Ford NP435

[jkirisits]

Who has one hooked to a 4cyl, like a 95 wrangler 4 cyl.
How did you adapt it to the 4 banger?

[currupt4130]

ive got it, call advance adapters and talk to mike partridge.

the conversion isnt that hard;

first off make sure its a ford version with the 6.68 first gear.

AA redrills their nv4500 plate with a few new holes and it pretty much sets up the way the nv4500 kit does. you bolt a new plate to your bellhousing and bolt that assembly to the tranny. the plate is an inch thick so you need a 1 inch longer input shaft, theyre rare to find so you usually have to buy one from a drivetrain supplier. (i ordered my tranny from a company called man trans that i found on ebay, they swapped in a new one for me for almost nothing, and accepted two ax-5 cores to drop some cost)

you have to get the adapter kit for the np231, it has a new mainshaft for the tranny with a 23 spline output and an adapter to bolt the tcase to the tranny. then you need to procure a 23 spline input gear, i got mine from a 95 dakota but be careful when trying to find the input gears. mines a 94, the 94 and 95 years intermingled gear cut b/w early and late styles if you can just grab the whole planetary setup along with the input gear you might save yourself some trouble getting the input gear cut right. also make sure you get the longer input gear so it seals up with the seal in the adapter.

be very careful when swapping in the new mainshaft for the transmission. on first gear there are two clips that sit in the first gear. they sit inside the hole, on splines, that the the mainshaft goes through. these clips are easy to break if you reinstall them wrong. they cut down on gear noise and help it stay in gear. if you pull the first gear cog off and drop the pins, pick it up and look at it from the side with the shift fork slot. from that side turn it so that the two flat spots are at the top, theyre machined into the back of the gear if i remember right. the clips go on the inside of the top left and bottom right of the gear. they hug the teeth, not the gear body itself, i made the mistake of hanging them towards the gear and broke them.

ive got the number for the clutch disc somewhere, if im right i believe it is a 9 inch disc, 10 splines, and 1 1/8 shaft, i looked it up in the books at advance auto parts (lots of cross referencing) and ordered a remanufactured disc. if you want the number for that disc just let me know and ill find it for you. i used my stock pressure plate and throw out bearing. the kit from AA comes with a new solid brass pilot bushing that is the right size for you fly wheel and the input shaft for the tranny.

it came out to be the exact same length as my old set up, my driveshaft bolted right in place like i hadnt done anything. the only thing i had to do was to cut out some of my skid plate because the gear box of the tranny is so deep. the tranny hangs down maybe 1/2 inch past the bottom of my stock skid. not a big deal b/c its cast iron and will survive lot of beating.

the 4wd linkage is kinda odd, i took my original shifter and kinda made something that is getting me by but im going to re vamp it. pretty much i chunked out a lot of the shifter, cut of the tab that bolts to the top of the ax-5, and re used part of that so that i now have the shifter bolted to the tcase bolts with two tabs. i can take pictures of whatever and help explain in better detail if you want, but its not that hard to figure out if you look at it for a few minutes.

i didnt have to bend my shifter around at all, i found a shifter at junkyard that was shaped so it came out of the top of the sifter column, and almost straight back, then went up and it clears my dash and center console great. the np435's have three different depths of shifter covers, so if you shop for a shifter you need to measure what depth yours is from the pins that hold the shifter handle in, to the slots on the shift rails, then match that up with the shifters your picking through.

for the reverse light switch, i went and got a stock ford one from advance auto. the yj reverse light switch harness is really close so i just took and ground the end of it down to get the right depth and clicked it into the stock ford reverse light switch.

if you need anything else let me know, thats all the problems and little annoyances i ran into so i hope it alleviates some of your trouble
-sam

ps: this is one of the best mods ive done yet, i now know i dont have to worry about my tranny breaking, it runs great for me on the interstate (4.10s, 4th gear, 2500rpm, 72mph), and has a great crawl ratio. 75:1 with the np231 in 4lo and first gear

[jkirisits]

sounds like this could be expensive.... what $ do you have in adapters and such (if you don't mind me asking)?

[currupt4130]

it wasnt tooo bad, that tcase adapter was like 500 bucks (with the mainshaft and tcase to tranny adapter), the bellhousing adapter was like 125, the clutch was 60 bucks, the tranny itself was a rebuilt and cost me like 600 bucks and it has a warranty. add in some 100 bucks for stupid costs and its a lot less than most good tranny swaps. this is a great swap, the tranny is still around, there are parts available for it, it has the second lowest gearing next to the sm420, its strong as crap, and totally worth the investment. i think i dropped 1200, and that was with the rebuilt tranny. you could easily get one for 150-200 bucks and shave off 400 bucks. call mike partridge at advance if you want pricing, thats pretty much the only stuff your gonna have to buy besides the tranny

[JTucker]

Sam,
I see you have your 435 in. I was wondering, I had'nt heard anything from you in a while. Glad to hear you like it.
Jesse

[currupt4130]

o hey jesse! yea man i love this tranny, its great, although i think i messed a bearing up in it running it w/o enough oil early on but ill deal with that later. im about to flat skid it and i still have to come up w/ a good design for a shifter and all. sorry i didnt get back to you after i was done with it all, but thanks for all the help with it, it really helped me out. ive got some cool ideas for a flat skid that ill send you pics of when i finish it. take it easy
-sam

[jkirisits]

thanks for the info... I appreciate it.
How is the tranny on the street? with the big jump in gears, I was wondering if it was streetable?
I wonder if I could save some money by installing a ford NP205 behind the NP435. With the deep first gear, I wonder what it would act like.

[currupt4130]

the tranny is decent on the street, not a nv3550 by any means. its not a speed shifter for sure, its very mechanical versus the fluid like shifting that some cars have now. the jump in gears isnt bad at all. i have 4.10s and 35s and it drives great for me on the highway and around town. second gear has a lot of power (its a compromise b/w 1st and 2nd on the ax5) and third gear is just a cruisng gear as well as 4th. it gets up a little slow for some peoples taste but im never in a hurry so i dont worry about it. there isnt enough gap that it strains the engine and it cruises along relativley well

[LeadFoot]

Yeah....I don't see why you would waste more time and money on a turd 231 if your gonna run a 435. I bought my rebuilt np435 for $200....including the 205. You could always run a 203/205 combo, or wait and save up some green when lowmax comes out with their 3.15 gears for driver drop 205s. Or both. :rockz:

[currupt4130]

well if you dont want to waste the money on a turd 231 waste it on a 300, what lo range does the 205 have?

[jkirisits]

-=- originally posted by currupt4130 -=-
well if you dont want to waste the money on a turd 231 waste it on a 300, what lo range does the 205 have?

if i remember correctly, the 205 has a low range of 1.97:1.
someone correct me iffen I am wrong.

[JTucker]

On the street, you just get used to runnin it up to 4 grand before shifting. Theres a big gap between 2nd and third, but you get used to it. I wouldnt really reccommend it if you drive a lot on the road or like a smooth shifting tranny, its an old truck tranny and shifts accordingly. The gears in it are also about three times the size of the stock ones.

[currupt4130]

i find myself going to about 3k before shifting, its not that bad for me but like jtucker said, its an old truck tranny so expect old truck shifting characteristics. you just have to be content with it when you drive it on the road

[jkirisits]

I don't really care what it drives like, as long as it is safe and strong.
This isn't my daily driver. I do however have to drive it back and forth to the trails. it sounds like a good option for me. since it is from a 2wd, i have to buy adapters to mount the 205 or 231. so it could get expensive.

[LeadFoot]

-=- originally posted by LeadFoot -=-
Yeah....I don't see why you would waste more time and money on a turd 231 if your gonna run a 435. I bought my rebuilt np435 for $200....including the 205. You could always run a 203/205 combo, or wait and save up some green when lowmax comes out with their 3.15 gears for driver drop 205s. Or both. :rockz:

Since you didn't see it the first time.

[JTucker]

I live in the hills so if I dont run it up pretty high it falls on its face. Thats with 4.88s and 35s. On flat ground its not bad.

[jkirisits]

-=- originally posted by LeadFoot -=-
Since you didn't see it the first time.


ya, i saw it. I am not going to put any money into the 231. I suppose I would be wise to not get a 2wd version, and hold out for the 4wd. that way when I do my v8 swap, I am set.

[currupt4130]

sounds like a damn good plan to me