IDENTIFY THIS SECTOR SHAFT !

[ColAdo82K5]

Hey,
So I tried to install a 2wd sector shaft into my 4wd box, and after over an hour of trying, i realized i had the wrong one. So what is this sector shaft from ???? "Dr. Todd" and I figure it must be from a different ratio box.
http://community.webshots.com/photo/61561424/189256643ktyJRS
Any thoughts ?

Blake

 

[az-k5]

Maybe a manual 2wd box?

 

[ColAdo82K5]

Looked into that, and the top plate take goes with the shaft is completely different on a manual box.
Oh well....
Blake

 

[JDNobodi]

I'm not sure, but I've read some where that later (81-up) model boxes are variable ratio. Your old 4wd shaft is from a variable ratio box. Your new shaft is a non variable ratio box.

 

[84_Chevy_K10]

GM didn't use variable rate power assist until WELL into the '90s on pickups.

 

[JDNobodi]

[ QUOTE ]
GM didn't use variable rate power assist until WELL into the '90s on pickups.

[/ QUOTE ]
I don't know about you, But I looked at the picture and that old 4wd sector shaft IS from a variable ratio box. That means variable ratio boxes were avialable earlier than what you said should be.

When I said I not sure, I meant I wasn't sure what year when GM started putting variable ratio boxes on their trucks. But I now do know now at least 1982 because that is what year ColAdo82K5's blazer is.

 

[84_Chevy_K10]

How does changing fluid flow vary the ratio of a gearbox?

 

[JDNobodi]

Variable ratio streering boxes isn't variable by the fluid pressure but by the gearing in the box. A tale-tell sign of a variable ratio box is the longer middle tooth on the sector shaft.

Variable ratio boxes provide a slower ratio for the center one-half turn for precise streering and quicker ratio as the streering wheel is turned beyond that.

 

[ColAdo82K5]

Thanks for the info.
Blake