[Bonecruncher]

My transmission will only shift from 1st to 2nd at high rpm's (with a strong kick at that) unless I really put the right foot into it when it would shift fairly smmothly.

I though I had narrowed it down to the vaccum modulator, so I replaced that today, but it still acts the same. (BTW, taking out the vacuum modulator will spill tranny fluid all over your head if your stupid enough to do it on-the-fly while lying directly under it.

)

I'm not too worried about the strong shift, but I'd like it to shift sooner than 3500 rpm.

Any suggestions?

P.S. There is pretty good suction from the tube off the intake, so I don't think/hope that that's the problem, but I have no way of actual measurement of vaccum.

 

[mbr]

If there is an adjusting screw in the modulator valve (take the vacuum line off and look inside) you can adjust it outward or remove it completely and it should shift sooner. Also remove the fitting on the intake, clean the threads and replace it with some teflon tape. Make sure the vacuum line is in good shape. The tiniest air leak will delay the shift.

 

[645]

unplug the kick down circut from the drivers side of the tranny, right behind the shift linkage, then drive it. if that fixes it, you have a short and is appling 12v all the time to the solonoid.

 

[Bonecruncher]

I adjusted out the screw a few turns and it improved it a ton.

Thanks