700R4 shifting questions

[gmule]

What would make a 700R4 shift hard between 1st and 2nd? It shifts so hard that if you don't let up it will snap your head back to the head rest
All of the other shifts seem normal. It is an 84 Blazer 5.7 4x4 stock 50,000 miles on rebuilt trans.

 

[heavy4x4]

Most likely your TV (throttle valve) cable is out of adjustment. Well...maybe....is it shifting from 1 to 2 at high rpms? That would be an indication of TV cable out of adjustment.
But, there are so many other factors. Has it done this since its rebuild? If so, the many ports and valves inside of the tranny could have been altered to give performance shifts (ie, they may have installed a shift kit). Give us some more info to go by.

 

[gmule]

It shifted fine when the transmission was replaced this started a couple of days ago. It shifts hard at any speed or rpm and it shifts really hard at higer rpms.

 

[Catman]

My '90 K5 did the same thing (up shift to 2nd) The TV cable adjustment made it shift like silk. /forums/images/graemlins/k5.gif /forums/images/graemlins/usaflag.gif

 

[gmule]

Anybody know how to adjust it?

 

[Catman]

Do a search for "TV cable" /forums/images/graemlins/usaflag.gif /forums/images/graemlins/k5.gif. At some point there is a link to a site with pics of how to do it. If that fails, read the shop manual. It's a 30 second procedure.

 

[gmule]

Thanks alot