Rear End Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**The Rocknrod** · 06-18-2015, 10:31 PM

On my 64 Stepside - I have a WC 6 17 stamped on it. Does that mean a Posi 3.73?
And what does the 6 17 mean?

Uptown83 · 06-18-2015, 11:39 PM

Yep.

par4tom · 06-19-2015, 12:34 AM

Wc is the code for the 3.73 posi. The 6 17 most likely refers to the month and date the axle was produced. I wish I could help you on the production date Bette as my axel is an hc 08 06 meaning posi August 1966

**The Rocknrod** · 06-19-2015, 04:55 AM

Thank you par4tom - I guess these numbers don't mean much:

1963c-10 · 06-19-2015, 08:48 AM

Factory spec sheets show it as a 3.73 posi date coded June 17

3838227 is the part # for 12 bolt rear end and will be 17 spline axles

BOE · 06-19-2015, 03:43 PM

I have a c10. would that be the same as c14 or c15?

1963c-10 · 06-19-2015, 03:45 PM

Quote:

Originally Posted by BOE

I have a c10. would that be the same as c14 or c15?

Would depend if its a short wheel base or long wheel base.

115" = 14
127" = 15

This is for half tons.

BOE · 06-19-2015, 03:55 PM

thank you for that imfo. looks like i have a 15. meant to ask some one sooner but don't like looking ignorant.

1963c-10 · 06-19-2015, 04:03 PM

Quote:

Originally Posted by BOE

thank you for that imfo. looks like i have a 15. meant to ask some one sooner but don't like looking ignorant.

No problem. Theres plenty of info and knowledge on the forum so if you can't find it in a search just feel free to ask. We're all here to help each other and preserve the trucks, info and history that we can.

**aerotruk63** · 06-19-2015, 05:03 PM

There's no such thing as looking ignorant. Even the most experienced members can discover something new.

1963c10 isn't it interesting to see a page listing 61-66, yet, it doesn't list the H Freemont plant!

par4tom · 06-19-2015, 05:33 PM

Was Fremont even on line at that time? My 61 shows a 1c14401010xx vin, and the sheet I looked at to verify the vin doesn't even show Oakland as a plant...

63longfleet · 06-20-2015, 02:04 PM

where at on the diff. is that stamped? Mine is kinda crusty lol and i dont want to have to scrape off all of it to find it . THanks

**The Rocknrod** · 06-20-2015, 04:09 PM

Mine is at the rear of the tube on the Drivers side of the pumpkin.

OldChevy61 · 06-23-2015, 09:03 PM

Found one like this on craigslist . What would it be worth in good condition.

06-18-2015, 10:31 PM	#1
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Rear End Question On my 64 Stepside - I have a WC 6 17 stamped on it. Does that mean a Posi 3.73? And what does the 6 17 mean? __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

06-18-2015, 11:39 PM	#2
Uptown83 Registered User Join Date: May 2015 Location: Las Cruces, NM Posts: 38	Re: Rear End Question Yep.

06-19-2015, 12:34 AM	#3
par4tom Registered User Join Date: Nov 2012 Location: Kingsburg CA Posts: 581	Re: Rear End Question Wc is the code for the 3.73 posi. The 6 17 most likely refers to the month and date the axle was produced. I wish I could help you on the production date Bette as my axel is an hc 08 06 meaning posi August 1966 __________________ My Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=705185 How to Get Audiophile Sound in 60-66 Trucks http://67-72chevytrucks.com/vboard/s...=1#post7236896 Building Your Own Speaker Kick Pods http://http://67-72chevytrucks.com/vboard/showthread.php?t=730495

06-19-2015, 04:55 AM	#4
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Rear End Question Thank you par4tom - I guess these numbers don't mean much: __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

06-19-2015, 08:48 AM	#5
1963c-10 Registered User Join Date: Nov 2011 Location: fayetteville nc Posts: 10,338	Re: Rear End Question Factory spec sheets show it as a 3.73 posi date coded June 17 3838227 is the part # for 12 bolt rear end and will be 17 spline axles Attached Images __________________ 1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer Last edited by 1963c-10; 06-19-2015 at 08:58 AM.

06-19-2015, 03:43 PM	#6
BOE Registered User Join Date: Apr 2015 Location: denver colorado Posts: 52	Re: Rear End Question I have a c10. would that be the same as c14 or c15?

06-19-2015, 03:55 PM	#8
BOE Registered User Join Date: Apr 2015 Location: denver colorado Posts: 52	Re: Rear End Question thank you for that imfo. looks like i have a 15. meant to ask some one sooner but don't like looking ignorant.

06-19-2015, 05:03 PM	#10
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,627	Re: Rear End Question There's no such thing as looking ignorant. Even the most experienced members can discover something new. 1963c10 isn't it interesting to see a page listing 61-66, yet, it doesn't list the H Freemont plant! __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1

06-19-2015, 05:33 PM	#11
par4tom Registered User Join Date: Nov 2012 Location: Kingsburg CA Posts: 581	Re: Rear End Question Was Fremont even on line at that time? My 61 shows a 1c14401010xx vin, and the sheet I looked at to verify the vin doesn't even show Oakland as a plant... __________________ My Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=705185 How to Get Audiophile Sound in 60-66 Trucks http://67-72chevytrucks.com/vboard/s...=1#post7236896 Building Your Own Speaker Kick Pods http://http://67-72chevytrucks.com/vboard/showthread.php?t=730495

06-20-2015, 02:04 PM	#12
63longfleet Registered User Join Date: Nov 2014 Location: oklahoma city Posts: 108	Re: Rear End Question where at on the diff. is that stamped? Mine is kinda crusty lol and i dont want to have to scrape off all of it to find it . THanks

06-20-2015, 04:09 PM	#13
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Rear End Question Mine is at the rear of the tube on the Drivers side of the pumpkin. __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

06-23-2015, 09:03 PM	#14
OldChevy61 Registered User Join Date: Apr 2015 Location: NICHOLS SC Posts: 435	Re: Rear End Question Found one like this on craigslist . What would it be worth in good condition.



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