Thanks for the help guys! I had two issues... the governor was sticking and my detent cable was not set up properly.
Once I got it all working, I promptly burned up 4th gear and destroyed the OD drum. I learned the hard way that if you are making any substantial HP, never shift into 4th at wide open throttle! The OD just cant handle it even if it has the wider band.
Second time around, I had it rebuilt locally by Gene Hughes using a custom valve body and a high performance kit from Broader Performance. The custom valve body allows me to hold the 1-2 shift and the 2-3 shift; then it will shift to 4th only once I let off the gas which prevents it from ever going into OD at WOT. I can also use a regular 3-speed shifter with a 1-2-D-N-R-P pattern. I highly recommend the Broader Performance valve body and it costs only $200.00.
My AOD now works prefectly. It shifts like a C4 1st - 3rd and then has the overdrive for highway cruising.
Thanks again for the great article!
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'67 Mustang coupe
425W-KB Forged 10.2:1-AFR 205's-Victor Jr.-Mighty Demon 825-Joe Sherman spec'd Comp Cams HR -Miller rockers-Hooker Super Comps-3" exhaust-Gene Hughes AOD-3.55 Posi-4wheel disc brakes- 423RWHP @5600/ 448RWTQ @4400