[MissChevyLyn]

Hey there. Im at the point in my build where i need to send my transmission out to be re-built. However i dont know what lind of tranny i have exactly. I know i have a "4 on the floor" but have no idea on the actual specifications of the tranny. I was able to disconnect and pull it out yesterday. If anybody knows anything about these 4 speeds, PLEASE HELP!

 

[cfjfisher]

There should be numbers on the case. those will tell you what you have. The shop rebuilding it should know just by looking at it. Those were used in Chevy pickups for years I had one n 57 1ton. The case looks like SM420. Just wondering whats wrong with it? anim_25

 

[MissChevyLyn]

Im not to sure something is even wrong with it, but it has been sitting without the shift cover on, being exposed to the Colorado weather for a while now.

 

[cfjfisher]

It wouldn't hurt to go through it to be sure rust hasn't gotten to the bearings and shafts. You do have the cover right? Must have been a reason for taking it off.
anim_25