2001 Ford Mustang Bullitt Transmission Swap - 50-Caliber Automatic - Tech

The manual lever position sensor is installed. Push the shift lever forward and then pull back two clicks for Neutral. Line up the sensor lines and bolt it on.

To install the new auto shifter, we hoisted up the center console and mocked it up.

The rear two mounting holes line up, but the front two were too narrow.

Stick shifters, hold your stomachs. The auto shifter fits like a glove-after all, Ford engineered it.

To mount the front of the shifter, we fabricated this bracket out of a piece of flat stock steel and drilled a couple of holes. Pretty simple stuff-just measure twice and cut once.

One major obstacle was the lack of a transmission wiring connection in the factory harness. As it turns out, Ford opted to leave it out on the manual cars, but we were able to pirate this one from a spare automatic harness that HP's Sean Story had stashed in his garage. Once we loomed it up, it simply connected to the transmission harness and the main harness up at the top of the engine bay. The BC Automotive guys said they would have a harness available by the time you read this.

With the Kooks headers fully assembled and bolted on, we were still able to fit the 4R70W into the car without much drama. A transmission jack is helpful here as it allows you to tilt the trans at different angles without worrying about it falling off the stand. Be sure to install the dipstick tube right before you bolt up the transmission.

The crossmember nut holders were moved for the Tremec application and must be returned to the stock locations.

The crossmember can then be installed and the O2 sensor wiring clipped in.

The shift interlock and shift linkage cables are installed next.

Our new harness is routed up to the rear of the engine bay on the passenger side and plugged in to the factory harness.