ScottNM Posted October 2, 2011 Share Posted October 2, 2011 My tranny cable from my old th 350 unit does not match up.Where it attaches to the TH400 linkage connection, the cable is to long. Do I have to order a "th400 cable" and take out the console and rerun everything or can I somehow make this work? Thanks Scott Quote Link to comment Share on other sites More sharing options...
robs70monte Posted October 2, 2011 Share Posted October 2, 2011 A TH400 actually has an electric switch for the kickdown. It is sometimes mounted on the carb linkage (in several different places) or can be mounted under the gas pedal (most common) The modulator controls shift points on the 400 til WOT then the detent system takes over and actuates the electric kickdown. The reason for this is because there isn't enough vacuum at WOT to operate the heavier 400 components. WOT shifts without the kickdown hooked up will cause the clutches to slip and they will wear out before you want them to. If I remember right there are aftermarket kits that replace the GM electric switch. rob Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted October 2, 2011 Share Posted October 2, 2011 turbo 400 tranny bracket is different, you need a new bracket Quote Link to comment Share on other sites More sharing options...
robs70monte Posted October 2, 2011 Share Posted October 2, 2011 oh wow i had a brain fart there shift cable not kick down my bad no i feel stupid lol Quote Link to comment Share on other sites More sharing options...
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