Build Thread JHF Trail Chassis

woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
Most important, sightlines....from the passenger seat, pic one is my view....I see only the dash tube
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Pic two is a couple inches higher....now I see all the tubes

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If your seat position is the correct height, you have the first view.

I'm a proportional 6'3" tall and 195ish pounds (well, I was before a case of Montezuma's in Mexico on Monday...uugh)

An idea of legroom... plenty for a full day of wheeling
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woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
With the supercharged L67 3800 and it's "cabin" facing intake, lifting the motor up for removal would require pulling the throttle body...to make that easier; I've removed the tube and will get interlocking tube clamps to reattach/remove as needed. Fortunately, the cage structure is so solid, the first sawzall cut just barely jammed the blade.

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woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
Glad to see you going with Jesse's axles.
Careful how tight you mock up the tcase. The new one is bigger on all four corners. And shifts from the top
You mean the case that will likely never arrive? Not an issue now...no longer needed or wanted.
 

woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
Fun with transfer cases?!!? Parts swapping between two Dana 300s...keeping my 32 spline front and rear outputs, swapping out the 4:1 Lomax gears for stockers, and re-sealing as needed.
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The transmission cross member is ready to be welded.
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And for the bling, an aluminum intake tube
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I am being as patient as I can be with Behemoth for their billet D300 case, but 3 months beyond the delivery promise has me about done. For the 10th time, it's shipping tomorrow.
 

Lil Rich

Spotter Required
Media Partner
Nov 26, 2016
164
Sand Hollow
I can't believe all the T case work that you have been doing. Sucks for Behemoth as well, they better get s shipping confirmation today... been long enough. And I think that mount is simple and effective.
 

woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
First off, WE HAVE PORTALS!! Still waiting for Jesse's laser cut link tab kit, but hoping to get these mocked up shortly.

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Seat mounts: Stole some of the tabs that @Lil Rich had to get an initial mockup for my seats and start the interior tube work for the dash and such. Still working thru some unique oddities with the 3800SC motor and it's rear-facing intake position, but believe we have a plan.

I modified Jesse's original brake pedal bracketry to allow for a heel pocket. The original design placed the horizontal bracket flush with the top of the rocker tube. Positioning it on the bottom edge of the tube allows for a ~1-1/2" deep heel pocket, and that's helpful with my 6'3" frame.

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Also started getting ideas for placement of the M40 shifter from Sand Hollow Offroad. Between that, transfer case levers and rear cutting brake levers (plus switches for rear steer and the rear locker) it'll be a trick to position everything...both for space and ergonomics. The shifter needs to be located to easily make quick moves from 1st to reverse, and the cutters needs to be located so the pull starts almost at arms reach. I'm guessing the rear steer and rear locker switches will be located either on the front face of the shifter, or just off to the passenger side. Decisions decisions....

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I'd initially intended to mount my Optima ahead of the motor and behind the winch place on the drivers side (short V6 means plenty of space)....but @Lil Rich noted that the battery could reside below the drivers feet (and in my case, behind the heel pocket area). Definitely another good option, and it helps keep weight low.

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BTW: I'll be updating the first post in the next day/two with part numbers for everything....partly for those looking for ideas, but also for my own aging memory ;)
 
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LJTim

Loves Light Bars
Jun 17, 2020
10
Utah
I'm so in love with these builds. It's awesome building them side by side so you can work out some quirks as you learn from one to the other (and borrow tabs and such).
 

woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
Starting today out with some CAD work...

Rugged Radio and a oil/water/trans triple gauge above...
Round 12v-USB/cig/Anderson triple below the dash tube...
Sharpie hole for the air intake...

Could cut in gauge holes to the left of the intake hole, but lose options for switches.

The knee room width is about 19-20" from the door bars.

"should" make tunnel panels fairly easy too, just some single brake bends for each. "should"...

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woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
More with dash design... Top panel will be a trapezoid that's 19" wide at the A pillar and tapers to 10". The vertical panel will be 10" wide and around 14" tall (meeting at the top of the trans)

May adjust and pull it back another inch closer to the firewall... Decisions decisions...

(bungee aided design at its finest!)

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Dropped my cardboard cutout in place, plus the Rugged dualband and a too-large triple gauge cluster... Room for a battery disconnect ahead of the gauge too. And, there should be room to turndown the intake hose and have it exit into the passenger footwell for the air cleaner, and allow more space/options for switches and such. More hhmmmm

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whiterhino

Spotter Required
Nov 10, 2020
28
michigan
You are at one of the hardest stages. Nothing is set in stone so everything is a variable. Once you start locking in some decisions it will get a little easier.
 

woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
Steering is mocked in...orbital sits just above/behind the winch plate.


The view from the drivers position....the u-joint is hidden by the steering wheel perfectly. Tip your head to the drivers side slightly and you can see the front "bumper".

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Two steering joints to snake everything inside the chassis and maximize visibility. Cut the "ears" off this for the steering shaft bushing/support


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OldRocDoc

Spotter Required
Dec 26, 2016
35
Is the multi-joint mechanical steering designed to place the orbital far from the driver, or to place it closer to the pump and front steering ram? There is a lot of new hydraulic thinking that I have not kept up with.
 

woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
Is the multi-joint mechanical steering designed to place the orbital far from the driver, or to place it closer to the pump and front steering ram? There is a lot of new hydraulic thinking that I have not kept up with.
My goal was visibility, and the V6 allowed space up front out of the drivers view
 

woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
So, I decided the seat angle on the PRP's was a bit to relaxed, and that a slightly straighter seatback would be more suited to my normal driving position, as well as allow for better thigh support in the car. @Lil Rich suggested putting them in the press and squishing them....carefully....and, it worked!!

The crossbar of the 20T press is removed, and the angle iron support bar just above the floor was double padded with a weld blanket and a retired airplane blanket....the front mounting seat points were carefully aligned with that bar, the V between the feet and the bar at the front of the cushion. A 2x2x10"ish piece of .250 angle iron, with a couple short angles welded to the V to provide a flat spot for the press, was placed on the top of the seat....again, a retired airplane blanket and a canvas bag for cushion and protection.

Three measurements were taken to be SURE I could duplicate the process equally on both seats. 1> measure from the sub-harness slot to the top of the seat... 2> measure from the concrete floor to the top of the seat... and 3> measure the distance that the hydraulic jack started at when pressure began and MOST IMPORTANT...the distance it was stopped at (to ensure both were squeezed equally) That measurement was taken between the spring and the jack.

In my case, the compressed/final distance was 13"....started at 11.5". 1.5" of ram pressure applied to "squeeze" the seats tighter. And YES, they turned out perfectly!!

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Since the rear link tabs were all welded in, there was no reason to stall on getting the rear axle in position, the spindles installed, and getting the tires/wheels on.

Damn, it looks good.....

IMG_20201216_130509_298.jpg
 

woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
Tonight, shifter mockup....to put Reverse a comfortable distance away, the forward edge of the shifter is recessed into the dash. 1/8" plate with nutserts to hold the front edge, new bracket to mount the rear pending. (Or...just leave the wood....ha) Will get a seat mounted tmrw and test fit.



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woody

eternal noobie
Staff member
Oct 12, 2010
1,241
53
Toquerville UT
Started on the dash tonight, got a couple done before it turned wine:30 😎

Cutout for the M4O shifter turned out perfect...and the engine air intake will have just enough clearance.

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Oh yeah, the front diff arrived yesterday from Nitro Gear - NEW Toyota case built with their spool and 4.88 gears. Bling bling!

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