Wrong np435 please help .

[palerider]

So I purchased a np435 (Craigslist deal) looked for the 10 spline input shaft and square bolt pattern . After installed and bench pressing this dang Dana 20 into place and failing for half an hour I've realized the reason it won't go in . The output shaft is obviously larger diameter and after counting 33 splines ! Is there anything I can do to make this work ? And does anyone know what model this trans is ? I've already rebuilt and painted it . I also have cut the tunnel and purchased a gear banger so needless to say I would hope to be able to make it work .

 

[thegreatjustino]

Sounds like a 4x4 version. How long is the output shaft? Additionally, you want a 28 spline output, not 33.

 

[palerider]

It seems to about 6 in . It original had an intermediate housing on the shaft with a yoke bolted to the end

 

[NC-Fordguy]

So I purchased a np435 (Craigslist deal) looked for the 10 spline input shaft and square bolt pattern . After installed and bench pressing this dang Dana 20 into place and failing for half an hour I've realized the reason it won't go in . The output shaft is obviously larger diameter and after counting 33 splines ! Is there anything I can do to make this work ? And does anyone know what model this trans is ? I've already rebuilt and painted it . I also have cut the tunnel and purchased a gear banger so needless to say I would hope to be able to make it work .

Change the output shaft. Vendors that advertise on this sight have it available

 

[palerider]

Thanks Guys I was just looking at one just wasn't sure if that would do the trick. That's a huge load of my mind so thanks again for the help

 

[DirtDonk]

That sounds like either a 2wd version, or an early model mated to a divorced transfer case in a 4wd truck. Might be the same transmission for both, which would be why they used the divorced method.
I always thought that was a workable trans for swapping into an EB though. Apparently not...

Good luck.

Paul

 

[SavageBurro]

You can swap in a 28 spline shaft like this. https://www.tomsbroncoparts.com/product/main-shaft-np435-28-spline-new

Did you already also buy the adapter? Like this: https://www.tomsbroncoparts.com/product/np435-adapter-kit-125-refundable-core


Good info: http://classicbroncos.com/tranny-np435.shtml

 

[palerider]

Yes I already purchased the adapter plate from bc broncos as I happen to have the shorter 6 cylinder intermediate housing .

 

[Quick & Dirty]

Typically, 2 wheel drive and divorced 4wd had 28 spline output, and married 4wd had a 31 spline output, but there are variations to be aware of.

F100 4x4 with Dana 21 T-case had 28 spline 4wd.
1978-79 F350 2wd had a 32 spline output.
P, B, C, LN, F500-700 had a 35 spline output (with integral drum parking brake) and 1-3/8" 10 spline input.


Seems like you might have the 32 spline 2wd version. Hang on to the output shaft, housing and yoke. These are rare, and a good upgrade for a 2wd or divorced 4wd application.

http://www.pirate4x4.com/forum/ford/938298-np435-beef.html

 

[palerider]

Thanks for he info quick & dirty there is so much info on all these old ford parts. I have learned sooooo much since starting this project 3 years ago .

 

[Pa PITT]

palerider Don't give up on the NP435... YOU'LL Love it after you get it in..
.. I'm an old Farmer & These old trans .. as a kid we used to love to haul hay beside truck with these trans . in them . We could walk beside the truck in the field .. Truck just Idling along. NoOne in the seat. It's driving itself. your outside working & loading .. Low Speed 1st gear.
... I have this trans behind my Diesel .. I like it in low range 4 wheel drive on the trans fer case .. Then put the trans in 2nd & 3rd gears it's perfect for the pasture cruising .. Hunting .. back in 1st for the Rocks.. SWEET ..