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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Z71Gladiator on June 21, 2013, 05:39:35 pm

Title: What kind of transmission?
Post by: Z71Gladiator on June 21, 2013, 05:39:35 pm
How do I find what kind of transmission I have and will a 350 small block transmission bolt right up to a 454 big block

The truck is a 76 k10 4x4 with a 350 and standard transmission.

The transmission has 3 regular drive speeds plus granny gear.

The granny gear is where 1st gear normally is at the top left.
Title: Re: What kind of transmission?
Post by: 74 C-10 Shorty on June 21, 2013, 07:30:44 pm
A TH350 will bolt up to small block, big block and IL6 all have the same bolt pattern.
Title: Re: What kind of transmission?
Post by: jaredts on June 21, 2013, 08:13:08 pm
You can id a chevy transmission by the pan in most cases.  Google chevy transmission identification or something similar and you should get pictures of pans.  If you are putting a big block in you may want to start hunting down a built transmission for the purpose.  I think a th400 is the only trans I would trust in stock form behind a big block.
Title: Re: What kind of transmission?
Post by: zieg85 on June 21, 2013, 08:18:32 pm
To answer your question you are describing a SM465 manual transmission with the granny low
Title: Re: What kind of transmission?
Post by: HAULIN IT on June 21, 2013, 08:44:35 pm
Yes, your describing a SM465 trans. The 454 will bolt up to the bellhousing without any problems. One concern you will have to deal with is the flywheel...the 350 engine has an internal balance & the 454 is external balance. Lorne
Title: Re: What kind of transmission?
Post by: Irish_Alley on June 21, 2013, 11:02:10 pm
x3 about the sm465
Title: Re: What kind of transmission?
Post by: Captkaos on June 22, 2013, 12:36:23 am
Quote from: jaredts on June 21, 2013, 08:13:08 pm
Google chevy transmission identification or something similar and you should get pictures of pans. 

Auto trans ID's are in the tech pages:
http://forum.73-87chevytrucks.com/smforum/index.php/topic,11124.0.html