Wont stay in 3rd

[stock93]

I have an 83 with 4 speed manual trans. I'm pretty sure its the muncie version. Its jumping out of 3rd gear under load and when going from load to coasting. If I hold it in it will stay in gear. When it pops out of 3rd if I dont take the shifter to neutral before trying to put it back in gear it will grind. Any ideas what this would be? shift forks? syncros? Can I reach them through the cover on the side of the trans front left.

John

 

[tarussell]

I do not mean this in a bad way but search this subject . There is a whole bunch of great info on that problem .

It is very common and skip third gear until you can make repairs.
Tom

 

[BlueBlazer]

Shift fork was the fix for me.

 

[stock93]

I did search. I didnt find much on it. Maybe I should be typing in a different phrase. My main question was if its the shift forks can I reach them through the side cover?

Thanks
John

 

[tarussell]

The side PTO covers will not let you get at the forks.

You"ll need to remove the top cover - just as a note - the shifter needs to be in reverse to take the cover off.
HTH , Tom

 

[tarussell]

If I knew anything about computers I would seach and post up stuff for you but I absolutely suck at computer stuff - I am doing good to post a reply in a thread . It's a good thing I know more about mechanical stuff than the internet .......

Tom

 

[Cricket]

3rd Gear Jumpout - Here's an answer

Go to this link, read down to the section on Sm465 gear jumping. http://www.4wheeloffroad.com/brandpages/chevy/131_0208_tran/index1.html

 

[tarussell]

Look no farther - the article that "Jiminycricket" has brought up all the info you need in it . It addresses the three main problems and the solututions.

Tom

 

[BlueBlazer]

All that stuff is a waste of money IMO. They do not even mention worn forks as a problem, which worries me since they are supposedly experts.