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2wd-to-4wd conversion

 
Old 02-04-2019, 09:17 AM
  #101  
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Originally Posted by frank5079 View Post
First off, you are asking a question from a thread that is almost 9 years old.
Doesn't mean that I can't answer the question. The information is still the same, whether its brand new or 9 years old.
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Old 02-04-2019, 09:23 AM
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Originally Posted by Vincent Rovedatti View Post
What would you suggest as far as parts that you can bolt in for a 2wd to a 4wd conversion to a 84 Ford F-150 with an i6 engine and 3 speed + granny gear transmission? I need more details as far as what front end I need, what transfer case I need and what rear driveshaft I need? Thanks!
You need the whole front end out of a 4x4 truck, 1980-1996. Beams, axles, radius arms, etc. If you can snag them, i'd get the coils too. Its easier to leave the coils attached than it is to pull them off the axles (unless you are doing a lift at the same time).

You'll also need a 4x4 transmission, transmission crossmember, and transfer case. I'd try to get one that matches your transmission. NP435 with a SBF bellhousing pattern (300, 302, or 351w). With the 4x4 transmission, you can put in whatever transfercase you want behind it. the BW1356 is going to be stronger than the NP208 for the chain drive cases. The NP205 will be even stronger than that, but the low range won't be quite as low. I'd probably just use whatever transfercase is attached to the NP435 that you pick up. That will ensure all the shifter linkage is the right length and all. Grab the front driveshaft from that same truck as well. The rear driveshaft will all depend on what cab/bed configuration your truck is. If you get lucky, and the donor truck is the same as yours, grab the rear driveshaft too. Otherwise, just find a driveline shop, and they can make you a new one.

But, outside of that, you can honestly use whatever transmission/transfercase combination you want. These trucks are all fairly universal with parts swapping from 1980-1996. There are some oddball parts, here and there, but with a little extra work, you can swap in whatever you want.


Having said all that.... If I were to start over and do it all again (which I actually did), I would do a straight axle swap at the same time. Its not much more work, you can damn near piece together a bolt in kit with the right parts selection, and it'll be a good upgrade.
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