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Old 03-12-2009, 05:45 PM   #1
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Time for my YJ build!

Well it all started when my girlfriend, now wife bought me a YJ last year. It was a much abused 89 4.2 5 speed soft top that barely made it home. After weeks of tinkering and mostly undoing all the crap that some PO's did it has turned into a reliable (yes reliable, contrary to popular belief!) fun machine. I did find that the frame was bent and that my love for the 4.2 with 160K miles on it is not very great.

Looking to the future we are planning to retire to Mexico next year and have decided that the YJ would be going with us. With that in mind some renovation was in order, one was drivetrain. I bought and stripped a 96 Blazer of it's 4.3, it's NV3500 five speed and 231C transfer case, that will solve my love/hate relationship with the 4.2 as I am a longtime Chevy man and will get rid of the ever beloved French transmission... I thought about getting the frame straightened but decided to just go with another frame once one came up at the right price. It's home and work has begun. The frame is going to be stripped and repaired/strengthened where needed and painted then the drivetrain will go in with some new axles stolen from my 95 YJ and then the tub swap will happen. So here it starts, I'll update as I go..
Lance
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Old 03-12-2009, 06:09 PM   #2
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Nice. Remember take notes as you go and post lots of pics. Sounds like a fun build.

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Old 03-12-2009, 07:09 PM   #3
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Sweet Some Bonding time,^^^^^^^^^^^^XXX2
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Old 03-12-2009, 07:10 PM   #4
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btw if you ever need some adapters these guys have it for many different conversions Novak Jeep Conversions - Home
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Old 03-12-2009, 09:18 PM   #5
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lookin good lance.
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Old 03-12-2009, 09:41 PM   #6
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Man i wish my back was better i would love to start a project like that. looks like fun!

good luck with it.

Sean
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Old 03-13-2009, 05:16 AM   #7
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Quote:
Originally Posted by YjMopower View Post
btw if you ever need some adapters these guys have it for many different conversions Novak Jeep Conversions - Home
Thanks for the link, I shouldn't be needing anything though, I'm going with all chevy drivetrain and will make a frankenstine transfer case (chevy front case and input, jeep outputs) and will be fabbing up my own engine mounts. Wife is leaving today on a business trip and I've got orders to keep busy and work on the Jeep It don't get any better than this
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Old 03-13-2009, 07:08 AM   #8
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remember to keep the NP231C guts. they're bigger and stronger.
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Old 03-13-2009, 11:12 AM   #9
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Oh okay iam cant wait to see some progress, neither can i wait to do my swap.
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Old 03-13-2009, 07:53 PM   #10
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Friday fun!! well sort of, amazing what you can do by yourself, wish there was a beer drinking Jeeper close by at times with nothing to do I could use the help

I wasn't looking forward to laying under the frame cutting rust and then painting etc! So thinking about it at work I came up with this, not that it's anything new but I wasn't planning to go this route originally. Wow, well worth the $35 for the second cheap engine stand from Harbor Freight or the time pulling off everything that was going to come off anyway!

Can you say rotisserie???
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Old 03-13-2009, 07:59 PM   #11
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I've found a couple of spots needing fixing on the frame but nothing bad considering it's an 87 and came from northern Indiana. That was until I found this... I'm thinking the best fix is to cut one off another frame and replace it (right rear front spring mount) as I don't think I will be able to pound it back where it needs to be. I noticed funny tire wear on the rear tires but didn't know if they were what came on it, but it looks like they were. But this looks like the worse part, and it isn't that bad, an hour or so with a grinder and MIG and it will be like new.
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Old 03-13-2009, 08:10 PM   #12
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Quote:
Originally Posted by coyote_94yj View Post
remember to keep the NP231C guts. they're bigger and stronger.
Yep already going that route, the C I'm using looks like it's never been in 4WD, and I have a complete 231 J in the same shape so between the two I should be able to make a like new CJ
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Old 03-16-2009, 07:28 PM   #13
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Busy weekend, got the spring perch cut off and replacement from a doner put on,FYI both front and rear perches are the same, found a bad spot in the rear, no real suprise there. Cut the motor mounts off and got all the other removeables off. Now the fun part cleaning it up! Rust converter came in today so I've got all that I need but time to finish it up! Put the softtop on the wife's YJ today, PIA but it's on! Had to align the new to us hard half doors and I put the soft doors on mine, almost 70 tomorrow, the top is going to be down!!
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Old 11-14-2009, 06:16 PM   #14
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OK zoom forward 8 months, has it been that long??? I've been around the world, really, and finally am home and have some time to get kicking on this project. Considering that it's been sitting for 8 months I didn't even want to start back at square one so I took the frame down and had it sand blasted. A buddy gave me two axles that I cleaned up and swapped for the ones in my wife's jeep so I could have some 3.73 gears, once I had them in the shop and the frame painted the assembly started.
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Old 11-14-2009, 06:25 PM   #15
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Pretty much new everything is going in, new springs, shocks, brakes, brake and fuel hard lines, new harness... Next was setting in the Chevy 4.3 drivetrain, did the frankenstine CJ split to the 231, front Chevy, rear Jeep... Was able to find a sweet spot that let me use the stock rear driveshaft and the front driveshaft from an XJ with no mods that was sweet! Ran into some major clearance issues using the stock trans skidplate so it had to go, welded up a custom unit that allowed me to tweek the drivetrain angles. Also with the 4.3 Vortec I needed 40 pulse per rev for the VSS so I added the unit here from Jag's that run, it will have a skid added to protect it from the unwanted bumps...
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Old 11-14-2009, 06:27 PM   #16
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OK, drivetrain in, angles good, wiring nightmare to come....
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Old 11-14-2009, 06:31 PM   #17
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Ok, next was the exhaust, using the Chevy Y pipe and cat, had to move the post cat O2 sensor, then Cherry Bomb turbo muffler and then stock Jeep tailpipe. After that was done and some major cleaning and rearanging the black jeep was brought in a the process started to peel the tub off, this was Thursday night.
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Old 11-14-2009, 06:37 PM   #18
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Friday started about 3:30 in the afternoon and got kicking on getting things apart, by 7 the old chassis was out the door.
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Old 11-14-2009, 06:40 PM   #19
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Cleaned up again and rearranged things so they would be ready to go first thing Saturday morning...
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Old 11-14-2009, 06:47 PM   #20
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Today, finished up all the little stuff I wanted to do before dumping the tub on, the on went the tub.. Went well and really only took about a half hour to get things positioned and the tub on, I've been doing all of this by myself, and of all the things I've done putting the tub on would sure been easier with someone there, an extra set of eyes would have sure helped! Tub on, had to do some chopping on the floor to make room for the TC shifter, not much. Had to modify the Hurst shifter I put in as it was hitting the counsel in second and fourth. Had to make brackets for the TC shifter as only one mounting hole matched up with the Chevy drivetrain. While I was at it I added my TJ gas filler.
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Old 11-14-2009, 06:51 PM   #21
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So I'm able now to stand back and take a look at my handywork. Looks like my measurements were right on and things are just like I wanted them. Now comes the slow time.. I'm moving the whole blazer harness into the jeep as the original was really hacked up and was always giving me problems. So things are going to be slowing down.... So that's where I'm at, thanks for looking
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Old 11-14-2009, 07:41 PM   #22
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marking this. And officially saying this is the craziest thing I have ever seen. What does it do? and can it be mounted somewhere else?
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Old 11-14-2009, 09:55 PM   #23
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The ECM needs a 40 pulse per driveshaft revolution signal called VSS, originally this came from the Chevy TC but now that half is Jeep and so I needed another way to generate it. No other place that it can go and work, it's the price you have to pay to go Vortec. It's one of those things that if I had known about it earlier I probably would have gone with a different (earler) engine, but it's what I had to use.
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Old 11-14-2009, 11:08 PM   #24
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can it not go up by the transfer case?
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Old 11-15-2009, 05:52 AM   #25
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I wish, but no way to attach it, and there is the sensor which must remain the same distance away from it. If you put it up by the TC the driveshaft slides in and out and would change the distance.
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Old 11-15-2009, 07:12 AM   #26
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If you went with an SYE you would have a fixed yoke and a steady place to mount that tone ring up out of the way.
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Old 11-15-2009, 03:57 PM   #27
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I didn't know that, I'll look into a SYE cause it sure would be a lot better if I could get it up there! Thanks!
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Old 11-15-2009, 04:41 PM   #28
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Very nice build man you did some good work
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Old 11-15-2009, 04:48 PM   #29
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Old 11-15-2009, 10:48 PM   #30
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if you need any parts u can message me ... im parting out a 1994 yj

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