Help with trans swap - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 10-22-2001, 08:52 AM Thread Starter
 
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Help with trans swap

I've been posting here for some time now, I've never really had a jeep running on the street, and all of this is pretty new to me. I use to own a 81' z28, so I now own a 88 wrangler and need to do a little more work on it before I put it on the road.
I'm afraid to post pictures since the owner before me felt like putting 30's on it with now lift, and they look really close to the fenders.
I am looking to swap out the transmission in it since I believe it's the BA/10. I was just curious to see if I put in the AX-15, it seemed to match up with the NP231, I was just wondering if that would be strong enough to put in a 360 in a year or so?
Sorry I ask a few questions without a lot of input, but I'm still learning a lot of this.


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post #2 of (permalink) Old 10-22-2001, 11:03 AM
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Re: Help with trans swap

that ax15 wont last behind a v8...

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post #3 of (permalink) Old 10-22-2001, 12:38 PM Thread Starter
 
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Re: Help with trans swap

good thing I figured that out now, thanks.

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post #4 of (permalink) Old 10-22-2001, 05:43 PM
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Re: Help with trans swap

i say throw in a granny np435 out of an older ford, it will handle any v8 you put in front of it and the best thing about it is it will bolt up to a 5L out of a mustang, also it has a 6.69:1 first gear for a nice crawl ratio. if you are running a t 176 tranny it will bolt right up your stock bellhousing without any modifications

93 sahara, SOA w/ 2.5" ranchos, np435, twin stick dana20, 9" and d44 w/ detroits
post #5 of (permalink) Old 10-23-2001, 12:06 AM
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Re: Help with trans swap

Hey where do I get more info. on the NP435 swap, you say it uses the T-176 bellhousing but what about bearing retainer and input shaft sizes etc. How well does it bolt up to a dana 300? I am looking for a trans that will work with my 258/6 but eventually work with an AMC or Ford V8...

-Jon

1985 CJ7, 258 6, 77k, T-176 4spd, Dana 300, 1" body lift, 31's
post #6 of (permalink) Old 10-23-2001, 12:24 AM
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Re: Help with trans swap

Jon check out Novak's website. They have the answers to every questin you asked. http://www.novak-adapt.com

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post #7 of (permalink) Old 10-23-2001, 01:15 AM
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Re: Help with trans swap

Anyone know why the AA book says the AX-15 is a good tranny that will hold up to V8s?

post #8 of (permalink) Old 10-23-2001, 02:05 AM
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Re: Help with trans swap

Here is the combo I used in my '88 YJ. T-150/176 bell housing and plate, Ford NP435, flywheel and starter from a CJ (around 85. CJ flywheels are approx .3" thicker than the YJ flywheels) iron duke (pontiac 151) clutch slave and master cylinder, Advance Adaptors short 23 spline NP435 to NP231 adaptor and pilot bushing, switched transfer case to 23 spline short input gear, 10.4" clutch disc (CJ with a T-18), 88 YJ pressure plate, The release bearing was from (if I remember correctly) the CJ with a T-18. The skid plate will have to be cut to clear the transmission, new holes drilled for the trans mounts (I reused the YJ trans mount), and the transfercase shifter bracket will have to be modifyed. It is not hard to do, but it does involve mixing and matching some parts. If you are interested in doing this and need any help, drop me an e-mail. AA tech support was not any real help. It almost sounded like they had not actually put an NP435 into a YJ. If I had it to do over again, I would still swap an NP435 in. The amount of control you gain with the lower first gear is unbelievable.

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post #9 of (permalink) Old 10-23-2001, 10:38 AM Thread Starter
 
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Re: Help with trans swap

These are some really great ideas. But since I am rather limited to my amount of experience with transmission swaps, how hard would it be to put in the T-18 with the given mods you said (T150 bell housing/NP435 adapter, and NP245 xfer case)? So I guess what I'm saying is, how hard is this(actualy doing and finding parts) ? in a ball park how much does it cost to assemble all that stuff?
I wanted to try and keep the 4.2L I had in there since I really can't afford to replace it, and the emissions here in RI won't allow me to anyway.
thanks in advance, I think i'm getting a much better idea on this.



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post #10 of (permalink) Old 10-23-2001, 11:25 AM
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Re: Help with trans swap

You asked how much it costs. I was just considering swapping an NP435 that I already have into my 80 CJ7 w/ 258 and TF727. I would have needed a bell housing (I have an SR-4 bell housing but that wouldn't fit) to the tune of $402.97 and an adaptor to the Dana 300 to the tune of $505.42. Not to mention the clutch linkage, mounts, etc. I chose not to go thru with it. Was cheaper to rebuild my automatic for $369. If you do go thru with it, consider a hydraulic clutch. Much cleaner and easier installation wise.

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