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| | | | Joined: Mar 2010 Posts: 50 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2010 Posts: 50 | I have a 4.63 ratio GM disk brake rear end with the 10 on 7.25 lug pattern
I understand that the wheel centers are slightly different (mine are a tad bit smaller), but other than that, is it a bolt in replacement for an older truck?
I want to put it up for sale, but want to make sure I know what I am talking about first.
Thanks! | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Modern Dana axles, like you have, have .25" larger hubs than the old ones with 10 on 7.25". I suppose one could bore out old style wheels, however, most choose to use modern tubeless wheels, 19.5's or 22.5's, since it is hard to get split rims in many places.
19.5" tires look undernourished on an old truck that had 20" split rims, so, it is best to look for 22.5's if that is ones application. One can use older nut plates on modern axles by boring them out to fit the modern hubs.
Ed
Last edited by EdPruss; 05/11/2016 1:02 PM.
'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: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Same pattern, the center bore changed from 4.75" up to 5.25" in approximately 1954-55.
Some very early trucks used same bolt circle and smaller yet center bore, also smaller lugs if I remember right. | | | | | Joined: Mar 2010 Posts: 50 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2010 Posts: 50 | I definitely can see how the 225-19.5 or the 8R19.5 tires could look out of place...
I was assuming that to keep the look and style of the vehicle with the modern axle and brakes, boring the 20's would be the most logical.
Actually, I may have a pair of 10 on 7.25 to 10 on 11.25" (standard heavy truck lug pattern) adapters for sale soon. Not sure if that is a desirable thing or not.
I have the axle now, adapters later.
Last edited by journeyman; 05/11/2016 8:34 PM.
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