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Re: 55 GMC Series 1 Project [Re: J Lucas] #1331417 Sun Oct 27 2019 08:20 PM
Joined: Oct 2019
Posts: 6
M
msmalley Offline OP
New Guy
Originally Posted by J Lucas
Welcome msmalley. What a nice truck. I'm looking forward to following your build. Just curious, where did you trailer it down from?

John

Hello John, I brought it down from South Dakota, it was purchased in Mitchel SD and spent most of its life in Rapid City sadly a lot of that was in a field.


1955 GMC Series 1
100 Series 1/2 Ton Long Bed
248 to a Hydramatic 100
Re: 55 GMC Series 1 Project [Re: tclederman] #1331422 Sun Oct 27 2019 08:38 PM
Joined: Oct 2019
Posts: 6
M
msmalley Offline OP
New Guy
Hi Ya all,

Thank you so much for the warm welcome and advice thus far I really appreciate it. I am relieved that there are so many out there willing to help, I have posted the same message on other boards and have not received any feed back. I thought that I would receive an email when there was a reply to my post but I haven't received any. I will check my settings. I will also post my technical questions in the correct forums. Really looking forward to kicking this off.


1955 GMC Series 1
100 Series 1/2 Ton Long Bed
248 to a Hydramatic 100
Re: 55 GMC Series 1 Project [Re: tclederman] #1331428 Sun Oct 27 2019 08:55 PM
Joined: Oct 2019
Posts: 6
M
msmalley Offline OP
New Guy
Originally Posted by tclederman
msmalley,

Welcome to Stovebolt.com
You might want to also check out oldGMCtrucks.com
That year GMC engine and dash/gauges are different from a Chevrolet truck.
Brakes and most front end parts would most likely be the same.

Most likely you have a 100 series - 1/2 ton?
A Maintenance Manual should be available from parts vendors.
Here is an early 1955 manual with info on the H-M transmission.

You might as well drain the transmission and put in the correct fluid.
I do not recall if there is a transmission filter (members here should know).
That is a complicated transmission, if it needs repair.
The good news is that it is a good/strong transmission - it might need repairs.

Look here in the Tech Tips for advice on checking out a new truck.

In the Tech Tips, look at the 3.55 Ring & Pinion conversion (for a 3.55 ratio, instead of the 3.90 ratio).
You would need to obtain a 1948-1953 ring-gear carrier (GMC or Chevrolet 1/2 ton).


Tim,

Thank you very much for all of the advice. Yes this is a 100 Series 1/2 ton, and I will check on the manuals. I have visited the OldGMCTrucks site, it was actually the first site I found in my search. I tried to join but I never received a confirmation email from them so I think that the site isn't active. I have gone thru the site and downloaded all the information that I thought was relevant to my truck. I am surprised at the lack of information available for older GMC's on the web. I will repost my drive train questions on the correct forum, but it sounds like it would be worth sticking with the original kit. I just didn't want to go through all of the time and work to keep it if it wasn't going to add any value.


1955 GMC Series 1
100 Series 1/2 Ton Long Bed
248 to a Hydramatic 100
Re: 55 GMC Series 1 Project [Re: msmalley] #1332215 Fri Nov 01 2019 10:10 PM
Joined: Jul 2018
Posts: 62
S
Steelonsteel Offline
Wrench Fetcher
Welcome , MS , and what a beautiful truck! Sounds like you’re settled down there in Katy.
I’m an old Texan myself, though long ago.
That deluxe model, with hydramatic, is to me , worth keeping original. What a pleasure to drive .
This must have been the very last GMC new design bodies! I feel the one piece windshield in the old body style in the 54 55
trucks was already a customized look. A rare and original, keep it, enjoy it!


I have a large carbon footprint. That’s why my wife makes me take off my boots in the house.
1963 Chevy half ton stepside short box 230
1954 GMC 3 ton 302
And several more Chevy camper and work trucks 1979 1987 1996
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