Carrier bearing offset? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 16 (permalink) Old 02-15-2011, 12:46 AM Thread Starter
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Carrier bearing offset?

I have yet another problem with my engine swap..... The tranny is about 3 inches front from where it last was. This truck has 2 driveshafts, one maybe like 4ft and has the carrier bearing, and the other has the slip joint and is like 8ft long. The slip joint had been just about all the way together, so by the tranny moving forward, that was no problem, and probably made things better. The front driveshaft is connected to the tranny, but the carrier bearing has run out of its 'adjustment' The holes where it mounts are slotted, and I need about an inch more, maybe 2. Is there a such thing as an offset carrier bearing mount?

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post #2 of 16 (permalink) Old 02-15-2011, 01:47 AM
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I have yet another problem with my engine swap..... The tranny is about 3 inches front from where it last was. This truck has 2 driveshafts, one maybe like 4ft and has the carrier bearing, and the other has the slip joint and is like 8ft long. The slip joint had been just about all the way together, so by the tranny moving forward, that was no problem, and probably made things better. The front driveshaft is connected to the tranny, but the carrier bearing has run out of its 'adjustment' The holes where it mounts are slotted, and I need about an inch more, maybe 2. Is there a such thing as an offset carrier bearing mount?

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Your going to have to retube some drive lines.
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post #3 of 16 (permalink) Old 02-15-2011, 02:05 AM
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Just use 2 pieces of angle iron , parrelell to the drive shaft bolted to the frame bracket and the bearing (4 bolts )

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post #4 of 16 (permalink) Old 02-15-2011, 06:04 AM
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Quote:
Originally Posted by 379Longhood View Post
Just use 2 pieces of angle iron , parrelell to the drive shaft bolted to the frame bracket and the bearing (4 bolts )

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post #5 of 16 (permalink) Old 02-15-2011, 12:06 PM Thread Starter
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Originally Posted by 379Longhood View Post
Just use 2 pieces of angle iron , parrelell to the drive shaft bolted to the frame bracket and the bearing (4 bolts )
I like that idea. The actual driveshaft lengths are the way they should be. The carrier bearing is really close to the one yoke, and that crossmember is the frontmost one - I'm not sure how I could make an improvement by making a new driveshaft.

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post #6 of 16 (permalink) Old 02-15-2011, 07:53 PM
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I would have the tube cut and re welded. The shop near me would charge about $150-$200 to cut,weld and re balance if I just drop it off at their shop.

but either way will work for you.

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post #7 of 16 (permalink) Old 02-16-2011, 04:46 PM
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Anytime you adjust placement of drivelines you need to be sure the plane angels of the joints are equal. If one u-joint is up 10 degrees from center line the opposing joint should be down at 10 degrees. Spicer makes a tool to do this, I've got one in the shop.

The reason for that is so the joints roll or break at the same time thus damping out the vibration. Normally transmission and rear end yokes are parallel so carrier height and angle would be adjusted to plane each yoke on both sides of the carrier.

Incorrect angle is the most common source of driveline vibration.

http://www.spicerparts.com/measuring.asp

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Last edited by Lowboy; 02-16-2011 at 04:56 PM.
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post #8 of 16 (permalink) Old 02-16-2011, 09:21 PM
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Originally Posted by Lowboy View Post
Anytime you adjust placement of drivelines you need to be sure the plane angels of the joints are equal. If one u-joint is up 10 degrees from center line the opposing joint should be down at 10 degrees. Spicer makes a tool to do this, I've got one in the shop.

The reason for that is so the joints roll or break at the same time thus damping out the vibration. Normally transmission and rear end yokes are parallel so carrier height and angle would be adjusted to plane each yoke on both sides of the carrier.

Incorrect angle is the most common source of driveline vibration.

http://www.spicerparts.com/measuring.asp
That is some advice alot of guys just dont get. Ride height is also very inportant.
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post #9 of 16 (permalink) Old 02-16-2011, 10:48 PM Thread Starter
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Thanks for the info! I'll have to be sure to see how my 'modification' will affect the driveline height at that point. I know the idea above will change the angle a little, cause the mount will be about 2 inches to the front, and maybe 1/4 or so lower - so the angle at the tranny will be greater, and the midpoint angle will be lower.....

Rodney
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post #10 of 16 (permalink) Old 02-17-2011, 12:18 AM
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This is still the 200 miles (or so ) a year truck isn't it ??

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