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Old 07-21-2012, 12:29 AM   #1
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Ford 302

So I have decided for multiple reasons I want to put a Ford 302 into my YJ. I have a few questions though before fully committing to this. Are there any problems people run into using an adapter plate to mate V8's to the AX15. How long will an AX15 last behind a V8 if I offroad and beat on it once in a while? Is the adapter the same for the AX15 and NV3550? I ask because if I kill my AX15 I am wondering if I would need a different adapter plate to upgrade to a NV3550. Should I expect any problems from the NP231? I understand that is supposed to be an extremely strong TC. How well does the Dana 30 front withstand a V8? I also assume I would need to upgrade my fuel pump. I know about the other common things like wiring, gauges, etc... Anyone who can answer as much of this as possible would be really appreciated.

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Old 07-21-2012, 12:43 AM   #2
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The AX15 will handle the torque of the V8, but you might have a tough time finding a proper adapter plate to mate them together. If you put any kind of spacer plate in between the motor and trans the input shaft on the trans isnt going to be long enough to reach the pilot shaft bushing.

You might be further ahead to go with a ford 5spd and mate it to your NP231. Most problem you would have there is changing the input gear on the t-case to mate with the output shaft of the ford trans.

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Old 07-21-2012, 09:17 AM   #3
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I am going to use the ford engine, trans, and tc and then just get driveshafts adjusted to fit.

Now that I am finally going back to first shift, I can finally start working on doing this
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Old 07-21-2012, 10:51 AM   #4
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What is wrong with the adapter plates advance adapters and Novac make? Neither of them actually fit properly?
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Old 07-21-2012, 11:33 AM   #5
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Those adapters mate the AX15 with a ford bell housing. So then you need a ford flywheel and clutch system. The next problem you would have with that mating is getting a clutch master cylinder with the same bore as a ford slave cylinder, or getting a ford master cylinder to mate with your clutch pedal and clearance issues behind the brake booster.

I would say for cost effectiveness, and ease of the swap, i would go with the ford trans, and even a NP205 behind it then the only mating issue you would have is the driveshafts. Much simpler. Just my 2 cents.
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Old 07-21-2012, 11:41 AM   #6
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Also, what 5 speed transmission can bolt to the np231? I have no problem swapping input shafts, but I dont know what I would get a standard transmission out of that would have the bolt pattern in the back for an NP231 or any transfer case. Also, how are the gear ratios in those compared to the AX15?
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Old 07-21-2012, 12:25 PM   #7
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I had a 93 F-150 with a 5spd in it. I dont know the actual numbers on it for gear ratios, but i would say they are lower than the AX15. Reason why is cause the F-150 had 4.10 gears, and the 93 wrangler that i had ran 4.56's, with an AX15.

Both were sitting on 35" tires, and i could start out in 2nd gear with the pickup where i had to use 1st with the wrangler.

I believe the Ford had a NP205 for a t-case, but it still has a drivers side drop for the front driveshaft, which would work for the wrangler front end.
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Old 02-19-2014, 01:20 PM   #8
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just got off the phone with Novak. I will be using their stuff for my conversion. I plan to do a complete write up with pictures and video and will post it here. email me for any questions. I have done all the research and can now answer a ton of questions.
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Old 02-19-2014, 01:30 PM   #9
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Quote:
Originally Posted by teddynaegele View Post
just got off the phone with Novak. I will be using their stuff for my conversion. I plan to do a complete write up with pictures and video and will post it here. email me for any questions. I have done all the research and can now answer a ton of questions.
You can get a np435 for dirt cheap. It is stronger than an ax15 and very short making driveline angles better. 6:1 ratio on first gear. Ax15 will only hold up for so long if you build the 302 and run large tires.

To me it doesn't make sense to pay more for an adapter from Novak than it does to buy a transmission that is stronger and made for the 302.
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Old 02-19-2014, 01:33 PM   #10
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i have been thinking about this also. if you haven't seen it, here is the novak write up that shows exactly which motor/trans/tc combos you can use and which adapters and mounts they have to mate everything

Installing Ford V8 Engines into the Jeep YJ Wrangler

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