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Spindle swap opinions
#1344371 Fri Jan 31 2020 01:16 AM
Joined: Jan 2010
Posts: 109
J
jmlloar Offline OP
Shop Shark
I've been playing around with the idea of how to upgrade my front hubs and brakes on my 55.2 GMC 150 and wanted a few opinions.

1 Looking at either cutting the factory spindles to fit newer rotor bearing combo along with making caliper brackets

OR

2 Looking at just spindle and ect swap from a P30. it will get me everything in one shot, but should I ream the factory I beam out to match the larger kingpin (1/4 inch larger), or bushing the spindles for the smaller factory 55 kingpin???

OR

3 Swap the complete front axle assembly and narrow it to fit????

I seem to think number 2 is the easiest but not sure.


1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am
Re: Spindle swap opinions
jmlloar #1345750 Sun Feb 09 2020 08:40 PM
Joined: Jan 2010
Posts: 109
J
jmlloar Offline OP
Shop Shark
heres where I am so far.

Attached Files
rps20200209_153825.jpg (24.51 KB, 177 downloads)

1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am
Re: Spindle swap opinions
jmlloar #1345752 Sun Feb 09 2020 08:51 PM
Joined: Jan 2010
Posts: 109
J
jmlloar Offline OP
Shop Shark
top is 99 c2500 2wd pickup
middle is 55 3/4 ton
bottom is 8 lug trailer spindle.

99 3/4 ton rotor looks to be easy to adapt with just a simple set of sleeves to the factory spindle. And will use parts from any parts store if break down.

trailer 8 lug is the same with use of just a few sleeves but trailer hub although common is not as easy to find and should accept slip on rotors readily. A little more expensive this way but should work just as good for anyone who wants to keep drum brakes or disk swap you already have done.

both ways will gain modern seals and bearings.

you could probably even use the trailer swap with dual wheel rotors to do the same thing with a 1 ton dually without much difficulty..

Opinions and comments or any ideas or questions????


1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am
Re: Spindle swap opinions
jmlloar #1345993 Tue Feb 11 2020 06:24 PM
Joined: Jan 2010
Posts: 109
J
jmlloar Offline OP
Shop Shark
looks like trailer hubs are the best fit. they will add a little over an inch of width per side

if I use newer rotor hub combo it will add over 2.5inch per side.

On the plus side I will have more clearance at tie rod ends.


1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am
Re: Spindle swap opinions
jmlloar #1346000 Tue Feb 11 2020 07:09 PM
Joined: Feb 2004
Posts: 20,371
H
Boltergeist
It looks like the inner bearing of the trailer hub would be a big upgrade in weight bearing capacity, which would be a very good thing. The outer bearings appear to be about the same size, just by looking at the spindle diameter. Moving the wheel outboard an inch will affect the scuff radius a little, which will make the steering a bit twitchy due to changes in the steering geometry that can't be compensated for by wheel alignment.
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: Spindle swap opinions
Hotrod Lincoln #1346146 Wed Feb 12 2020 03:31 PM
Joined: Jan 2010
Posts: 109
J
jmlloar Offline OP
Shop Shark
I'm thinking that it wont be to noticeable since the newer wheels have more offset anyway. The actual change to scuff will be minimal since the pivot point is the king pin to centerline of tire. I will be going out a little over an inch at hub face but with an inch change in backspacing I would be right back at factory specs

Both bearings are actually about .25in larger on the inner diameter.
These hubs are for 7000# trailer axle so they will definitely be plenty strong.

Spacers/shims are settled on and are being made now. Soon as they get here and I can actually mount the hub I'll be able to get a more exact measurement on the track width change.

Guy said he can make these really cheap if anyone else wants to upgrade. Only custom piece will be the bearing spacers, rest is off the shelf parts.

Last edited by jmlloar; Wed Feb 12 2020 03:38 PM.

1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am
Re: Spindle swap opinions
jmlloar #1346155 Wed Feb 12 2020 03:46 PM
Joined: Feb 2004
Posts: 20,371
H
Boltergeist
It sounds like you've done your homework well- - - - -good on ya! I'd suggest securing the inner spacer to the spindle with some green Loctite to avoid any possibility of it spinning. Can't do that with the outer, so make sure the spacer is a snug fit, clearance-wise!
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: Spindle swap opinions
jmlloar #1346289 Thu Feb 13 2020 01:30 AM
Joined: Jan 2010
Posts: 109
J
jmlloar Offline OP
Shop Shark
guy took my spindles so that they can be a slight press fit. and Loctite.

Inner spacer will have the step in it for newer type seal, outer is just basically a piece of tube.


1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am
Re: Spindle swap opinions
jmlloar #1348814 Thu Mar 05 2020 01:15 AM
Joined: Jan 2010
Posts: 109
J
jmlloar Offline OP
Shop Shark
modified spindle
and spindle with hub test fitted

Attached Files
rps20200304_200503.jpg (45.97 KB, 90 downloads)
rps20200304_200528.jpg (48.4 KB, 89 downloads)

1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am
Re: Spindle swap opinions
Hotrod Lincoln #1348816 Thu Mar 05 2020 01:17 AM
Joined: Jan 2010
Posts: 109
J
jmlloar Offline OP
Shop Shark
Originally Posted by Hotrod Lincoln
It sounds like you've done your homework well- - - - -good on ya! I'd suggest securing the inner spacer to the spindle with some green Loctite to avoid any possibility of it spinning. Can't do that with the outer, so make sure the spacer is a snug fit, clearance-wise!
Jerry


Actually I can use Loctite on the outer since the inner bearing fits over the outer sleeve easily.


1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am
Re: Spindle swap opinions
jmlloar #1349551 Wed Mar 11 2020 02:03 PM
Joined: Jan 2010
Posts: 109
J
jmlloar Offline OP
Shop Shark
Now for a new can of worms, %$#$%# king pin bushings. What a PITA. So much for videos on half ton trucks. After destroying the first set I now know I need to ream them. Only problem is I would like to get my hands on the correct spiral ream tool. Anyone got the correct part number or a source for one similar to the factory one???


1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am
Re: Spindle swap opinions
jmlloar #1350377 Tue Mar 17 2020 05:13 PM
Joined: Jan 2010
Posts: 109
J
jmlloar Offline OP
Shop Shark
Found the correct one, non adjustable spiral ream.[img]http://[/img]

Attached Files
rps20200317_214419.jpg (40.47 KB, 19 downloads)
Last edited by jmlloar; Wed Mar 18 2020 01:47 AM.

1955 GMC 150, 1980 Chevy C10, 2011 Sierra 3500 HD SLT Duramax Dually Crewcab, 1960 Chevy BelAir 2dr sedan, 1978 Pontiac Trans-Am
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