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2020

A New Year
A New Decade
A New Vision

Ring in the new with some quality time with your old truck! A great time to tackle a winter project. If you do not have access to your truck, start your parts list for spring!
The days are officially getting longer now, you know!

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Successful 3.55 installation #1336637 Fri Dec 06 2019 08:29 AM
Joined: Jun 2017
Posts: 124
P
posey Offline OP
Shop Shark
The attention to detail paid off reading several members instructions over and over to get every detail correct, took my 54 half ton Hydramatic out for a drive two or three times and she just gets better each time, well worth the money and the effort.

Last edited by posey; Fri Dec 06 2019 01:10 PM.
Re: Successful 3.55 installation [Re: posey] #1336673 Fri Dec 06 2019 04:44 PM
Joined: Jan 2002
Posts: 2,001
C
cmayna Offline
Shop Shark
Did mine a few years ago. Best thing I did to the rig. You will enjoy the higher gears.


Craig's '50 Chevy 3100 5 window
My truck
If I'm not working on my truck or VW camper, I'm fishing with the wife or smoking Salmon.
Re: Successful 3.55 installation [Re: posey] #1336827 Sat Dec 07 2019 09:17 PM
Joined: Dec 2019
Posts: 2
T
Thor Nogson Offline
Moderated
Hi posey and cmayna , I'm new here having taken on the restoration of a 52 3100 Panel for a friend , we want to do the mythical 3.55 rear end upgrade whilst keeping the truck as standard as possible , could either of you give any details , part numbers etc for the ring and pinion you used and where you got them . your help would be much appreciated , thanks John

Re: Successful 3.55 installation [Re: Thor Nogson] #1337039 Mon Dec 09 2019 02:08 PM
Joined: Jun 2017
Posts: 124
P
posey Offline OP
Shop Shark
I purchased mine through mothertruckertrucks, they used to sell outright but now use eBay. Very good experience, make sure you order the truck ring and pinion and not he car version.

It's listed as follows: 1940 1941 1947 1948 1949 Chevy GMC truck 3.55:1 Ring and Pinion Gears 1/2 ton GM

Re: Successful 3.55 installation [Re: posey] #1337044 Mon Dec 09 2019 02:26 PM
Joined: Sep 2001
Posts: 29,127
tclederman Offline
Boltergeist
Yes, the eBay listing is :
"1940 1941 1947 1948 1949 Chevy GMC truck 3.55:1 Ring and Pinion Gears 1/2 ton GM"

If that is the listing, the description is more extensive:
"New 3.55:1 ring & pinion gears for all 1940-1953 Chevy & GMC 1/2 ton trucks."

And, it could be noted that it will work on 1954 1/2 ton trucks, if you use an earlier ring-gear carrier?


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: Successful 3.55 installation [Re: posey] #1337079 Mon Dec 09 2019 06:59 PM
Joined: Jun 2017
Posts: 124
P
posey Offline OP
Shop Shark
New bearings also make a big difference on how well the assy. goes back together. I was fortunate to find all NOS american made
bearings for the pinion, axle and carrier all on Ebay. Dont forget a new Oakie bushing as well.

Re: Successful 3.55 installation [Re: posey] #1337083 Mon Dec 09 2019 07:14 PM
Joined: Sep 2010
Posts: 368
K
KEVINSKI Offline
Shop Shark
I will be getting my extra rear end and torque tube soon from the field it is in to take apart to look into the same swap my tube is a Canadian truck so will be looking for either a carrier or maybe drill the carrier to accommodate the ring gear.How did you order your gears from mother trucker I don’t see a website or are they on eBay under mothertrucker.


kevinski 1954 GMC 9300 Welcome to the virtual Garage
Re: Successful 3.55 installation [Re: posey] #1337090 Mon Dec 09 2019 08:10 PM
Joined: Jun 2017
Posts: 124
P
posey Offline OP
Shop Shark
Ebay, use the username I specify in my first response email

Re: Successful 3.55 installation [Re: posey] #1337093 Mon Dec 09 2019 08:23 PM
Joined: Apr 2005
Posts: 8,015
Justhorsenround Offline
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
You can contact him through PM here on Stovebolt. Mother.Trucker


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne 4dr 230 I-6 one owner (I’m #2)
‘39 Dodge Businessmans Coupe


"I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line" and lock up those on the wrong side of that line.

Re: Successful 3.55 installation [Re: posey] #1337095 Mon Dec 09 2019 08:33 PM
Joined: Jan 2013
Posts: 1,558
S
sstock Offline
Shop Shark
Yes, cant say enough good about the quality of the ring and pinion. If you want OEM smooth and quiet these gears are the answer. I too purchased all new pinion and diff bearings nos off ebay. Gear setup was straight forward, also a great time to install an okie bushing while it is all apart.
Steve


1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
https://www.youtube.com/watch?v=Bli...n05i04t1aokgm4p04jiwgffwhyyih5xbk0h00410
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration
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