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I have a 1981 f100 I want to convert to 4x4 it has a good running 300 straight 6 and a piece of crap srod-rug transmission also the 9 inch has a ton of slop in it so I found a 1987 f150 with 4 speed np435/t18/19 not sure I can get delivered for $600 I wanna know will everything bolt up front ttb axle setup and rear 8.8 i believe not sure about rear end and has 300 6 if I am right only thing I will need will be bellhousing for mechanical clutch since it's hydraulic clutch and I got new rims on 5x5.5 lug so I wanna keep them if lug pattern is the same is this a good deal or is there a better year truck I need to look for a more complete swap
I have not done this swap but from what I have seen posted it should just bolt in.
If your truck and the $600 truck are both LB or SB then the rear drive shaft should also work other wise you would need to deal with that.
As you said you will need a mechanical clutch bell housing OR swap in the hydraulic clutch setup from that truck. I hear you have to do pedals and all if you go hydraulic clutch.
As much as I don't like hydraulic clutch I think that would be the way I would go as I would have the full truck for all the needed parts. I would also look into adding the fire wall reinforcement panel at that time also.
I know it's a $600 truck but can you drive it to see what shape the drive train is in? you don't want to put in the 8.8 or transfer case or front axle and then find they are bad and have to pull them back out.
Then again it is $600 LOL
Dave ----
ps: does that $600 truck have V belts or serp belt and AC? I am looking for V belt AC compressor brackets.
Truck is in horrible cosmetic shape and I don't know if it would run but 4 speed trans is bullet proof even if I had to get transmission rebuilt and axles rebuilt for $600 it's worth the axles for cores and front end parts plus driveshafts my main concern is 87 is change over year would everything work with my 81
I also want to do a conversion on my 86. The research i have done says that 1980 through 1996 f150 4x4 components are all interchangeable. I wouldn't completely take my word for it, and do your research. i do think odds are good that you will be just fine though. Just my 2 cents
I have a 1981 f100 I want to convert to 4x4 it has a good running 300 straight 6 and a piece of crap srod-rug transmission also the 9 inch has a ton of slop in it so I found a 1987 f150 with 4 speed np435/t18/19 not sure I can get delivered for $600 I wanna know will everything bolt up front ttb axle setup and rear 8.8 i believe not sure about rear end and has 300 6 if I am right only thing I will need will be bellhousing for mechanical clutch since it's hydraulic clutch and I got new rims on 5x5.5 lug so I wanna keep them if lug pattern is the same is this a good deal or is there a better year truck I need to look for a more complete swap
All f150's were 5 on 5.5 bolt pattern till 96.
If the donor is a f150 it will not have a t19 originally.
Everything will bolt in except the rear leaf springs. The 4x4 trucks had 3 inch wide rear springs, the 2wd trucks had 2.5 inch wide leaf springs. The 2.5 inch 2wd springs will work just fine for the conversion, so if you keep them you can just bolt the 4x4 rearend in place. If you decide you want to run the 3 inch wide springs, you will need to drill out the spring hanger rivets on the 4x4 frame and swap them over to the 2wd frame so you can use the 3 inch wide springs.
Just remember later on when you do brake jobs and such, you will have to tell them to look up a 87 f150.
Mine was an 85 f150 300/srod to np435+bw1345. The old crossmember wont work as is. I had to I think flip mine and drill a hole wider for some reason(red line below). Trans will also run into the floor big time so I bolted the crossmember under the frame and.... skipped the two supports. All was fine for about 2 yrs until a nut randomly came loose and the whole thing half fell out. Limped it around the block home, shifter jammed against the floor in 3rd and got it all bolted back up into place thanks to buddy rushing over with a floor jack. I now have two grade 5+ bolts per side, with washers and tack welds to hold the nuts from coming loose.
I recently got the drivetrain from an 80-86 pickup with a 4x4 np435 including the crossmember. It is a 2 piece and I somehow lost or wasn't given the mount for it so I don't know what mount it needs....
So you have two choices for crossmembers: 1. Keep the old one, maybe open a hole a bit, maybe flip it, then bolt it to the bottom of the frame 2. Get the right one if you can and be sure to get it all.
first two pictures are the np435 4x4 one, the rest is my 2wd srod one made to fit the np435
Since he is buying a donor, he should have all the proper crossmembers and also the proper wiring/plug-ins for the reverse switch and such. I do not recommend running the lower crossmember without the short upper ones also. Even if you have to drill new holes for the upper ones, I would try to get them back in. They keep the frame from twisting, keeping it straight up and down, most of the crossmembers down through the frame have them.
When I was doing my c6 to zf swap, I had the donor also and had the proper crossmembers. In my case the lower crossmembers were the same, but the upper ones had different offset, since the zf set back a inch more than the c6. I was looking at it, and re-drilling the frame at the top would have been difficult if I tried to use the old upper brace pieces, but I think what I would have done is bolt the upper pieces to the lower crossmember in it's new location, and then mark at least one of the factory frame hole locations on the upper brackets, and at least use them with one upper bolt.
Did you end up doing the conversion? I've got a 81 f-100 with a 94 4x4 donor, Im just trying to know it fits before i tear it apart.
The front end will bolt in and fit. What engine and transmission does your f100 have now? What engine and transmission does the 94 have now? The last two are where you might run into trouble.
well i bought a 81 f-150 to do the conversion to now. its got a 300 I6 and i think the 94 had a 302 but im not sure because that engine blew and i took it out years ago.
Did you end up doing the conversion? I've got a 81 f-100 with a 94 4x4 donor, I'm just trying to know it fits before i tear it apart.
How are you planning to do it? Swap the 1994 4x4 parts under the 1981 frame, or do you want to swap the 1981 body on to the 1994 frame and chassis?
I just did a similar swap. I bought a 1980 F150 with a bad frame, and swapped the body on to a 1995 F150 frame/chassis. It was a lot of work, but I had the time (and patience) to do it.
If you're just swapping the 1994 4x4 running gear on to the 1981 frame, then everything should be plug and play except the transmission crossmember...the bolt holes in the frame might be in different locations. Easy to fix for the crossmember, but more difficult for the angled brackets that attach to the top of the frame rails. You'll have to swap out the rear leaf front hangers, which involves drilling the rivets out of the frame.
well i bought a 81 f-150 to do the conversion to now. its got a 300 I6 and i think the 94 had a 302 but im not sure because that engine blew and i took it out years ago.
I think the only choices for a 94 f150 would have been a 300 six, 302 or 351w. In any of those cases the trans should bolt up to the six. Make sure you get the correct flexplate or flywheel.
The 94 is in bad condition, but the 4x4 aspect was mostly replaced before it was rolled. I was going to try to swap the 4x4 parts on to the 81 f-150 frame. Would the 94 have electric posatrack? for the trans i was planning to try and swap the tail housing because the 94 has a computer controlled trans.
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(sigh) It's difficult to read the OP's posts, since they lack punctuation of any kind.
