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04-28-2010, 04:27 PM | #1 |
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Join Date: Nov 2009
Location: Mesa, AZ
Posts: 226
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So, if you bust your carrier bearing clean off the frame...
...on a lowered truck, would you guess the rear portion of the DS is too long? The PO said it had been shortened, but I can't confirm.
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04-28-2010, 06:12 PM | #2 |
Shake and Bake!
Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Re: So, if you bust your carrier bearing clean off the frame...
I have seen them break for no good reason, they are a crap design to begin with. But it could be because of your drop. Is there a much of force pushing on it while it is sitting parked?
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04-28-2010, 08:06 PM | #3 |
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Join Date: Mar 2010
Location: Minooka IL
Posts: 191
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Re: So, if you bust your carrier bearing clean off the frame...
wouldn't this be a good time to just switch to a one piece drive shaft? I don't see why gm decided on a two piece drive shaft on shortbed trucks anyways. It seems like a lot of parasitic loss for such a short length. As soon as I swap out my trans(hopefully soon) I'm changing mine out for a one piece aluminum shaft. I'm thinking about buying the rear cross member from CPP to eliminate the stock piece and to allow room for if I end up dropping the truck.
Maybe I'm off base here but I've had plenty of shortbed trucks and they've never had a two piece drive shaft.
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Ben _____________________________________ 1971 Chevy shortbed 350/4-speed sold 2005 Chevy Duramax EC/4x4 Local 597 Pipefitters certified TIG MIG and stick welder |
04-28-2010, 09:13 PM | #4 | |
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Re: So, if you bust your carrier bearing clean off the frame...
Quote:
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04-28-2010, 09:22 PM | #5 |
Redefining LowBudget
Join Date: Mar 2009
Location: lebanon Cow Hampshire
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Re: So, if you bust your carrier bearing clean off the frame...
I'm dropped with a c notch and havn't had an issue ( YET) and I didn't shorten mine
now I'm worried??
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1970 C10 CST fleetside 472 ....big dreams little cash... SunShine Syndicate.. Mikes Sandwich Fair Run OCT 8th 2011
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04-28-2010, 10:56 PM | #6 | |
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Location: SOMERSET KY.
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Re: So, if you bust your carrier bearing clean off the frame...
Quote:
GM MADE 2 DIFFERENT STYLE CARRIER BEARINGS, OR MID-SHIFT BEARINGS. I BELIEVE ONE STYLE WAS FOR 67-68 TRUCKS & ONE FOR 69-72 WITH THE LATTER BEING MUCH MUCH MORE STURDY. PARASITIC LOSS?? MUST BE ONE OF THOSE $3 WORDS US HILLBILLYS HAVE BEEN ABLE TO GET AWAY WITHOUT USING FOR BETTER THAN 50 YEARS. JOHN
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04-28-2010, 11:44 PM | #7 |
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Location: Lake Stevens, WA
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Re: So, if you bust your carrier bearing clean off the frame...
As the rear end moves up and down it changes the position of the driveline. The carrier bearing is static on the driveline and the carrier bearing housing is bolted firmly to the frame. What provides the flex between the bearing and the housing is just a big rubber bushing which wears out the more it flexes.
The guy who lowered your truck may not have moved the carrier bearing to take the stress out of it like Leviticus said. Or it may be just a poor quality bearing. The only reason i can see that GM went with a two piece rather than a one piece driveline is for ground clearance. But that doesn't make any sense, as the driveline halves on all the trucks I've seen seem to be more or less perfectly in line with each other. Maybe a longer one is too easily bent... prone to imbalance. They're the skinniest little things compared to the new trucks. And heavy as can be. |
04-29-2010, 07:39 PM | #8 |
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Location: Mesa, AZ
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Re: So, if you bust your carrier bearing clean off the frame...
Indyduke, that is the issue. After getting under and getting a good look, there's a fair amount of angle at the bearing. when there's angle, there's deflection in the Ujoints, and over time, it stress cracked the T shaped mount, and the metal failed. The bearing on there was a Spicer, and it got replaced today with the same.
Questions - how do you move it upward, or does anyone make one with a shorter T on it? The only way I can see to move it up is to modify the crossmember. Going to a U shaped one would require some driveline mods as well as at least some hole drilling to accomodate the bolts. Another option is removing the blocks in the back and going from a 6" to a 4" drop to ease the angles. I've been thinking about this anyways so I can run a little taller tire to get my speedo closer to being accurate. (current tires are 235/60/15 - I would go to a 70 - about 2" taller) My concern there is would the truck look right if I did that...it would have a little bit of rake to it with the rear end a tick higher. I'm just wondering if this would help significantly. That carrier bearing only lasted about 6-7k miles before it failed. I expect the new one to do the same if I don't do something. |
04-29-2010, 07:57 PM | #9 |
Redefining LowBudget
Join Date: Mar 2009
Location: lebanon Cow Hampshire
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Re: So, if you bust your carrier bearing clean off the frame...
not sure where the pic is but some guys have flipped the carrier hanger upside down to get a better angle
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04-29-2010, 08:14 PM | #10 |
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Location: Mesa, AZ
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Re: So, if you bust your carrier bearing clean off the frame...
You'd have to make a drop bracket to do that so you have something to bolt it to.
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04-29-2010, 08:22 PM | #11 |
Redefining LowBudget
Join Date: Mar 2009
Location: lebanon Cow Hampshire
Posts: 4,538
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Re: So, if you bust your carrier bearing clean off the frame...
basicly to take out the old rivets and flip the hanger that the carrier bolts to
right now I'm just trying to figure out how much Hp that tiny DS will take
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1970 C10 CST fleetside 472 ....big dreams little cash... SunShine Syndicate.. Mikes Sandwich Fair Run OCT 8th 2011
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