1984 3 speed transmission

[Selo]

Gentlemen,

I have a 3 on the tree 1984 C10 with the original 250 inline 6. I bought it used in 1985. This truck is as basic as it gets. The only option installed was a step bumper.
The original 3 speed was replaced with what I think is an earlier model 3 speed (long story).
The current 3 speed is in need of a rebuild, but I'd rather rebuild and install the original transmission model. I am having difficulty determining the model 3 speed that would have been installed at the factory. I can't start looking for one until I know exactly what I'm looking for.
Any help will be appreciated.

 

[Ricko1966]

Gentlemen,

I have a 3 on the tree 1984 C10 with the original 250 inline 6. I bought it used in 1985. This truck is as basic as it gets. The only option installed was a step bumper.
The original 3 speed was replaced with what I think is an earlier model 3 speed (long story).
The current 3 speed is in need of a rebuild, but I'd rather rebuild and install the original transmission model. I am having difficulty determining the model 3 speed that would have been installed at the factory. I can't start looking for one until I know exactly what I'm looking for.
Any help will be appreciated.

Should be a sticker on the glove box door that gives the RPO code for the transmission the truck was built with. Post it someone will tell you what transmission you need.

 

[Keith Seymore]

Three on the tree = Saginaw Transmission

There were a couple different ones available based on first gear ratio.

www.gm.com/content/dam/company/no_search/heritage-archive-docs/vehicle-information-kits/chevrolet-trucks/1984-Chevrolet-Truck.pdf[/URL]

Option codes were M62 or M64.

K

 

[Selo]

Gentleman, thank you for taking the time to respond with helpful info. Selo

 

[Selo]

Hello again,

I am reviving this thread a bit. I have a different issue with the 3 speed. My truck is C10 2wd with 250 6cyl and 3 on the tree. Currently is rarely driven, but plan to drive it regularly.
The transmission was replaced back around 1997 with a GM 3 speed that I think is an earlier model trans. I just changed the diff. gear oil
and was planning to replace the 3 speed trans oil. I think the trans is some version of a Saginaw. I know that is a pretty safe guess! The issue is I can find the fill plug, but for the life of me can't find a drain plug. I figure its got to have one, but I can't find it. I feel like a d___b a__. Any of you fellows have any ideas? I plan to take pics to post tomorrow.

Cheers, Selo

 

[Turbo4whl]

https://67-72chevytrucks.com/vboard/showthread.php?t=348394

Bottom bolt on the tail housing or side cover.

 

[Selo]

Thank you Turbo! Very appreciated!