4BT 71 Bronco

[Dieselnutz]

I just got home from the 700 mile round trip to pick up the breadvan. I am excited but tired. Got a lot of questions for the guys that have done the swap. Drove it around the block a few times and it seems good. It has some good parts(Dana 60, T19) but no Hydroboost. I have alot of parts just got to figure out what combo I want to run. What front springs should I run?

 

[Rotty]

congradulations on the bread van.

Are you asking what spring on the bronco?

 

[DogDiesel]

4BT Bronco

I have 3. 5 - 5. 5 lift springs with my 4. BT; mainly to clear the oil pan. The extra weight compressed them down to a little over 2". I have a 2" body lift. However, I believe I will find a set of 2. 0-2. 5" and install them.

Problem: Squirrelly steering above 65MPH.

I have 7 degree axle shims, and every steering part is new; top of the line parts.

I have the square oil pan; I will find a rear sump oil pan, customize it, and lower my suspension to normal as described above.

I use my 4BT Bronco 95% on road and intend it to be a daily driver. Just installed a 23 gal tank, plus the 11. 5 aux, for 700-850 cruising range.



As for brakes, I have vacuum booster and drums. With the accessory driven vacuum pump, I have excellent brakes. When I installed the neopreme thrust bushings, my stops are almost 100% straight true.



I am running the THM-475 with 3:50 gears -- 35" tires with overall axle ratio of 2:78: 1 . With a 28% speedo reducer and 17 tooth, I am 10 miles for 10 miles.

Mine has no power deficiencies; I feather the throttle to stay with traffic.



Still sorting out turbo. Currently running non-wastegated, and appreciate low end lag and smoke cloud on heavy throttle, which clears at about 1100 RPM. Have a HX-30 form 4. 5BTA to install.



Had vibration from HELL, till I went back with the P30 oil filled mounts, notched frame at starter and put rubber washers under transfer crossmember mounts.



Again, the power is awesome.



Wayne

 

[Dieselnutz]

I have 3. 5" James Duff springs on the front of the bronco but I think they will be too soft. I was kind of thinking about a set of 4" off a big bronco. I also have a 3" body lift. I will run a NP435/205 combo and 35's or 37's. Trying to make up my mind for the 3. 50's or 4. 11's.



The motor mounts look weak. I may go to the 1st gen type or the p30 ones.

 

[DVolk]

Id get a hold of Cage off road in St. Helens Ore they build lift kits for dodge so they know cummins weights and specialize in ford stuff



they advertise in most 4x4 magazines