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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: heathershubby on February 25, 2009, 01:29:32 pm

Title: How do I find out what Transmissiom, Tcase, and Engine I have in my 78 K10
Post by: heathershubby on February 25, 2009, 01:29:32 pm

Hello everyone new guy here so be easy on me.  I have a 1978, k10, Reg. Cab, longbed that I use mainly as a farm truck.  My tranny is slipping and I want to replace it with a rebuild but I don't know how to find out which tranny I need.  I have good reason to believe my truck has been pieced together so I don't trust the VIN#.
Where, or is there a place on the Engine, Tranny, and Tcase I can look to see what exactly I have?  I was told by the person I bought it from it had a 350 but how do I know for sure. It would probably be easier just to find another truck for what it would cost to replace everything but I love the body style, and the truck and don't mind working on it.  Thanks for the help.

Title: Re: How do I find out what Transmissiom, Tcase, and Engine I have in my 78 K10
Post by: frogman68 on February 25, 2009, 01:42:14 pm

look at the tranny pan
which one is it ?
(http://www.nastyz28.com/pictures/transpan.gif)

transfer case should have a tab on it you can  see looking from the rear forward most have a red band on em (the tab)

Title: Re: How do I find out what Transmissiom, Tcase, and Engine I have in my 78 K10
Post by: heathershubby on February 25, 2009, 01:48:58 pm

Thanks! Is there away to find out what Tcase I have if I don't have a tab on it?  I can't go look and see right now but I will when I get home.

Title: Re: How do I find out what Transmissiom, Tcase, and Engine I have in my 78 K10
Post by: fitz on February 25, 2009, 02:29:08 pm

Welcome to the site. As far as the transfer cage goes:
205- Cast iron.
203- Cast iron with an aluminum section for the output shaft.
208- Aluminum.
Do you have any pictures of the t-case or the shifter?

Title: Re: How do I find out what Transmissiom, Tcase, and Engine I have in my 78 K10
Post by: Captkaos on February 25, 2009, 02:33:58 pm

This is a post on how to ID the trans:
http://forum.73-87chevytrucks.com/smforum/index.php?topic=11124.0

Title: Re: How do I find out what Transmissiom, Tcase, and Engine I have in my 78 K10
Post by: heathershubby on February 25, 2009, 02:47:44 pm

Thanks, I don't have any pictures right now of the Tcase but I think I can identify the Tranny and Tcase by the info provided. Now I need to identify what Engine it is, it'll be going out next, thanks for the help.

Title: Re: How do I find out what Transmissiom, Tcase, and Engine I have in my 78 K10
Post by: Captkaos on February 25, 2009, 03:59:13 pm

Any SBC engine will replace the current one regardless of size.  The only gotchas are some 305's and the 87-up one piece rear main.

Title: Re: How do I find out what Transmissiom, Tcase, and Engine I have in my 78 K10
Post by: hotrod24 on February 25, 2009, 09:55:36 pm

here is some links that will help you out if you have not found out what the transfercase and engine is but i have a 78 k10 to and i am going through the samething  ;)

what part of north carolina you from?

http://www.chuckschevytruckpages.com/drivetrains.html 

http://www.mortec.com/location.htm