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Mod | | | Forums66 Topics128,049 Posts1,055,691 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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with Ads!  Again, thanks!
| | | | Joined: Feb 2010 Posts: 17 New Guy | | New Guy Joined: Feb 2010 Posts: 17 | I have a 1963 c30 flatbed dully that i am starting to restore. I want to up date my rear end so i can drive on the highway with today's tires at today's speed.Is there a later model rear end that i can install in my truck. | | | | | Joined: Oct 2011 Posts: 34 New Guy | | New Guy Joined: Oct 2011 Posts: 34 | is your rear axle a Eaton or Dana , i found myself forsale a 1967 c30 the rear axle most likey 514 so im going to put in 457 or 411 when i get the truck , if you have Eaton 457 or 411 if you have a Dana 456 or 410 , im not sure about 373 , no one wants 617 538 514 of Eaton 513 of Dana , in the mid late 70s when they came out with the 14 bolt rear axle and still made the Dana but stop making the Eaton , i am Allen im in FL for now | | | | | Joined: Mar 2008 Posts: 1,775 'Bolter | | 'Bolter Joined: Mar 2008 Posts: 1,775 | Heavychevy.com has a 3.90 and 4.10 gears for 62-72 trucks, try giving them a call. | | | | | Joined: Feb 2010 Posts: 17 New Guy | | New Guy Joined: Feb 2010 Posts: 17 | It's a eaton! Didn't know if it would be cheaper to Chang out the gears or swap the rear end. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | GM 14 bolt FF axles are usually $150. or so around here, good ratios.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Mar 2008 Posts: 1,775 'Bolter | | 'Bolter Joined: Mar 2008 Posts: 1,775 | Since I posted last, I have purchased a full floating 14 bolt rearend. They have more gearing options and parts are readily available. | | | | | Joined: Feb 2010 Posts: 17 New Guy | | New Guy Joined: Feb 2010 Posts: 17 | Thanks guys i appreciate the help!I do have a couple of u-pull it's near me, what vehicles did those gm full floating axle's come in and do i need pacific year thanks.
Last edited by bill 63; 09/28/2012 8:56 PM.
| | | | | Joined: Mar 2008 Posts: 1,775 'Bolter | | 'Bolter Joined: Mar 2008 Posts: 1,775 | Bill- Try finding one from a dually truck. Most of them are 63" WMS-WMS (Wheel mounting surface-Wheel mounting surface). Your Eaton axle under your truck now is 62.5 WMS. As far as years, anything from 72 to present should work. | | | | | Joined: Feb 2010 Posts: 17 New Guy | | New Guy Joined: Feb 2010 Posts: 17 | Thanks! will go this weekend and see what i can find. | | | | | Joined: Mar 2000 Posts: 137 'Bolter | | 'Bolter Joined: Mar 2000 Posts: 137 | See note
Last edited by Grigg; 10/08/2012 7:42 PM. Reason: please use swap meet or PM to buy/sell items on this forum.
| | | | | Joined: Feb 2010 Posts: 17 New Guy | | New Guy Joined: Feb 2010 Posts: 17 | I found a 87 Chevy 1 ton with a full floating 14 bolt rear end,and the price was great to! free | | |
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