Autoshift C4 or C6

[FireSale]

I looked this one up and the VB is available for purchase stand alone and bolt in. The C4 comes in two flavors designated by year and the input shafts are different so check the part# on your trans before you do anything. This is a bit difficult to figure. The description read auto shift in D with manual on demand but the instruction download gives directions for installing a TB making it a full manual shift. Other parts of the documentation indicate auto shift for AOD.

PA makes good stuff. I use their internal TB valve body, shift solenoid and roller bearing upgrades. My roller kit included an upgraded piston for the rear solenoid because they had been seeing breakage here. It was massive.

That said, documentation and customer support, not so.

$420 for 65-69 C4
$320 for 70 and up
$300 for C6 up to 76

I ran a TCI Street Fighter with a full manual TB valve body and 3500 stall converter on the street and towed a trailer to the strip for two years with no issues other than trans heat in heavy traffic. My advice is skip the autoshift and spare the wrath of the three pedal racers.