need driveline parts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Trucks · 02-29-2004, 04:34 PM

Hi, I bought a 68 GMC 3/4 ton 4x4 with a messed up rear end, when I get over 35mph it makes a nasty grinding noise. Also its 4.56 in back and 4.55 in front, too low for me. SO I figured If I replace both the front and rear with something not so "granny" I can at least do 65 mph I'd be happy. Do you have a diff that will work for me? The truck has leaf springs and I have swapped a whole tube before but not just the rearend. I have not done a front swap at all. Any help would be great!

Also Its second gear wont enguage, synchro ring? Should I repair it or replace it?

If I lifted it the cheapest way, and put say, 32" tires on could I go any faster? I could just replace the rear, same gears if I got big enough tires maybe. I'm in brownton MN

02-29-2004, 04:34 PM	#1
Trucks Is that a Chevy 69...? Join Date: Feb 2004 Location: Brownton MN Posts: 112	need driveline parts Hi, I bought a 68 GMC 3/4 ton 4x4 with a messed up rear end, when I get over 35mph it makes a nasty grinding noise. Also its 4.56 in back and 4.55 in front, too low for me. SO I figured If I replace both the front and rear with something not so "granny" I can at least do 65 mph I'd be happy. Do you have a diff that will work for me? The truck has leaf springs and I have swapped a whole tube before but not just the rearend. I have not done a front swap at all. Any help would be great! Also Its second gear wont enguage, synchro ring? Should I repair it or replace it? If I lifted it the cheapest way, and put say, 32" tires on could I go any faster? I could just replace the rear, same gears if I got big enough tires maybe. I'm in brownton MN __________________ Ahhhh, the wonderful sound of a rumbling V8.



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