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Home/ Registry/ Ford/ Bronco/ 1966-1977/ “Alex's Silver Stallion”/ Explorer 5.0 and 4R70W swap supermotors.net/registry/29125/88760

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Explorer 5.0 and 4R70W swap

From 1973 Ford Bronco “Alex's Silver Stallion”, documented by muddybronco.

33 photos
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1973 Ford Bronco - This 1973 Ford Bronco is parked outdoors with trees in the background. 1973 Ford Bronco - Hurst Pro-Matic shifter from Craigslist. Has PRND21 which matches the 4R70W pattern since O/D is locked out with a button on the dash. The… 1973 Ford Bronco - Hurst shift cable mounted to the transmission lever with the end of the stock Bronco carburetor linkage welded to a nut that fit the cable.… 1973 Ford Bronco - Bosch 69100 fuel pump mounted low to feed off the carburetor style sending unit. WIX 33270 150 micron filter (screen) before the pump and G… 1973 Ford Bronco - Full engine bay harness from the Explorer. Starting to peel off the tape to see the rainbow inside. 1973 Ford Bronco - Chomp! Cut the main harness just past the relay box, which is in the area behind the driver's headlight. Removing the harness from the Expl… 1973 Ford Bronco - Ahhh, scary wiring! This is after cutting off the 3 firewall connectors. Lots of wires can be removed at this point because they went from… 1973 Ford Bronco - These are the wires I removed from C115 because they are not needed. It's cleaner to remove them rather than cut them and I can put one bac… 1973 Ford Bronco - Getting less scary! The 7 circuits left in place are in the split loom tubing. The big bundle of wires in the yellow zip tie are extras and… 1973 Ford Bronco - PDB mounting bracket cut and welded on backwards so that it mounts downward and the box sits over the bracket. To the right is the C115 mou… 1973 Ford Bronco - The 3 grounds from C115 ground to the old voltage regulator ground. I wire wheeled the metal bare then covered it in silicone grease to get… 1973 Ford Bronco - We used a piece of a broken aluminum yard stick to move the P/S reservoir down and back. It wasn't quite enough so we had to take a notch o… 1973 Ford Bronco - The EGR solenoid was too high (surprise, surprise... do a body lift first!) so we took the mounting bracket and flipped it 180 which moved… 1973 Ford Bronco - We took the MAF out of the airbox and mounted it to the fender. With a little help from the heat gun the 3" Spectre intake boot slid right… 1973 Ford Bronco - The air filter came with the plate and gasket that mounted right up to the MAF sensor. Search eBay for "air intake adapter MAF ranger 4.0"… 1973 Ford Bronco - We'll have to figure out a solution for the fan shroud since the fan is almost completely outside it. I've read that a fan clutch from a 20… 1973 Ford Bronco - We used the Explorer's throttle cable but it angled upward into the hood too much so we cut the lower mounting ear off the bracket and cut… 1973 Ford Bronco - The oil filler ran into the intake tube and I just happened to have a Buick 3.8 sitting on the shop floor and its lower radiator hose was t… 1973 Ford Bronco - Another shot of the radiator hose attaching the filler tube. 1973 Ford Bronco - Nearly finished. We were going to keep the A/C lines for potential future use but we're going to yank them since they clutter things up. A… 1973 Ford Bronco - These 3 connectors were originally in the engine bay. The 4-pin square connector is used for the black/red wire to the reverse lights and a… 1973 Ford Bronco - Overdrive cancel switch and LED. There was a big hole here already so in it went. The LED has a faint glow even when not activated so a bul… 1973 Ford Bronco - This is the alternator charge light and it does need to be a bulb rather than a LED, preferably with a 470 ohm resistor in parallel in case… 1973 Ford Bronco - OBD2 port (AKA DLC) for diagnostics. It has 3 wires from C115 and then a power and ground wire. Laying on the floor are the check engine li… 1973 Ford Bronco - Eight lonely fuses, two relays, and a diode are all that's left. 1973 Ford Bronco - Since the Bronco doesn't have a true RUN/START circuit from the factory, we created one with a bridge rectifier and a relay. Two individual… 1973 Ford Bronco - The Explorer starter solenoid coil grounds through its case so we removed the paint from the wheel housing underneath it. Also grounded to… 1973 Ford Bronco - This still needs a little cleanup but it's just a busy area for wiring. C115 splits into 3 groups here: -The 7 factory circuits to the PDB… 1973 Ford Bronco - Arial view of the PDB. These wires now have split loom protecting them. To the right of the PDB you can see C123 which has the Yellow/White… 1973 Ford Bronco - We had cut a section out of the throttle bracket at the bottom and weld it back together to clock the bracket down so the cable didn't poin… 1973 Ford Bronco - The finished product! It turned out fairly clean but it sure would've made sense to paint the engine bay before we dropped the 5.0 in. Lear… 1973 Ford Bronco - We were adjusting the shift linkage when a cloud of stinky smoke came out from under the hood. We feared the worst since it looked to have… 1973 Ford Bronco - The test drive was awesome! This thing flies compared to when it had the 302 and C6. It even leaves rubber across peak torque in first gear…