automatic trans?

[br-549]

Greetings from NC, We own a 1949 Flxible bus with a GMC 401. I am wanting to explore changing from a 4 speed un- syronized (spelling) to a modern automatic trans. Yes the length is an issue. What bolts up? What's the options? Thanks in advance.

[Prowbar]

Hello, could you post a picture of the engine and bellhouding that you have?
I'm assuming it is a SAE 2? (number dictates the size) Bellhousing. Which has round flange and equally spaced bolt pattern.

[jbgroby]

following

[FetchMeAPepsi]

Modern? Get a rope!

1S828Y7Eais

[AZKen]

There is a set of parts to adapt a GMC V6 to automatic but don't know if the will do a 401. Seems like may be flywheel and ballance issues.

[Prowbar]

There is a set of parts to adapt a GMC V6 to automatic but don't know if the will do a 401. Seems like may be flywheel and ballance issues.

Shouldn't have any balance issues. The 401 is internally balanced. The 379, 432 and 478 have external balance.

https://transmissionadapters.com/products/gmc-v6-custom-vee-six?srsltid=AfmBOoolXNWVMZ28o9KFhQVV2Ri7-E4SdBhUFX9YCn9SVmdo6HDosfe_

This is the kit. It's expensive!

[Funky61]

Kool Link to TOMMR's


https://6066gmcclub.com/showthread.php?t=48742&highlight=motorhome