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Positive thinking ...
We are still asking:
What did you
get done on
your Bolt today
????


The question, initially posted May 23, 2005, was:
"Whatcha do on your Bolt
this weekend?"

After 51,906,997 views, 7378 replies over 185 pages, this thread in General Truck Talk is a happening! And it's not just weekends anymore.


Now with pictures
and No BOTS.


So ...


What did you get done on your Bolt today????


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Re: 14 bolt axle swap info
Grigg #1340896 Tue Jan 07 2020 05:55 PM
Joined: May 2019
Posts: 5
S
New Guy
I am doing the 14 bolt conversion on my 1951 GMC 253-22, I acquired a 1976 C&C axle for $100. I am going to utilize the drum brake conversion to single wheel 13x3.5, I am in the process of having two spacers made for the backing plate. I found, through Summit, Currie spring pads, 2 inch width, 3 inch tube size, also having them machined to 3.375. The hardest part so far has been the removal of the old spring pads. The rear came with 3.73 gears but unfortunately water got inside and ruined the gears, so I am converting to 4.10. Also the spider gear cross snapped an end off and took out the carrier, so all new parts inside.

I will provide an update once I have the spacers, to see how everything is going to line up. The biggest problem I have with the HO72, are the brakes, the real reason for the 14 bolt swap, the rear is in really good shape otherwise.

My only concern about the 4.10 gears will be the loss of power from 5.13 gears but will like freeway speeds better. The current engine is a 248 bored .060 over.

Re: 14 bolt axle swap info
Grigg #1341201 Thu Jan 09 2020 03:47 PM
Joined: May 2005
Posts: 9,185
G
Grigg Offline OP
.
Sounds like a reasonable plan.
I doubt you feel a loss of "power" with the faster 4.10 gears. Actually I expect you will appreciate the improvement in how it drives on the highway so much you then wish you had the 3.73 gears you wanted to start with.

When you get a chance please start a new thread so we can follow along with your progress.
If you learn things that need incorporating in this thread then we'll add them here later.
I've noticed technical "how to" threads become less and less useful the longer they get.


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]
---All pictures [picasaweb.google.com]---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Re: 14 bolt axle swap info
Grigg #1341261 Thu Jan 09 2020 11:07 PM
Joined: May 2019
Posts: 5
S
New Guy
Thanks Grigg, I will start a new thread. documenting with pictures. I received the spacers today and they fit perfectly, so well done on the drawing.

Re: 14 bolt axle swap info
Grigg #1341289 Fri Jan 10 2020 01:50 AM
Joined: Feb 2013
Posts: 513
5
'Bolter
Wow Grigg!
Amazing research and engineering on your part! I have a headache just reading through it! The time and dedication you put into this well appreciated!
You never cease to amaze!
Jim

Last edited by 53 green 1- ton; Fri Jan 10 2020 01:52 AM.

Jim Schmidt.
Bucks County, Pa.
1953, 3804
Pix in Photobucket [s854.photobucket.com]
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