I was talking with a salesperson from Advanced Adapters. He is hooking me up with the adapter plate for the AX5 bellhousing to mate it with a NP435. I was trying to figure out what input shaft I'll need for the 435 and what changes I'll need to make to my clutch so that everything will work properly.

I would greatly appreciate information from anyone that has done this swap or has information on it.
This will be in a '93 YJ with 2" of body lift (and lots of other stuff). Let me know if you need any other information to help me with an answer.

Thanks

Is this a new item AA sells? When i was looking into swapping out the AX5. teh NV4500 kit was the only avaiable option other than the s10 bell housing and a SM420.

If this is a new adapter please let us know!! Also what tcase are you planning on using?

This is not a full on adapter, it's just a small plate to change the bolt pattern. It's not currently in their catalog. I just got lucky when I called in and got their sales person who was aware that they were cutting them. It's really inexpensive as compared to other AA stuff. The adapter for NP435 to D20 runs around $400-500, where I only paid about $150 for the 2.5 to NP435 plate.

I'm going with a D20 from a pre '72 EB. I've found a place that sells rebuilt pre '72 D20's for $400 plus a $75 core charge (the used, non rebuilt units are $200). What do you think of those prices?

I believe the plate is similar to the one they sell for the NV4500, there will be some machining I have to have done to part of the transmission to have it work with my clutch and the salesperson said that they would be sending the NV4500 instructions so I would know what I needed to do.

I'd post the salesperson's name and extension, but he asked me not to broadcast EVERYTHING since the part's not in the catalog. If you're interested drop me an e.mail and I'll get you his information.

I saw your post on pirate about an AA adapter plate for the np435 to ax5. I called them and spoke to Vic about it. He gave me the part #, said it was a modified nv4500 adapter. He mentioned the only the np435 with a 7 and half inch input shaft would work. My question for you is what truck did you get the np435 from with the correct input shaft?

Thanks for the idea.

Call and get an input shaft for an NP435 behind a big block. There is only two inputs inputs available it's approx 7" inches long. I've lost all the info I had on my swap. But I will try to remember what I can. For the clutch I used the originally internal slave cylinder. I just cut and welded a plate to the input retainer. I don't remember how long I made it. If you do it this way you don't need change your clutch or clutch mechanism exept for the disk. I picked up a new clutch disk for an 84 4cyl mustang.

It's been working great for 3 years.

How does this combo of the 2.5 and np 435 work together. Does it shift really hard and do the gears match up with the power band of the motor? Anyone know the first gear ratio of the np435?

I believe the Np435 first ratio is 6.69 to 1. It is pretty much a three speed with a granny 1st. If it were just a trail jeep I would do it. Actually after seeing this I will be doing it. The tranny I have used seems to be pretty smooth. I put one behind a 4.0 it goes great. Real easy to work on and super strong. Also cheap to find.

It's a four cylinder it will never have the right power band. But with an inertia ring and the fact that the 2.5L is a solid engine it just chugs along real nice. Personnally I tap my rev limiter consistantly, Because; I secretely hope the engine will blow giveing me an excuse to bolt up a 5.0 that and it makes for a real nice show. First is not syncronized. If you rebuilding the tranny prior to install will make a big diffrence in how smooth it shifts.

Good Luck

NOVAK INDUSTRIES SELLS A KIT TO SWAP THE 435 BEHIND THE 4 BANGER, HOWEVER YOU ALSO HAVE TO BUY A DIFFERENT STARTER MADE BY A COMPANY CALLED MEAN GREEN. THE 1 TO 1 FOURTH GEAR RATIO WILL BE A BLESSING FOR YOUR 4CYL SINCE YOU PROBABLY NEVER USE FIFTH. I KNOW I DIDN'T. :shaking:

Because of the narrow powerband of the 4 popper, I think that a granny 4 speed isnt going to be doing you any favors. Better bet would be to upgrade the 5 speed with its narrow gear spacing, and run a doubler. Your already limited with the lack of cylinders, why limit it more?

Not downing the lil engine that could, I lived with mine for 13 years, never had a problem, but you have to build for a 4 cylinder, and not the granny gear only approach that you can get away with running an engine with twice the power.

By the time you wrap out first and hit second your already starting behind the 8 ball since the rpm drop is going to be HUGE and we all know the 4 banger doesnt like to lug, it needs revs.

I'm missing something I think. If you're bolting an NP435 up to a Jeep 2.5, why do you need an adapter? What pattern does the NP435 have? According to Novak's info, it's a standard Ford butterfly pattern (if coming out of a Ford).

http://www.novak-adapt.com/knowledge/np435.htm
http://www.novak-adapt.com/knowledge/ford_to_gm.htm

It seems to me one can modify a stock 2.8L S10 bell

http://www.jeeps-offroad.com/attachment.php?attachmentid=3257

What am I missing?

Greg

Greg your not missing anything. The 435 is the wide 4 bolt pattern. The ID on the 2.8 bell may need machined. what is the input length difference between the sm465 and the np 435. I know you can use the 2.8 bell for the 465 swap. The 2.8 bell is shallow so the 435 input may be too long.

I know the plate AA sells is just a redrilled and bored NV4500 plate that bolts between the ax5 bell and the 435. My bud has ran this for a couple years with zero issues. I wouldnt want the granny 4 spd with much street driving. As Kwrangln stated the jump in rpm's from 1-2 is huge. COmpared to the ax5 it would be like using 1st, 3rd, 4th all the time. Pretty much eliminating a hill climb gear on the trail.

Looks to me like the SM465 has a 6.5" input shaft length while the NP435 is listed as 6.62" (Novak says 6.5"). So, I don't see any reason why you can't just modify the S10 bell.

http://jeepgod.net/transizes.html

Greg

anybody have the depth measurement of the 2.8 bellhousing? i assume that since it is a short bellhousing it must be approx. 5.5" deep. seems the only way that the 6.5" input shaft would work.

am i right?

any input what clutch to use? pilot bearing?

I don't know about the S10 bell. My original bell + 3/4" adapter plate + 7.25" big block input shaft fit without any issues. As I remember it, I placed a level against the face of the bell housing and the input shaft stuck out beyound that point by 5/8".

I really wish I ddin't loose all my numbers I knew somebody would want it.

anybody have the depth measurement of the 2.8 bellhousing? i assume that since it is a short bellhousing it must be approx. 5.5" deep. seems the only way that the 6.5" input shaft would work.

am i right?

any input what clutch to use? pilot bearing?

Depth of the Chevy V6 bell is 6 3\8". It'll work...

Greg

Wiat, I just got off the phone with an AA rep and he had never heard of such a thing. I have a NP435 already adapted to get to an Atlas that I would love to run behind my new 2.5L YJ project. Is this possible with readily available parts?? I have a call into Vic, but if you guys know of a way it would save me getting a new Atlas to fit behind the AX-5.

Thanks for the help. :cool2:

I have run a 435 behind my 2.5 for close to three years now. When you call AA talk to Mike Partridge, he'll get you the parts you need. The input shaft you need is 10 in long, they came in the late 60s trucks. I bought a new one from http://www.drivetrain.com/ I was about 100 bucks I believe. The pressure plate and thowout are stock parts and the disc is from a mid 80s four cylinder mustang, turbo I think. Good luck.

I talked to Vic at AA last night, slovic on here, and got the total lowdown. Vic is THE MAN!!! This is the way that I will be going--just have to find a shaft.

Thanks for the help! :grinpimp:

I've talked to vic before, when I did mine he didnt know about the adapter either, but thats been a while. A lot of the sales people dont have a clue if a part # doesnt come up.

I am running the torque flight 904 behind mine with a 4.3 Atlas, and I love it. It runs down the road fine in town. Not a spped deamon on the road, but it works. It is awsome on the trail. I have 513 gears, but I wish I would have gone 589's instead.. But it crawls with the best of them.. No problems on the rocks, and have not had any problem with the mud when I had to get in it. I am also running 39.5 Iroks.. I may have to look into this setup your talking about though. Seems like it has a awsome 1st gear ratio.. I actually have to give mine gas to go when going down hill, so I am not sure if I would need to go any lower. Anyway.. Was just checkin out the post, and thought I would run what I did by ya.. Good luck..

Just a little follow-up info for those interested in this swap.

The 10.0625" model is PN WT291-16H and is $82.30 plus shipping. I would HIGHLY suggest that you have Drivetrain.com make sure that they are sending you the correct shaft. I received one that was had the wrong shaft in the box. The shaft should be 1 1/16" diameter with 10 splines for the clutch.

Now I can order this and my new atlas (http://www.pirate4x4.com/forum/showthread.php?t=388754) and get this thing rolling! Thanks for the info everyone. :smokin:

Dont forget the inertia ring Zach, trust me, its worth the money. Especially with the rpm drop you'll have between 1-2.

Dont forget the inertia ring Zach, trust me, its worth the money. Especially with the rpm drop you'll have between 1-2.

Already on order from Tri-county. Between that, the 435, and 5.0 Atlas I should have enough gearing and power to spin my 38s. I am debating on running my D44s that have 4.56 gears or a set of D60/hpD44 that Kostat has available, but they have 3.55s right now.

Go lower in the gears, since 1st is going to be essentially worthless in high range since its so low, second will need all the help it can get. Crawling only it'll be fine, but if you need some wheel speed get gears, min of 5.38's. Besides, if you do take it on the road, at 65 with the 4.56's you'll only be at 2600 or so rpm, which is lugging for the 4 banger, it likes 3K plus.

I will be running the D60/44 set for a while, but will regear to 5.something:1 when I redo them over the winter. This will be a trailer queen so the 120:1 low range will work for now(6.8X5.0 AtlasX3.54). The 59:1 ratio in 2nd gear low range should be decent for getting around the parks.

ahhh this topic again, im sorry i didnt get to chime in earlier. this is a fun topic for me.

ahhh this topic again, im sorry i didnt get to chime in earlier. this is a fun topic for me.

Did you do it the same way as the rest of us?

OK, I think I have ran into a problem. I have the new shaft and, when compared to the one that is in the 435 now, the new shaft is much larger and the bearing retainer will not slide over the new shaft. What have you guys done that have done this swap already? I am on the phone with drivetrain.com, but they do not seem to be aware of what is going on... :(

An update:
With major help from corrupt4130 and red90 I have found that I was sent the wrong shaft from drivetrain.com. They confirmed that the part number listed earlier in this thread should have a 1 1/16"X10 spline and the one in my box was too big. Of course, drivetrain.com is out of the shafts now so they are looking for the correct shaft...
The saga continues. :shaking:

What's the part# you need?

What's the part# you need?

Working with drivetrain.com part numbers, I need a WT291-16H. I am not sure if their part numbers are proprietary or if that number can be used with other companies. If you can locate one or point me in the right direction I would appreciate it.

Zach.


New update: I just spoke with Sean at Man-trans (http://www.mantrans.com) and they are 2-daying the correct shaft to me and we should be good to go. The whole problem is that drivetrain.com sent me the wrong shaft in the right box. For those doing this swap make sure you get a ~10.065" long shaft with a 1.0625" diameter and 10 splines. The part number that seems to be pretty universal between companies is WT291-16H.

anymore input for the clutch/pressure plate, etc.?

I think its in the post somewhere. Stock pressure plate, throwout, mid 80s turbo mustang disc.

Holy thread dredging, but I have a question as I finish up this swap...just one year later.:shaking:

OK, I have the AA parts machined as needed and have everything bolted up between the NP435 and 2.5 engine, but without clutch parts. I need to know exactly what clutch parts I need. I was just going to order a 1993 pressure plate and TO bearing and a "mid 80s turbo Mustang clutch disk", but when I called my buddy at Quadratec he said that I could use a clutch disc from a CJ that was 10"

My question for someone that has done this swap is what clutch disk do I really need? I thought the Mustang disk was only 9", but the stock YJ pressure plate is 10" so why can't we run a 10" disk if the splines are correct? Without checking before I bolted it in, does the input shaft use a 1 1/16"x10 spline clutch?

I also have a call into Mike Partridge, but thought you guys may be able to help before I hear from him.
Thanks, PBB tech gurus.:cool2:

I'ld say if it fits use it. I have the 9" from an 84 Mustang 4cyl. With stock jeep pressure plate. And zero problems.

I was just thrown off because I was going to order the pressure plate and TO bearing when he wondered why I didn't want a disk so I told him what I was doing. He said that some CJs had a 10" disk with the 1 1/6"x10 spline hub. I just realized what the problem is--I need a 9" disk where he was thinking that I could use a 10".

Nevermind, I am just loosing it.:rolleyes:

Thanks for the help.:grinpimp:

5 years later and many trails under the belt with this setup and...I am selling it.
http://pirate4x4.com/forum/showthread.php?t=1009366

It has been a great setup and has never let me down. I am just going a different way with a new buggy I am looking to build. I can say that if you are building a 2.5L Jeep that an NP435 with a 5.0 Atlas and 5.13 gears it will be able to go ANYWHERE with 40" tires!

Thanks to everyone that helped in this thread and Vic at Advance Adapters!