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big yellow tow truck

I never played with them, but whenever I see them in a junkyard, I always check them for the fuel/tach combo gauge because those only came in these C60's style. Those sell for $300 on ebay and the yards will usually let you have 'em for $20. The air gauge also only came in c60's too, it is a nice addition, I have one of those in my K5's gauge pod showing my OBA status.
 
well got to start bustin aSS on this old girl . last week or 2 I been crossing off the list of things to do .

yesterday I made these frame extensions in shop with my new toy 20ton PRESS BRAKE kit from swag offroad for the harbor fright shop press.

then today I welded them in place and fish plated the insides a bit just incase . . . and bolted the bumper back on for good after I welded a pair of tabs on for a winch mount .

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Sweet rig!!! What are the frame extensions for, winch mount, plow mount,...?

Oh, and I say, keep it all yellow, it's awesome!!!
 
big push bumper was shoved up to the body with no real gap . so I moved it out . this also let me add a winch mount point on top of the bumper and not hit the front sheet metal .
 
some updates to this old girl .

well I asked a few old timers around town and even they had no real idea since its so old and 4x4 napco that you just don't see much of .

so I tore in to it today .

here is the run down .

pic # 1 = bottom of backing plate back side 2 adjustment bolts with jamb nuts and lock washers .

pic #2 = adjuster / shoe lower retainer unit removed / cleaned / wire wheeled to get it to work and understand how to make it adjust .

pic #3 = all cleaned up and lubed with copper anti-seize .

the jamb nuts back off just a bit .

then the pinched flat head gets turned as its a off set cam bolt . it has a round washer riding on it that the shoe lower hole sets over and all acts like a crude bearing piviot point.

the 2 pinched head adjuster bolts each have a pin mark in them to indicate were the adjustment currently is at . close together/center = new shoe or no major wear . the farther they away to the opposite sides of each other = worn out shoes and replacement of parts needed.

by the looks of it its not a 360* rotation of adjustment just a 180* range of adjustment . so you can roll the adjustment bolt each way and get the same results.

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now for the upper nut /spring looking thing .

there what I think is a return limit stopper for the shoes / upper adjustment . this keeps the wheel cylinders from dropping all the way back in and having to pump the pedal up to get brakes.

pic #1 = backside of backing plate up near the 10-2 positions .

pic #2 = the closeup of the inside of the unit on the backing plate . this is a around a 360* range of motion for adjustment . so you will have to play with this to figure out what way to go . ( will be easy for me with apart )

pic #3 = whole backing plate .

the inside off set cam pushes on the brake shoe metal part its self to hold the shoe up and against the drum face .

last is a pic of the closest style of brakes to learn how to adjust them up .

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few pics of axle turn down a bit to change bad seals for gear oil to stay in the housing and NOT the knuckle area.

fyi : stock neck-down dana 60 inner 35 spline for size refrence. 1.50inch
napco 4x4 shaft is 1.61ish dia didn't count the splines yet. not that many tho .

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got my seals yesterday and installed today . r-side back together .

these seals fit like they should that for sure compared to old ones.

skf / cr 16650 seal was the closest find from measurements of seal area on shaft and seal bore in housing . they fit good and tight with seal driver and 4lb mini hammer .

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removed the front cover today to clean / reseal it . . . was ozzing oil near bottom .

WOW :eek1: that diff is FULL hardly any room to fit a dime thickness between the ring gear and case body . cant even see the pinion gear . it even has a load bolt setup to control ring gear deflection . . . .old school stuff.

inside she looks just like a 14ff but MUCH BIGGER :deal:

7.20 gear ratio in there from way back then . open diff no traction device . and boy does she like gear oil almost 2 gal worth to fill up . the front napco axle

the t-case is a Rockwell t223 unit . 2.00 low range and it has a ramsey pto unit that's never been hooked up for use on the back of it . this old girl wanted 3 qrt of oil also with the drain / fill I did on it.

just about done with tinkering with this old girl and ready to go back to its home by mid week I hope . if I stop checking stuff over and finding more to fix . . . :ignore:

with the 4 speed / 2.00low / 7.20 gear / 39" tires she is 101.52 : 1 crawl ratio factory :eek: no doubler required :grin: and if she was to ever get to 70mph ( tire and safety limits ) she would be 4350rpm :shocked:
 
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I had a T223 Rockwell divorced T-case in my '72 Chevelle Wagon 4x4 --its straight cut gears whined just like a blower,everyone thought I had one on the 454 in it..I loved the sound of that thing!..

I wish I'd kept that thing more and more--the divorced transfer case was a plus,it allowed the use on any transmission you wanted,and it didn't have to be from a 4x4 with the "special" tail shaft..

4,350 RPMs at 70 mph ?...no wonder those big trucks with Detroit's sounded like they were screaming at 50 mph!..:eek:...still think those had the coolest exhaust and "blown diesel" sound ever known..
 
@diesel4me are you sure it was a t223 and not the smaller baby brother t221 ?

the t223 is a BIG pig used in the bigger trucks . looks almost like the smaller brother t221 .

easy way to spot one is drain/fill plugs are on driver side of case for smaller t221 . . . . and bottom and front face for the t223 unit.

and yes I love the divorced case it opens stuff way up on options . just as long as you have the driveline room for it .

my buddy is looking to do a 4x4 project and the tranny he wants to run was not ever ment for a 203 range box . so we might use a divorced 203 range box and then doubler kit for a divorced doubler unit.
 
It may well have been the T221 version,it was the original from the '69 K10 Suburban frame & drivetrain the car was converted to...

I saw one huge Rockwell divorced transfer case on an old army 6x6 another salvage yard near me had..it looked just like the one I had did--but on steriods!..that is probably what your truck has..

I have seen a home built cranberry bog buggy that had two divorced transfer cases coupled together to make a doubler!.(Quadrupler ?) .thing had more shift levers than a backhoe...it could climb walls too,at like .005 mph in low gear ...still could hit 40 mph in high range !...they used it to spread sand on the bogs..
 
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