I would like to date my Turbo400 and 12 bolt limited slip ... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Zone47 · 05-06-2017, 06:42 AM

.... to see what year they are.

I tried waving flowers at them but they don't seem interested.

(sorry, had to get that out of the way).

I'm pretty sure the truck (68 C10) came with a 6 popper and 3 speed on the column, so the turbo 400 is out of something else and I doubt they would put a 12 bolt into a 6 cylinder truck.

Anyone know where the numbers are on either and how to decode them? Thanks.

jessemthompson · 05-06-2017, 07:06 AM

I don't have the answer for deciding your trans, but I can certainly tell you that the 12 bolt in your truck is more than likely stock. Chevy did put 12 bolts in 6cyl. trucks.

**GR8-68** · 05-06-2017, 07:20 AM

Jesse is correct, the 12 bolts was probably one of the most common rear axles in this era of truck including the 6 with 3

You should be able to look the code up for each and be able to know the year.

**halfstep** · 05-06-2017, 07:24 AM

There is a small aluminum ID on the passenger side of the trans that will get you all the information you want. You'll just have to look up the codes online. Name: TH400IDTag.jpg
Views: 3772
Size: 54.2 KB

Name: TH400IDTag.jpg
Views: 3772
Size: 54.2 KB

**DeadheadNM** · 05-06-2017, 09:28 AM

Fwiw my 72 Blazer has its original th350 and it does not have an ID tag - the date code is stamped into the oil pan as shown here: http://67-72chevytrucks.com/vboard/s...8&postcount=60

Zone47 · 05-06-2017, 10:04 AM

How surprising on the 12 bolt, and how cool is that! It's a tall gear I think. I spun the driveshaft 3 times and the wheels only went around once (wheels going the same direction).

Thanks, I'll climb under today and see what I can find out number wise.

05-06-2017, 06:42 AM	#1
Zone47 Registered User Join Date: Sep 2014 Location: Richfield, Oh Posts: 112	I would like to date my Turbo400 and 12 bolt limited slip ... .... to see what year they are. I tried waving flowers at them but they don't seem interested. (sorry, had to get that out of the way). I'm pretty sure the truck (68 C10) came with a 6 popper and 3 speed on the column, so the turbo 400 is out of something else and I doubt they would put a 12 bolt into a 6 cylinder truck. Anyone know where the numbers are on either and how to decode them? Thanks.

05-06-2017, 07:06 AM	#2
jessemthompson Registered User Join Date: Nov 2011 Location: Williamsburg, VA Posts: 960	Re: I would like to date my Turbo400 and 12 bolt limited slip ... I don't have the answer for deciding your trans, but I can certainly tell you that the 12 bolt in your truck is more than likely stock. Chevy did put 12 bolts in 6cyl. trucks. Last edited by jessemthompson; 05-06-2017 at 04:55 PM.

05-06-2017, 07:20 AM	#3
GR8-68 Senior Member Join Date: Jun 2009 Location: Belews Creek , NC Posts: 4,220	Re: I would like to date my Turbo400 and 12 bolt limited slip ... Jesse is correct, the 12 bolts was probably one of the most common rear axles in this era of truck including the 6 with 3 You should be able to look the code up for each and be able to know the year. __________________ Larry It is easily overlooked that what is now called vintage was once brand new. "Project 68" paypal.me/ldgrant

05-06-2017, 07:24 AM	#4
halfstep Registered User Join Date: Feb 2015 Location: Maryland Posts: 246	Re: I would like to date my Turbo400 and 12 bolt limited slip ... There is a small aluminum ID on the passenger side of the trans that will get you all the information you want. You'll just have to look up the codes online.

05-06-2017, 09:28 AM	#5
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,449	Re: I would like to date my Turbo400 and 12 bolt limited slip ... Fwiw my 72 Blazer has its original th350 and it does not have an ID tag - the date code is stamped into the oil pan as shown here: http://67-72chevytrucks.com/vboard/s...8&postcount=60 __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

05-06-2017, 10:04 AM	#6
Zone47 Registered User Join Date: Sep 2014 Location: Richfield, Oh Posts: 112	Re: I would like to date my Turbo400 and 12 bolt limited slip ... How surprising on the 12 bolt, and how cool is that! It's a tall gear I think. I spun the driveshaft 3 times and the wheels only went around once (wheels going the same direction). Thanks, I'll climb under today and see what I can find out number wise.



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