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#890947 - Sun Oct 21 2012 08:38 AM Help Identifing rear diff  
fiftee3  Offline
Wrench Fetcher
Joined: Oct 2012
Posts: 99
Somerset County, NJ
Hello, First post here. Have a 53. Here is a pic of the rear which I cant seem to identify. Has two bumps at 11:00 and 7:00 on rear cover. Can't find numbers on it. From what I've read, its an open rear so it cant be original, correct?
Here are the photos...
http://fiftee6.com/fiftee6_015.htm

Thanks, Phil



#890958 - Sun Oct 21 2012 09:44 AM Re: Help Identifing rear diff [Re: fiftee3]  
tclederman  Offline
Joined: Sep 2001
Posts: 25,120
Jarvisburg, NC
Phil,

A 1953 car and a 1953 1/2 ton truck would have had an enclosed driveshaft.

Larger 1953 trucks would have had an open rear end.

Maybe someone can ID what you have from that photo. Post any codes on the body of the rear end and maybe someone can help with those?


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 46 years
1954 3104 5-window pickup w/Hydra-Matic
Z-series (54/55) GMC 350 (2-ton) COE
If you have to stomp on your foot-starter, either you, or your starter, or your engine, has a problem.

#890959 - Sun Oct 21 2012 09:47 AM Re: Help Identifing rear diff [Re: fiftee3]  
Kurt_51carryall  Offline
Shop Shark
Joined: Aug 2011
Posts: 889
Raleigh,NC
Phil,

Is this a 1/2 ton or 3/4 ton? If 3/4 ton with the 8 lug wheels, It will be open drive shaft.

Kurt


#890962 - Sun Oct 21 2012 09:50 AM Re: Help Identifing rear diff [Re: fiftee3]  
fiftee3  Offline
Wrench Fetcher
Joined: Oct 2012
Posts: 99
Somerset County, NJ
it is 1/2 ton/3100. But maybe this is out of a 3/4 and changed to 6 lug? I'm just trying to figure out what year and what 10 bolt it is. Was also trying to figure ratio, but I guess I'll have to pull the cover and count teeth. Its leaking anyway!


#890964 - Sun Oct 21 2012 09:51 AM Re: Help Identifing rear diff [Re: fiftee3]  
fiftee3  Offline
Wrench Fetcher
Joined: Oct 2012
Posts: 99
Somerset County, NJ
Can't seem to find codes either?


#891013 - Sun Oct 21 2012 02:25 PM Re: Help Identifing rear diff [Re: fiftee3]  
LONGBOX55  Offline
Master Gabster
Joined: May 2006
Posts: 9,470
DANVILLE IL
It's a '55-'62 HO33 from a 1/2 ton truck. There should be a code stamped on the passenger side of the 3rd member. That code will give the ratio, though most likely it will be a 3.90.


Bill Burmeister

#891058 - Sun Oct 21 2012 06:42 PM Re: Help Identifing rear diff [Re: fiftee3]  
fiftee3  Offline
Wrench Fetcher
Joined: Oct 2012
Posts: 99
Somerset County, NJ
Thanks Bill,
Found numbers / 3707340 D2 Is this 3:90,s or 3:70,s?
And if 3:90,s what will be top speed on the 216 and max rpms approx.? Sorry, this dipper engine thing is all new to me! I met a guy at a carshow Saturday and he has a 235 from a 57 he'd let go for 300.00. But I actualy like the 216 now that I have it running!
Phil...


#891061 - Sun Oct 21 2012 06:54 PM Re: Help Identifing rear diff [Re: fiftee3]  
Flxible  Offline
Boltergeist
Joined: Feb 2002
Posts: 16,453
north of the 49th
there was no 3.70, the standard was 3.90 with an optional 4.11 .... if you want the engine to last a long time, it'd be "comfortable" at 2500 and a max of 3000, and don't expect to be cruising at more than 55, especially with stock brakes

Bill


"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
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