rear axle and brake ?'s - The 1947 - Present Chevrolet & GMC Truck Message Board Network

drivethechevy · 11-16-2008, 12:16 AM

i finaly finished up with my other projects i had goin and i am getting back to workin on my 68 k10, and i have a couple questions i need answered so i can direct my net paycheck in the right path

first-i just pushed it back into the shop and i noticed a new clunking sound coming from the rearend, does anyone have any ideas of what might be making the sound, its a low thud and it only seemed to do it when i was pushing the truck in reverse?

second-i have to determin what the front axles ratio is so i can figure out if the rear is matching or not, and if not i am going to replace the rear axle, would any gm rear axle bolt right in in the place of the old rearend?

and last- the rubber brake hose's going to the rearend and to the front axles are all rotten, are those hose's available at parts stores like napa or orileys, and is there a better replacement out there ?

thanks in advance guys
nate

Longhorn Man · 11-16-2008, 10:20 AM

clunking may well be the rear U joint

drivethechevy · 11-16-2008, 06:04 PM

is there a simple way to check if it is the u-joint making the sound?

**WorkinLonghorn** · 11-16-2008, 06:12 PM

Put it in neutral,set the parking brake.crawl under there and give the drive shaft a good twist back and forth with both hands and watch the u-joint.If you don't see and play,place one hand on the joint so you can feel both sides and twist the shaft with the other and if you can perceive ANY differential in movement indicating looseness,replace it. To check the front one just twist the two sides in different directions and watch/feel.

drivethechevy · 11-16-2008, 07:28 PM

Quote:

Originally Posted by WorkinLonghorn

Put it in neutral,set the parking brake.crawl under there and give the drive shaft a good twist back and forth with both hands and watch the u-joint.If you don't see and play,place one hand on the joint so you can feel both sides and twist the shaft with the other and if you can perceive ANY differential in movement indicating looseness,replace it. To check the front one just twist the two sides in different directions and watch/feel.

is there any way to do that without using the parking brake, cause my truck doesnt have one till i fix my rearend or get a new one,
thanks

11-16-2008, 12:16 AM	#1
drivethechevy Registered User Join Date: May 2007 Location: Buffalo MN Posts: 606	rear axle and brake ?'s i finaly finished up with my other projects i had goin and i am getting back to workin on my 68 k10, and i have a couple questions i need answered so i can direct my net paycheck in the right path first-i just pushed it back into the shop and i noticed a new clunking sound coming from the rearend, does anyone have any ideas of what might be making the sound, its a low thud and it only seemed to do it when i was pushing the truck in reverse? second-i have to determin what the front axles ratio is so i can figure out if the rear is matching or not, and if not i am going to replace the rear axle, would any gm rear axle bolt right in in the place of the old rearend? and last- the rubber brake hose's going to the rearend and to the front axles are all rotten, are those hose's available at parts stores like napa or orileys, and is there a better replacement out there ? thanks in advance guys nate __________________ Trial and Error, its expensive but its a mistake i most likely wont make again 1971 chevy k10 custom deluxe http://67-72chevytrucks.com/vboard/s...d.php?t=341257 1968 chevy k/10 fleet http://67-72chevytrucks.com/vboard/s...d.php?t=334731 1948 desoto custom coupe fluid drive(family heirloom) Last edited by drivethechevy; 11-16-2008 at 12:18 AM.

11-16-2008, 10:20 AM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: rear axle and brake ?'s clunking may well be the rear U joint

11-16-2008, 06:04 PM	#3
drivethechevy Registered User Join Date: May 2007 Location: Buffalo MN Posts: 606	Re: rear axle and brake ?'s is there a simple way to check if it is the u-joint making the sound? __________________ Trial and Error, its expensive but its a mistake i most likely wont make again 1971 chevy k10 custom deluxe http://67-72chevytrucks.com/vboard/s...d.php?t=341257 1968 chevy k/10 fleet http://67-72chevytrucks.com/vboard/s...d.php?t=334731 1948 desoto custom coupe fluid drive(family heirloom)

11-16-2008, 06:12 PM	#4
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,886	Re: rear axle and brake ?'s Put it in neutral,set the parking brake.crawl under there and give the drive shaft a good twist back and forth with both hands and watch the u-joint.If you don't see and play,place one hand on the joint so you can feel both sides and twist the shaft with the other and if you can perceive ANY differential in movement indicating looseness,replace it. To check the front one just twist the two sides in different directions and watch/feel. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. Last edited by WorkinLonghorn; 11-16-2008 at 06:15 PM.



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