i have a bronco 302 1990 and bought a f 150 with a 351, now the 351 swaped, i dont know if i should put the harness of the f 150 or work with the 302.. everything is the same but not the distributor. the 351 has the module seperate from distributor ,the wires are different...? can i us the 302 computer or...?

 

"Everything" is probably not "the same." With computer controlled drivetrains, your swap options can bre very limited
What model year was the F150 donor?
What trans is in the Bronco? What trans was in the F150? It makes a huge difference.

 

was in a 1992 4x4 with a automatic trani ,the bronco too.

 

Which automatic???
The 1992 351 could have a C6 or an E4OD
The 1990 302 could have an E4OD, an AOD or possibly a C6

The AOD will not live very long behind a 351

Unless they both happen to be E4ODs or C6s you're going to have issues

 

not shure . how can i know? if i stay with the 302 computer can i make it work if i change the distributer..?

 

You CAN NOT change the firing order by changing the distributor. The firing order is determined by the camshaft, the distributor merely matches it. Your injectors are batch-fire not sequential so the injector sequencing is irrelevant.

You have to figure out the transmission IDs. Take a look at these pix and figure it out: http://www.olderfseries.net/forum/vi...php?f=20&t=121

Your best bet would have been to swap the entire assembly engine, transmission, computer and harness from the F150 to the Bronco. That way there would have been no compatibility issues. You may still have to do this

 

bronco is a aod and the f 150 i think is a e40d. i still have the donor tran but its super long and didnt fit for the bronco drive shaft

 

Well here are the problems:
1) the 351 puts out more torque than the flimsy 2-piece input shaft of an AOD can tolerate
2) the fuel/spark/RPM curves of a 302 are very different from those of a 351 so the 302 computer is not going to work well with the new engine
3) you cannot use the 351's computer with the AOD; it will be looking for the E4OD

Your best bet is to swap the tranny, powertrain harness and computer from the F150 into the Bronco and modify the driveshafts.

 

Well, the E4OD computer can run in an AOD truck just like doin' a stick swap, you just have to ignore any codes it spits if you run a self test.

Adrianspeeder

 

The absence of the tranny sensors doesn't put it into some sort of a limp-home mode? That surprises me. Normally any missing inputs set a failure effects mode which has a negative impact upon performance.

Even if the 351's computer will work, that still doesn't solve the problem of the 351 having enough torque to turn the AOD's input shaft into a pretzel.

If he's going to use the 351 with an AOD, he's going to need to do some aftermarket upgrades to the tranny to make it live.

 

No, doesn't even set a check engine light, just stores all the E4OD codes. You are correct the AOD will have a shorter service life behind the 351 if he drives it stupid.

Adrianspeeder

 

ok thanks guys for the info...! so if i do some off road the aod will die...?

 

The input shaft is a 2 piece affair which allows torque converter lock up in either 3rd or 4th. It is a known weak spot in the AOD and one of the reasons that Ford never put the AOD behind either a 300 or a 351. The various aftermarket builders have high strength alloy shafts which are noticeably stronger and even offer 1 piece shafts which solve the problem completely but take away the lockup and therefore add more heat and therefore more problems and slightly reduce fuel economy.

If you use the AOD behind a 351 you will have to rebuild it sooner or later. (The same can be said for a pre-95 E4OD so there's no relative benefit there and the AOD is much cheaper than athe E4OD to rebuild.) When you do replace it, spend the extra $$$ for a performance build from a reputable source.