Is it safe to run the truck with the driveline out?

[Leviticus]

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]

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

[clinebarger]

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

[Leviticus]

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]

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]

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]

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]

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]

Originally Posted by KEL

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 !!!

Kel,

You might have gotten the wrong carrier bearing assembly. They make a "Horseshoe" type like you see on most 2 piece shafts now days and the inline one like in the pic above which is used on most of our rigs.

I can't remember off hand what the horseshoe type assemblies are for but I want to say C20's or trucks with leafs, but I may be way off here.

If the bolt holes don't line up, you need the other type.

[KEL]

I'll try to post pictures. The new one and the one I removed are
almost identical. You will understand my question better after
I post pics.

[KEL]

Got a few pics. The bearings are almost identical. The "loose" sleeve is
on opposite sides of the old and new bearing. Is this an issue ? And,
which side of the bearing faces the front half of the driveshaft ?
Thanks for the input.
KEL

[Leviticus]

Originally Posted by KEL

Got a few pics. The bearings are almost identical. The "loose" sleeve is
on opposite sides of the old and new bearing. Is this an issue ? And,
which side of the bearing faces the front half of the driveshaft ?
Thanks for the input.
KEL

Kel,

I'm not sure bud, the horseshoe type you have I have never dealt with on these trucks. I would think it wouldn't really matter which way, but like I said, I'm not sure.

Good luck.

[KEL]

Leviticus
Thanks for your help.
I should have started a new thread instead of jumping on yours.
Thought you were working with the same parts.
Hopefully, someone will jump in with the right answer.
Again, sorry for the hyjack, and thanks for the help.
Kel

[Leviticus]

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]

Thanks for your understanding.

[Ironangel]

Originally Posted by kel

thanks for your understanding.

+1!