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Johnny's GoatBuilt JHF buggy build

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214K views 993 replies 64 participants last post by  JohnnyJ  
#1 · (Edited)
At post 110 I changed my mind and decided I would build a buggy instead of the Wag. The Wag continues to wait for it's next build.

At post 187 I ordered up a GoatBuilt JHF chassis to hopefully speed this up. (edit: nope)

Current Build plan:
GoatBuilt JHF Chassis, 108" wheelbase, "jeep" hood and grille
2007 Ford F250 Dana 60, 5.38, Sparty locker, JHF high-steer
- narrowed 4" to use 78 F250 axleshaft on the long side, using factory 1550 shafts
1998 Chevy K3500 14-bolt, shaved, 5.38, Detroit, 1/2t chevy disc brakes
39" BFG Krawler Red labels on KMC Machete Beadlocks
2001 GMC Yukon XL 6.0L LQ4
  • Holley TerminatorX EFI
  • Champ oil pan (high-ish clearance, baffled, steel)
  • Dorman LS2 car intake and Warr cable throttle body
  • Holley fuel rails with late-model 6.0 truck injectors (EV6, E85 flow rates, 12613412)
  • Goatbuilt accessory brackets, TC pump on driver's side, alt on passenger
  • GM 706 heads
  • BTR Truck Norris cam
TH400 built by Tranny Tom, Reverse Manual with Winters/WOD shifter
Atlas transfer case, 3.0 low range
Fox 2.5 air shocks
PSC Full Hydro, 2.5x10" ram, TC-pump
Mastercraft cheap seats with Impact 5-point harnesses
Griffin 31x19 radiator, Derale 16927 shroud and twin fans
Goatbuilt fuel tank and factory fuel pump
Magnaflow muffler mpe-12649

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I bought my Wagoneer in 1997. It was my first 4x4 and I bought it so that me and my friends could go camping and have room for our gear since we all drove econoboxes. That fall I ended up moving to Germany for 18 months and it went into storage.

When I got back I rebuilt the AMC 360 with the help of a friend, and we did enough maintenance on the rest to get it on the road. Over the next few years it got a 4" lift and went from 31s and then 35s when I put a 3" body lift. We did some wheeling with it and eventually I put it on 33 Stampers from my old Wrangler.

In around 2005 it was parked due to lack of time and using any spare time on my Wrangler. A few years later we stole the drive train for the TREC Wagoneer, and it has sat since.

Over the summer I got out of racing, bought a RZR and drug this back in the shop. I'm thinking I want to get it back on the road and trails.

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#332 ·
Friday night I messaged Jesse Haines and asked how he set up his drivetrain. He said Atlas 1/4" off frame and skid and crank centered. The tcase spacing matches what Roxroes suggested.

So I borrowed a spare Atlas from Hoser and mocked this up. The seat frame just barely clears the atlas shifter extension off the back, but this is 2" deeper in the chassis than the 205. WIth the drop of of the case it gives me plenty of space under the seat.

There is about 1/2" clearance under the trans pan running a factory 3" truck pan. Only thing I can't check right now is converter clearance since I had to move to my mockup empty trans since the th400 output is too long for this Atlas setup.

I'm thinking of moving the drivetrain 1/2" to the front of chassis and building some mounts. That will give a little more clearance to between seat frame and Atlas.
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#335 · (Edited)
Time has been short lately, but had some time on Saturday after being out of town over Memorial Day.

I'm working on a trans mount. The first idea was to see if I could tuck the bushing directly under the trans mount. That didn't work as it left < 1/4" between the mount and the belly skid. So I debated whether to hard mount or if I could fit the poly mount to the front of the cross-member. This is how i left it on Saturday.

I had to notch the crossmember, and will add tabs and a box in around where the poly mount intrudes.

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#336 ·
That's how I did the trans mount in order to flat belly my TJ. Just a flat plate tied into the side of the bushing tube with some anti-rotate gussets. Works great.
 
#342 · (Edited)
Axle rough placement. This is approx 4" above planned ride height. I'm happy with where the diff is side to side. Still lots of packaging to do, but I think it'll a good path to get to the front carrier bearing.

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Looking at Jesse's build, his front axle is about 3" to the front of the chassis than where I randomly slid it in. With that,I think I may slide the drivetrain forward about an inch. That gives a little more room around the torque converter, and a little more room under the seat.
 
#344 ·
Was on vacation with the family for a week, but got out to the shop on Sunday and move the drivetrain forward 1". Trans mount is pretty much done, now working on engine mounts.

Ordered up 39" Krawlers and KMC Machete beadlocks. Wallet is on fire, but hoping to finish up engine mounts and get going on suspension. Wanted to have tires and wheels here to check for clearances.
 
#354 · (Edited)
I reinstalled wheel studs in a hub I had redrilled for 8x6.5 and checked fitment of a wheel. It slid together nicely. I was 99% there would be no issue, but it's always nice when a plan comes together.



Yeah, compared to Racelines on the last car, these seem quite a bit beefier. I had looked at Dirty Life's a number of times, but couldn't find anybody with feedback to see how they are.

I went with these since you can get a replacement through Summit in a few days. So if I do destroy one, I knew I could get replacements easily. In the past I've had to jump through hoops to get beadlocks, and I'm sick of that.


Pretty sure, but I'm going to flip them and run them pointing back. They need a little massaging, but fit pretty well. Will need 90* boots on the plug wires or risk burning them off.
Was over at Hoser's this weekend and saw he's running MSD 90* fittings on his plug. I may steal a plug wire next time I'm over there and verify it will work with my stuff.