My Build Thread (year+) on 71 Jimmy 4x4

[Burt4x4]

YYYYYYYYYYEEEEEEEEHHHHHHHHHAAAAAAAAAAAAA!!


Looks Awesome !!!

[RckyMntnKng]

Ok this thing needs a doubler, and Ive had a hard time finding a good used deal on a np205 with the 32 spline from a th400. That's what everybody calls for...ORD, NWF etc.

My truck had the 27 spline th350 style np205 stock, and so the bearing is smaller and to change the input shaft would be a pain or more expensive than waiting to find the right transfer case.

While back I found a Th350 style Np203 and adaptor, so I know i can mount the range box to my Th350....

Well i found a very cheap 205 from an 86 chevrolet 1-ton that was mated to a TH400. Looks to have the 32 spline long input shaft (would have to be changed for short shaft), and I guess a slip yoke rear output. It also has some sort of PTO that ran a 12k generator. All this stuff works flawlessly and the date on the 205 is March 13th 1986.

So now I have all kinds of crap, any advice on what I need or don't need to make the doubler? Anybody know anything about this style or brand of PTO?

First 3 Pics are the 86 np205, 4th pic is the 203 and adaptor, 5th is the stock np205 and 27 spline adaptor

[RckyMntnKng]

About time to make some progress.

Rear end was sitting too low for me in relation to the front, and was only going to get worse when the rear seat, spare, cage etc goes in.

Installed a Rough Country add-a-leaf to the pack each side out back as well as a 4deg steel shim to set the yoke angle perfect. Was able to just pull the tires, drop the axle 1 side at a time, unbolt the pack, add the leaf in, add the shim, longer bolt, compress with C-clamp - Walla.

Before and after pics. Added about 2" to the back

[RckyMntnKng]

Rear seat needs to be setup. Also decided to go Pork-Chop on some tool-boxes. Seems like a perfect setup for the small rear area to work with on these Jimmy's.

Decided to go simple on the rear seats which are pulled from a yukon 3rd row.
Unbolted all the stock bracketry, pulled the covers, and welded a tube frame to the steel inside the seat. Set it up to match the height of the front seats, and got it ready to bolt to the floor, once I get some backing plate. Will finally get it welded to the frame as well. Seats have 3 sets of seatbelts, including shoulder belts.

So this stage isnt finished but you get the idea. Toolbox's work nice for a tone of lockable storage and serve dual duty as arm-rests and eventually cup-holders and maybe even speakers. Everything will get Rhino Lined black after its all setup.

Also working on some Light brackets on the cowl, just test fit for now that will have control-lights on them. (handle and moveable)

[Burt4x4]

YYYYYYYYYYEEEEEEEEEEEEHHHHHHHHHHHHHHHAAAAAAAAAAAA!!
Me Like! All Black on the boxes too? Should be sweet!

[RckyMntnKng]

Thanks

Um I think your avatar profile pic just convinced me not to mount lights on the cowl!


I will let you guess whats happening as we speak......

[Burt4x4]

hahaha, ya if you go thru brush at all they could get hung up/scraped. I have managed to bust that pass side miror like 4 times.
Thoes seats fit in there nice!
Keep up the good work!

[Burt4x4]

hahah I have been working on mine sence 1993

So yer right on track!

[RckyMntnKng]

Those darn TrailReady guys were running a closeout on there steel beadlocks and sucked me in. Oh well these are really bad-azz and im tickled to get rid of the 80's style sawblade rims.....

Long story short....its quite a process getting these mounted up correctly in the garage. I added 12oz of balancing dyna-beads to each wheel as well. wonder how its gonna work...but heard good things about them.

my buddy there been through all the build...have to give him the second set of keys when she finally done

[RckyMntnKng]

SCORE another for Craigslist
1971 GMC Model - WARN Bumper

Found It on accident but it was a must buy and is in great shape. A coat of primer and paint will make it new again.

[lks dcvn]

Nice find - CL is so much better than ebay at times - except when you miss stuff by an hour -

[VanceH]

Nice build we should try to get a ride together for all of us who live close!!

[Burt4x4]

hahah Nice! I like the way you work!

[RckyMntnKng]

Its not my fault....as soon as I see a wrench my mouth starts to water. Must be genetics

[RickBost]

Would you be able to use a 203 from a th 400 and a 205 from a ford to do that? What would i need to buy if i could?


thankx

[RckyMntnKng]

Not sure on that one Rick. I had to do alot of reading to see what parts were correct on mine.

My first thought on the 205 from a Ford is the output locations.
I would think the ford 205 has the front output on the driver side, opposite from a chevy version passenger side drop. Maybe it could be mounted upside down with a cable shifter....but Its pretty easy and inexpensive to just find the chevy 205 somewhere and probably worth all the savings in fabrication, working out kinks, and headaches.

As far as the 203 goes, any of them from a GM will work as long as the adapter plate you use is correct for your tranny....a th350 has a 27 spline male output and the adapter has a female 27 sleeve that couples them. A Th400 has a 32 spline female output etc.

If you go looking for a chevy 205 to do a doubler....make sure you get one with a 32 SPLINE female input. All the adapters ive seen require this version. you can change a 27 spline 205 from a 1/2 ton into 32 spline from a 1 ton if you change the shaft and mill out the case for the 3/8" larger bearing it takes.

Good luck - its a fun process and im glad mines almost over.

[RckyMntnKng]

Prep and Paint - My favorite

Cage is being delivered soon.....so I better get the interior ready.

Cleaned out the rear end, sanded it all down by hand, sprayed out the dust with compressed air, wiped out every nook and cranny with Mineral spirits so it has a nice scratched up non-oily surface for some primer and bedliner to stick too.

Added a coat of spray primer....and then the first thin coat of Bed liner.
Second coat will happen this weekend.