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Best Options for front axle swap in a 41' 1.5ton
#1247331 Mon Dec 18 2017 02:05 PM
Joined: Nov 2015
Posts: 7
C
Capt D Offline OP
New Guy

I'm looking for alternatives on axels and wheel combinations. I currently have a 41 1.5 ton GMC with 20in wheels. I have read some of the threads regarding the P30 axle swaps. Is the P30 the only option or is there others? Any advice or information would be greatly appreciated. This may have been covered previously and I might have just overlooked it. Thanks for your time.


Re: Best Options for front axle swap in a 41' 1.5ton
Capt D #1247368 Mon Dec 18 2017 07:42 PM
Joined: Dec 2015
Posts: 2,114
Big Bolt Forum Moderator
Welcome to the site! I am not completely sure on different axle options but, if there is a truck wrecking yard in your area, it may be good to take a bunch of measurements on yours and then go to the wrecking yard and poke around. You may fine some other moving van or motorhome that has an axle that would work well in there.


Mike

1955 Chevy 6400 ex-flatbed (no bed now!)
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Re: Best Options for front axle swap in a 41' 1.5ton
Capt D #1247390 Tue Dec 19 2017 12:15 AM
Joined: Jun 2011
Posts: 3,628
E
Shop Shark
Front axles are narrower, so adding P-30 spindles makes sense. Get a 2 ton axle to start with.

Ed


'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.
Re: Best Options for front axle swap in a 41' 1.5ton
Capt D #1247463 Tue Dec 19 2017 01:15 PM
Joined: Nov 2015
Posts: 7
C
Capt D Offline OP
New Guy
Thank you for the information. I will continue to research this and try to find the best alternative. If I choose to stay with the original axle, what options do I have to go away from the original wheels? Preferably a 19.5. Current wheels are the 20in, 5 lug wheels.

Re: Best Options for front axle swap in a 41' 1.5ton
Capt D #1247508 Tue Dec 19 2017 06:28 PM
Joined: May 2005
Posts: 9,146
G
.
I've looked for and at different front axles for many years now. In my opinion the best fit (because truck is narrow) is the original axle, or one from same body style truck, larger or possibly smaller.

The sticky thread about axle and brake swap stuff is most all of what I know on the matter, and the short version is...
A 2 ton axle beam for your model truck will fit, (possibly even from 48-53?). With that axle beam you can adapt P-30 spindles, hubs, and brakes with very little effort.
See info and measurements in the sticky thread.

Wheels and tires have options too, and much info and discussion Here

Short version... 19.5" wheels may not fit over your rear drums, or they may, better check.
If they do fit they need a bushing to adapt the 5.25" center bore to your 4.75" hub (nominally).
19.5" wheels with 8R19.5 tires, as tall as fit the wheels, are still only 32-33", and may look small, it's up to you.
The original 20" wheels if in good shape can still be a good option.
22.5" wheels in this 10 lug on 7.25" bolt circle are old and hard to find, but do exist. 9R22.5" tire is about 38" tall.

Grigg


1951 GMC 250 in the Project Journals [stovebolt.com]
1948 Chevrolet 6400 [stovebolt.com] - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup [stovebolt.com]
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