ Posts: 4,276	Re: Is it safe to run the truck with the driveline out? When i bought my blazer the rear was out so we pulled the driveline and used it as a front well drive __________________ 70 SWB STEPSIDE 70 BLAZER 09 challenger

03-16-2010, 08:33 PM	#3
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Is it safe to run the truck with the driveline out? No its not, With no yoke in the transmission the output shaft will have no support. Last edited by clinebarger; 03-16-2010 at 08:34 PM.

03-17-2010, 08:21 AM	#5
KEL 72 GMC Join Date: Feb 2008 Location: Wells, Maine Posts: 534	Re: Is it safe to run the truck with the driveline out? Hey Leviticus I'm doing the same thing on my 72 GMC. The new carrier bearing I got was not idential to the old one. The inner sleeve that is not attached is on the opposite side on the new one. My question to you is, which side of the carrier bearing are you pointing toward the front of the truck ? Not trying to hyjack your thread, but hoped you would have the answer. Thanks

03-17-2010, 08:31 AM	#6
Hottrucks Redefining LowBudget Join Date: Mar 2009 Location: lebanon Cow Hampshire Posts: 4,538	Re: Is it safe to run the truck with the driveline out? since your doing U joints you could do it with Just the yoke...Just be smart about it with No load that thing is going to spin up to ungodly speeds the second you put it in gear with no way to slow it......so shut it off before you put it back in park......option B would be jack it up put it on stands block the front wheels take the rear wheels off and try it.... keep in mind neither is really safe...But......it gets the job done..you probably won't find the wine with no load anyway Good Luck Kel the carrier angle should be aim back __________________ 1970 C10 CST fleetside 472 ....big dreams little cash... http://67-72chevytrucks.com/vboard/s...d.php?t=335721 SunShine Syndicate.. Mikes Sandwich Fair Run OCT 8th 2011 http://www.thesandwichfair.com/html/...auto_show.html

03-17-2010, 05:52 PM	#9
Leviticus Shake and Bake! Join Date: Feb 2010 Location: Central Coast, CA Posts: 609	Re: Is it safe to run the truck with the driveline out? Kel, Nah man, you didn't hijack anything. Its all good, we are all here to help each other out. I know there are a lot of guys on here with the answer to your question, and you'll be back on the road in no time. __________________ "All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA"

03-17-2010, 06:12 PM	#10
KEL 72 GMC Join Date: Feb 2008 Location: Wells, Maine Posts: 534	Re: Is it safe to run the truck with the driveline out? Thanks for your understanding.



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