Truggy Build

[Jester]

As most of you know, a '86 Standard Cab followed me home from Dwight's almost 2 years ago. I thought I'd keep it stockish for a while, and actually tried to wheel it a bit at John's at the 2010 Christmas Party. Then I went to KOH for the first time in Feb 2011 and plans changed. Then I found frame rot behind the cab and just chopped it off. Its been an on again, off again effort, but I decided I'd start a build thread to keep me focused. My goal is to wheel this at Fall Crawl 2012.

Specs:
1986 Standard Cab Toyota Pickup
Engine: Fuel Injected 4.3 liter
Transmission: TH350
Transfer Cases: 23 splined doubled up Toyota cases, gently broken in by Matzell
Rear Axle: 14 Bolt from CUCV truck. 4.56 gears. Detroit ish locker FULL WIDTH (67" WMS)
Front Axle: Dana 60 from CUCV truck. 4.56 gears. ARB locker. Stock inners with Dana 70 (35 spline) outers. Poly Performance Drive Flanges. Lots of new Dana seals and bearings. FULL WIDTH 69.5" between WMS
Wheels: 15" Eaton 32 bolt beadlocks w/ 3.5" BS
Tires: 39 x 14.50 x 15 Pit Bull Mad Dogs
Front Suspension: SAS using stock rear springs. Shackles in front. Shock selection pending.
Rear Suspension: Double Triangulated 4 Link with a bunch of cool parts from great vendors. Planning coilovers if the budget holds out.
Body: 2" Body lift so hood will close. Smoke Gray Rustoleum Paint. Exo cage planned.

Still figuring out the rest.

Here are some pictures along the way so far...

 

[Jester]

Early days

Technically it has 1 tons under it

Mock up

This junk had to go

 

[Jester]

Dana 60. Don't ever try to put an ARB in one of these w/o a case spreader.

Yes, I am a Pirate. 100 years too late. Cannons don't thunder there is nothing to plunder I'm an (almost) over 40 victim of fate...

14 Bolt, with the optional shovel attachment.

 

[Jester]

Rattle can rebuild of the 4.3

Drivetrain mockup. Fits good, except the last shifter is behind me. Have to work that out still...

 

[Jester]

Crossmemberment

Bracketology

 

[TCinVA]

Very nice work, that is going to make a great crawler, but what will you do when you scratch it?

 

[Jester]

Very nice work, that is going to make a great crawler, but what will you do when you scratch it?

More Rustoleum Smoke Gray of course.

 

[matzell]

looks good Tim. I can not wait till you get that going!

 

[cruiserjohn]

Hey are you trying to be like me and set things on fire when you weld??

 

[mwalls54]

nice progress. you going to retire the 40 to street duty only?

 

[bkfj40]

nice....I wish I could pull stuff together like that.

I think ironpig should come out with their patented nomex hoodie.

 

[John Smith]

Hey Tim, Are you selling the IFS front end parts you removed? I am interested in all the parts from the spindle to the hub dial.

 

[Jester]

Hey Tim, Are you selling the IFS front end parts you removed? I am interested in all the parts from the spindle to the hub dial.

I still have the hubs. not sure about the rest. interested?

Was asking $75 for them here but will take $50.

 

[Jester]

nice progress. you going to retire the 40 to street duty only?

Thanks Matt. It only looks like progress because I haven't posted anything about it for the past 18 months.

As far as the 40 goes, it is in street duty mode now w/35" ATs. Thinking about selling it if anyone is interested. Getting to be too many mouths to feed around here if you know what I mean.

 

[mwalls54]

nice color. I might know some one that might want it.

 

[Jester]

This weekend I hope to take the theoretical and see if I can make it match reality. May have to work the numbers a bit now that I know what the brackets actually look like, height of the truss, crossmember location, ect...

 

[Jester]

Not a bad morning's work...for me at least. Supposed to get some help later today to check my math and burn some pretty welds.

 

[John Smith]

I still have the hubs. not sure about the rest. interested?

Was asking $75 for them here but will take $50.

Thanks, but I need more than the hubs. Have fun with the truggy build.

 

[matzell]

Tim,

Get this thing dialed in so we can do mine! Those parts look great, I may have to swing up and look at it in person....

 

[Jester]

With Vince's help, and the energy drinks he brought over, we got it all tacked up last night. I owe you my friend.

I'll get some pics up later, once I drag my tired butt out to the garage. These days I'm more likely to get up than go to bed at 4 am.

There is still a debate over RH & LH inserts that needs resolution before final welding. I need to do some research and I welcome input. Do I pair up two LHs or RHs and not worry about the links loosening, or do I utilize the infinite adjustability of a RH/LH pair per link?

So if this works out really well, or not at all, here is the final numbers I ended up with for those who may want to learn from my experience:

Wheelbase: 110
Tire Diameter: 39
Tire Rolling Radius: 18.5
Vehicle CG Height: 39
Vehicle Mass: 4,000
Front Unsprung Mass: 800
Rear Unsprung Mass: 750

Upper Links: x, y, z
Frame End: 42, 17, 31.5
Axle End: 0, 2.75, 28

Lower Links: x, y, z
Frame End: 48.5, 3.5, 26.25
Axle End: 3.5, 23, 18.5

Static Anti-Squat: 83% (Upper Links are Adjustable, so an AS of 118% is possible just by raising Axle end 1" and Lowering Frame End 3")
Roll Center Height: 27"
Roll Axis Angle: 0 degrees (Roll Oversteer)
Instant Center X-Axis: 114"
Instant Center Z-Axis 37"

I used the 4-link calculator created by Dan Barcroft (Triage on Pirate).

Ironically, the stock '86 Rear Mini Truck driveshaft will work!