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Username Post: Power Glide rear number question        (Topic#351950)
FortyNineCoupe 
Contributor
Posts: 410
FortyNineCoupe
Loc: Baltimore, MD USA
Reg: 10-03-09
07-09-18 05:12 PM - Post#2739493    

Hi everyone: As usual time gets away from me and I realize that I've been away from the fine experts over here for too long and I come back with a wacky question like today. Some of you may recall that I was able to get a PG rear from one of my friends to swap my 4.11 in my '49 Coupe to enhance my high speed driving experience. I haven't really done much with it so far this summer but I did work the brake drums off and started to clean the grease off of the housing and torque tube to reveal some interesting stuff. I tell everyone that the grease underneath any old vehicle goes a long way to help preserve everything under there and this is no exception. When I picked this up, my friend explained that it came out of a '54 Chevy and should bolt right up to my '49. When I scraped the grease off the other day it revealed the following:
IMG_20180706_133712332 by Mike, on Flickr
IMG_20180706_154701357 by Mike, on Flickr
IMG_20180706_154710483 by Mike, on Flickr
IMG_20180706_154719373_BU RST001 by Mike, on Flickr

The number I get off of this is 3698950 and when I did an internet search it tells me that this is a Corvette rear. Is this possible or did they use this rear in all PG applications for those years?
As is always the case, your help is greatly appreciated.

Mike
'49 Styleline DeLuxe Sport Coupe


 

raycow 
Honored Member
Posts: 27567
raycow
Loc: San Francisco, CA
Reg: 11-26-02
07-09-18 05:37 PM - Post#2739496    
    In response to FortyNineCoupe

In case you didn't already know, all Corvettes, including 1953-55, had open drive and not a torque tube. In its present form the pic you posted is most definitely NOT that of a Corvette rear. However, 3698950 is a correct casting number for the torque tube rear, so it would seem that the same casting could also be machined to produce the open drive center section.

FWIW, a real 53-55 Corvette center section will bolt to a 54-earlier torque tube rear axle housing to create an open drive conversion. You would also need to weld the spring seats to the axle housing so they can't swivel.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
bobt 
Contributor
Posts: 169

Loc: colonial heights va
Reg: 06-28-14
07-10-18 02:59 AM - Post#2739528    
    In response to FortyNineCoupe

Do some more cleaning and scraping. The number you are looking for is STAMPED on, not CAST on.



 
FortyNineCoupe 
Contributor
Posts: 410
FortyNineCoupe
Loc: Baltimore, MD USA
Reg: 10-03-09
07-10-18 04:05 AM - Post#2739530    
    In response to raycow

I didn't know that Ray.Thanks for the info. I'll continue cleaning and freshening this up before we do the swap.

Mike
'49 Styleline DeLuxe Sport Coupe


 
FortyNineCoupe 
Contributor
Posts: 410
FortyNineCoupe
Loc: Baltimore, MD USA
Reg: 10-03-09
07-10-18 04:06 AM - Post#2739531    
    In response to bobt

Thanks Bob. I'll look for the stamped numbers. Were you ever able to read my PM I sent to you?


Mike
'49 Styleline DeLuxe Sport Coupe


 
RAM_51 
"2nd Year" Silver Supporting Member
Posts: 4875
RAM_51
Loc: Yakima, WA. USA
Reg: 12-28-02
07-10-18 06:02 AM - Post#2739542    
    In response to bobt

  • bobt Said:
Do some more cleaning and scraping. The number you are looking for is STAMPED on, not CAST on.






Attachment: Rear_Axle_Stamp.jpg (74.4 KB) 3 View(s)




1951 Fleetline
'51 Fleetline DeLuxe 2 DOOR SEDAN (Fathom Green)
'51 Styleline Special BUSINESS COUPE (Shadow Gray)
'53 6500 Dump Bed (Oxidized Red)
'50 Styleline DeLuxe 4 DOOR SEDAN (Mist Green)


 
bobt 
Contributor
Posts: 169

Loc: colonial heights va
Reg: 06-28-14
07-10-18 01:18 PM - Post#2739584    
    In response to RAM_51

The numbers are STAMPED into the front of the center section, right side, between the 8:00 and 10:00 o'clock bolts. The first letter is-
H = 1950
J = 1951
k = 1952
l = 1953
M = 1954
The next two letters will be-
A or B = 4:11
S or T = 3:55
L or M = 3:70
I hope this helps.



 
FortyNineCoupe 
Contributor
Posts: 410
FortyNineCoupe
Loc: Baltimore, MD USA
Reg: 10-03-09
07-11-18 12:53 PM - Post#2739700    
    In response to bobt

Thanks for the info. Apparently my friend was right and according to the code (MT 524) it's a 1954 3.55. What do the three numbers indicate?

IMG_20180711_151518932 by Mike, on Flickr
IMG_20180711_151528946 by Mike, on Flickr

Mike
'49 Styleline DeLuxe Sport Coupe


 
raycow 
Honored Member
Posts: 27567
raycow
Loc: San Francisco, CA
Reg: 11-26-02
07-11-18 01:25 PM - Post#2739705    
    In response to FortyNineCoupe

I believe those three digits are the assembly date, that is, May 24.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
bobt 
Contributor
Posts: 169

Loc: colonial heights va
Reg: 06-28-14
07-11-18 02:00 PM - Post#2739710    
    In response to raycow

Yes. You have a 1954 3:55 rear end assembled on May 24



 

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