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post #31 of 441 Old 08-05-2010, 06:14 PM
PlatinumNiner
Web Wheeler
1998 ZJ 
 
Join Date: Oct 2009
Location: Long Island NY
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What tranny are you using?

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post #32 of 441 Old 08-05-2010, 06:15 PM
MoparFreak69
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1990 YJ Wrangler 
 
Join Date: Mar 2010
Location: Boise
Posts: 1,279
There are 2 options for number of teeth for the ring gear on a 5.9 I believe. The most common is the 154 which is what was on the Dakota 3.9 donor and the 5.2 flywheel (tone ring donor) I picked up and put in my JY, which was also what came out of the Dakota donor. The 3.9 starter is the same part as its 5.2 counterpart so no need to worry about it not being up to the task. The smaller starters are quite nice and tuck out of the way to avoid exhaust routing issues.

90 YJ 5.2 Magnum, AX-15, 231 SYE'd
D44 front, welded/trussed AMC20HD rear. 4.56 gears soonish.
Western 6 lug aluminum wheels, with 35x12.50x15 Wrangler MTRs
MYj Build
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post #33 of 441 Old 08-06-2010, 07:51 AM Thread Starter
bmgadg
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1992 YJ Wrangler 
 
Join Date: Mar 2008
Location: Mississippi
Posts: 463
Quote:
Originally Posted by PlatinumNiner View Post
What tranny are you using?
The big bad ax-15, I know it's not the best choice but I have one with a dakota bellhousing so I'm using it till it blows up then I'll upgrade to a nv4500.

Quote:
Originally Posted by MoparFreak69 View Post
There are 2 options for number of teeth for the ring gear on a 5.9 I believe. The most common is the 154 which is what was on the Dakota 3.9 donor and the 5.2 flywheel (tone ring donor) I picked up and put in my JY, which was also what came out of the Dakota donor. The 3.9 starter is the same part as its 5.2 counterpart so no need to worry about it not being up to the task. The smaller starters are quite nice and tuck out of the way to avoid exhaust routing issues.
Thanks man, I'll pick up a 3.9 starter today. I looked at both the 5.9 and 3.9 starters and they look very similar, just different part numbers. My main concern was the tooth pattern.
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post #34 of 441 Old 08-06-2010, 09:12 AM Thread Starter
bmgadg
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1992 YJ Wrangler 
 
Join Date: Mar 2008
Location: Mississippi
Posts: 463
Ordered a reman starter from advance, they sent me an email special so I got it slightly discounted. Part number is 17466, hopefully it works!
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post #35 of 441 Old 08-07-2010, 08:38 PM
PlatinumNiner
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1998 ZJ 
 
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Location: Long Island NY
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The AX-15 is a great tranny. It should hold up nice for you. What axles do you plan to run? This thing is going to be an animal!
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post #36 of 441 Old 08-09-2010, 10:20 AM Thread Starter
bmgadg
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1992 YJ Wrangler 
 
Join Date: Mar 2008
Location: Mississippi
Posts: 463
Quote:
Originally Posted by PlatinumNiner View Post
The AX-15 is a great tranny. It should hold up nice for you. What axles do you plan to run? This thing is going to be an animal!
Dana 44 front from a 76 f150 and an 8.8 from a late 80's f150.

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post #37 of 441 Old 08-09-2010, 04:59 PM
PlatinumNiner
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1998 ZJ 
 
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Location: Long Island NY
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Nice. Going to be a sweet wheeler/driver. Tires?

Fuel rail is on its way
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post #38 of 441 Old 08-09-2010, 05:45 PM Thread Starter
bmgadg
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1992 YJ Wrangler 
 
Join Date: Mar 2008
Location: Mississippi
Posts: 463
Awesome! I'm waiting for this heat wave to end before I work on it anymore. It's really too hot to do anything outdoors.

I have 34" swampers on it now, but I'm looking to trade for some 36" ones. It's going to be mixed use trail/driver.

Last edited by bmgadg; 08-09-2010 at 06:13 PM.
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post #39 of 441 Old 08-09-2010, 05:56 PM
Area.3.Fiftyone
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1996 ZJ 
 
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Location: Kingston, Pa. 18704
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I have a question regarding such a swap:

I am going to do the same thing in one of my rigs, but my donor rig is a 96 ZJ (OBDII).

I know it's better to use OBDI for the harness and computer, but is there anything different as far as the motor goes?

Also, would it be better to grab the wiring harness out of ZJ or another YJ and splice in the extra wires?

I'm leaning towards grabbing a ZJ harness and isolating engine management out of it. Any thoughts?

79' CJ7 - 82' CJ8 - 94' YJ - 96' ZJ
Diagonally parked in a parallel universe.......
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post #40 of 441 Old 08-09-2010, 06:07 PM
PlatinumNiner
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1998 ZJ 
 
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Get a ZJ harness easiest way to go
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post #41 of 441 Old 08-09-2010, 06:12 PM Thread Starter
bmgadg
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1992 YJ Wrangler 
 
Join Date: Mar 2008
Location: Mississippi
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Quote:
Originally Posted by IronMaiden View Post
I have a question regarding such a swap:

I am going to do the same thing in one of my rigs, but my donor rig is a 96 ZJ (OBDII).

I know it's better to use OBDI for the harness and computer, but is there anything different as far as the motor goes?

Also, would it be better to grab the wiring harness out of ZJ or another YJ and splice in the extra wires?

I'm leaning towards grabbing a ZJ harness and isolating engine management out of it. Any thoughts?
I don't know if there's any benefit to running obdII other than the advanced diagnostics. I'm running obdI to get the benefit of flexibility in the tolerances, I've heard it's much more forgiving. I got the whole harness out of a Dakota and a computer from a 5sp Ram. I plan to splice in the new harness and discard the old jeep one. At least that's what I hope will happen!

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post #42 of 441 Old 08-09-2010, 08:07 PM
Area.3.Fiftyone
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Quote:
Originally Posted by PlatinumNiner View Post
Get a ZJ harness easiest way to go
I'd like to just re-use the ZJ harness out of the 96 that the motor and trans are coming out of.

How much work is it to isolate the engine management and wire up the computer as a stand alone unit?

79' CJ7 - 82' CJ8 - 94' YJ - 96' ZJ
Diagonally parked in a parallel universe.......
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post #43 of 441 Old 08-09-2010, 08:57 PM
MoparFreak69
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1990 YJ Wrangler 
 
Join Date: Mar 2010
Location: Boise
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Its easy to wire the PCM as a standalone, using the stock YJ wiring. If you check out my build thread I did just that using an OBDII system. I didnt wire up the OBD port yet so I dont know what sensor I am trying to chase down as being faulty, but it would probably be easier to wire it up and just throw a scan tool on but it runs good and gets about 20 MPG so I will live with the hiccups when the throttle is stabbed for now.
The only changes between the early OBDII systems and the OBDI systems is the addition of an after cat O2 sensor for emissions testing purposes, and the diagnostic port (which some OBDI systems actually had). All of the sensors perform the same functions, only change I know of is wire colors and the connectors on the O2 sensor changed. Everything else works for both systems as far as i'm aware.

90 YJ 5.2 Magnum, AX-15, 231 SYE'd
D44 front, welded/trussed AMC20HD rear. 4.56 gears soonish.
Western 6 lug aluminum wheels, with 35x12.50x15 Wrangler MTRs
MYj Build
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post #44 of 441 Old 08-10-2010, 07:06 PM Thread Starter
bmgadg
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1992 YJ Wrangler 
 
Join Date: Mar 2008
Location: Mississippi
Posts: 463
Well I've bought almost every part I need now except for the engine rebuild kit, gotta wait till friday when I get paid! Got motive 4.56 gears and master install kits for the axles, block is out of the machine shop, heads and all other misc parts are cleaned and painted, and all the parts needed to mate the ax-15 to it

Only other thing I lack is the dust shield for the bottom of the trans bellhousing. The junkyard I got the housing from didn't have the shield anymore, and it's proving to be impossible to find one. I did pick up one from a 3.9 automatic ram, and I assumed it would be the same as the 5 sp... Wrong!!

Should I go to the stealership and buy one or just fab one myself? Doesn't look to be anything more than a cutout from thin gauge steel...

If you have one or know someone that does let me know, I'd rather use oem parts if possible.
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post #45 of 441 Old 08-12-2010, 10:07 AM Thread Starter
bmgadg
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1992 YJ Wrangler 
 
Join Date: Mar 2008
Location: Mississippi
Posts: 463
I tapped the pilot bushing into the crank, fit like a glove!



Also got a new flywheel in yesterday. The holes for the pressure plate are about an inch farther out, which I expected. My question is, do I have to run the jeep clutch set or can I use a dodge 5.9 set? Both have 10 splines, 1-1/8" spline inside diameter, and the release bearing is the same part number.... so couldn't I just bolt on the 5.9 set and avoid drilling new holes in the flywheel? Seems like there wouldn't be any reason not to, unless it won't fit properly inside the bellhousing?

Last edited by bmgadg; 08-12-2010 at 10:10 AM. Reason: spelling
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