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Adjusting Shift Points...

Wraparound

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Ever since I had my 700r4 rebuilt it has shifted hard from 1st to 2nd, even with slow acceleration. I never really cared until I blew out my rear end while cruising up to tahoe for a wedding. Is the process of adjusting shift points manageable for a transmission-phobic. I never mess with that thing but I want to tone it down a bit. What do you guys think? /forums/images/graemlins/truck.gif
 

88Silverado

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The part throttle shift points are set by the TV cable that attaches to the carb or throttle body.
It is adjustable. Having more tension on the cable will shift harder and at higher rpm's. However, there is a minimum pressure required. You must have 2-4psi pressure at idle with the carb plates closed, as you give it the gas, the pressure will come up securing the clutches, if you dont have enough base pressure, you will cook the trans.

The next question is did the rebuilder install a shift kit? If so, that could account for the harder shifts.

The governor controls shifts at WOT.

Heres a link on TV101
 

Wraparound

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They did, but at first it was extreme so they adjusted it. I was looking to lighten things up a bit more but this is one area of the truck that I do not know.
 

cybrfire

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Your best bet would be to take it back to them and have them adjust it again if they can. Wouldn't want to void your warranty or anything like that.
 

beater_k20

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firm shifts are a good thing. a smooth shifting trans is a slipping trans, it will shorten the life of a trans in a hurry.
 

Wraparound

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Warrenty is long gone. Firm is good, banging on slow accel is bad /forums/images/graemlins/frown.gif
 
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