Picked up my truck finally. [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: Picked up my truck finally.


pontiac59
11-28-2007, 10:23 PM
Well, the usual fiasco, the guy who answers the phone Monday says just show up, I get there and no one has a clue I'm coming. But that's good in a way - no one had started the truck in weeks, so I got to see it started from a complete cold condition.

It took cycling the glow plugs a number of times and playing with the throttle to get it going, but once it finally started, it runs good. It's a former Air Force truck, J-code 6.2, 3.73 rearend. It even came with a full tank of fuel - around 30 gallons at like 3.50 means the gas alone would cost more than half what I paid for the truck.

It has the dual battery option, JB7 brakes with hydroboost (work very well), and the rear tires are brand new; the fronts appear to have some use but not a lot. It does drive, it goes fine forward, but will only barely roll in reverse and any incline stops it cold. Apparently it spent the summer as a lawn crew truck, so the kids driving it were beating on it towing a trailer load of mowers from place to place cutting grass. That would explain the trans. Fluid was red but smells odd. With no plates on it I didn't try to drive it anywhere to check the no high gear situation.

The rust is minimal - the only bad area is the left front rocker and outer floorpan. What's funny is that part of the floor is one of the few places not rotted in my current truck. But it's all stuff that can be bought. It towed reasonably well - and I still can't complain about the gas 'burban, it towed that truck fine even up some steep hills. Stopping was another story, especially on roads that had been sanded, but I went easy the whole 45 miles or so. Given the US Gov't plate on the dash claims 5600 lbs, I figured it would want to push me around some.

While my first priority is the transmission, I had some dumb questions to ask...

It appears the rear doors were swapped out.. the panes have electric defoggers in them, but they're not connected to anything (also keys don't work in the lock and right door doesn't latch right). And there's no dash switch. I've never seen these on barn doors before. Anyone know how to hook them up so they work? A switch and wiring is no big deal, but looks like I'd have to solder wires up on the glass (probably a job best left for a warm day).

It has idiot lights for temp, oil, and amps - if I want to change those to factory gauges, can I just swap in senders for gauges and use the existing wiring? Any of those gauges diesel-specific?

It appears the PS/brake boost lines feed around in between the fan shroud and radiator - is there a fluid cooler in there?


It's a real stripper, even radio delete, but did have the RPO codes in the glovebox showing the 6.2 diesel, special paint, and some other things. I'm wondering if the differential is a posi or not - would it state that next to the code, or do I need to look up the actual code numbers?


I guess that's it. I have some work cut out for me, especially if I want to try and pull more MPG out of it, but at least it's safe on the farm.

95DuallyTD
11-28-2007, 10:28 PM
The posi code should be G80, look for it on the RPO list. If it isn't there then it didn't come as a posi, still could be but would have been added.

pontiac59
11-29-2007, 01:13 PM
Wow, thought I posted all the codes and the post is gone.

Anyways, axle code is 1GT4 "Rear Axle - 3.73 rat".

It also has 1ZW9 Standard Body CR Cha (change?), 4001AA Special Paint, and WE9701 with nothing following it.

There's also a 1D44 Ext. below-eye-line - not sure what it refers to.


It does have full dual exhaust on it, I thought that was maybe odd too. Pipes look small compared to the 3" single on my gas Sub.

BlueBurby1
11-29-2007, 05:54 PM
a 6.2 can get away with dual 2" pipes...which would be equivalent to a single 4"

pontiac59
12-04-2007, 05:08 AM
btt

http://www.dreamscape.com/pontiac/85sub6.JPG

http://www.dreamscape.com/pontiac/85sub7.JPG

http://www.dreamscape.com/pontiac/85sub8.JPG

http://www.dreamscape.com/pontiac/85sub9.JPG

http://www.dreamscape.com/pontiac/85sub11.JPG

http://www.dreamscape.com/pontiac/85sub12.JPG

Veggieburninburban
12-04-2007, 09:19 AM
a 6.2 can get away with dual 2" pipes...which would be equivalent to a single 4"
Not so, my good man:

Area of a circle = pi (r)squared

Area of two 2 inch circles = 2(pi x (1 squared)) =
2(3.14) = 6.28 sqare inches


Are of one 4 inch circle = pi x (2 squared) =
3.14 x 4 = 12.56 square inches

Exactly twice the area! (In fact, a single 3 inch is larger than dual 2 inch!)

farmer0_1
12-04-2007, 09:52 AM
i just put a new headliner in my moms old 85 suburban. takes abit of work and some cash but did all the work ourselves cost around 150 for new materials. i know this isn't top on your list but if you do want to tackle it sometime let me know.

High Sierra 2500
12-04-2007, 10:41 AM
Looks pretty good...

Don't know about the doors.

The gauge swap should be simple, but consider going with aftermarket gauges. The stock gauges are not much better than the idiot lights. Inaccurate.

The aluminum lines that run between the fan shroud and radiator are oil cooler lines. Not sure why they are routed that way but they are. If you look they connect to a cooler in the passenger side tank of the radiator and go down by the oil filter.

0lee
12-04-2007, 12:56 PM
The aluminum lines that run between the fan shroud and radiator are oil cooler lines. Not sure why they are routed that way but they are.

They are probably crossed over because they wanted the engine oil cooler on the cold side of the radiator and the transmission oil cooler on the hot side.

If someone can spare a set of these lines, I'd still like to have them. The aftermarket oil coolers are not an ideal solution, and I couldn't find any fittings that would fit for the radiator side tanks.

thejdman04
12-04-2007, 09:02 PM
congrats

pontiac59
12-04-2007, 09:53 PM
I thought of an oil cooler, too, but if you follow the lines, it's one circuit through the PS pump, brake booster, and this cooler. I'll have to look at it again I guess... been rough finding a trans for it without spending enough to buy a whole other truck. Which would be fine if it was a $200 truck, but so far it's been looking like $600-$2200. I'm thinking I may as well just drive the gas truck the rest of the winter, through the salt and stuff, anyways; it has good snows and a posi rearend, I never had a problem getting around with it.

0lee
12-05-2007, 12:03 AM
Hm, the Tahoe had a cooler for the PS/brake circuit. Maybe it's part of a towing package?

Anyway, it's a nice truck, and it would be a pity to have it rust from the salt.

Veggieburninburban
12-05-2007, 04:54 PM
OH YEAH! I remember now! My burban has that PS cooler loop too. It simply routes the PS fluid in front of the rad. I never gave it a second thought. It doesnt bother me, so I dont bother it.

0lee
12-05-2007, 09:39 PM
Hm, that leaves the question why some have it and some not. Mine doesn't have it.

High Sierra 2500
12-07-2007, 10:45 AM
Yeah, a transmission is going to be expensive. What transmission is it? TH400 three speed or 700R4 four speed?

Consider building the trans yourself too. They're not really that complicated and if you are willing to spend the money on the parts, tools, and manuals you can build a real nice tranny... The only thing when you do it yourself is there is no warranty.

pontiac59
12-07-2007, 11:41 AM
400 in it now, but as long as it needs one I'll put a 700R4 in it.

All I need to do is find another cheap Suburban, with a good trans and a bad motor.. I have a line on one now, blown up 6.2, rebuilt 700R4 with not many miles on it. Bonus is the body isn't bad, so I might put the doors and fenders on my rotty gas truck and try and get a couple more winters out of it. Plus save all the stuff off the blown motor, injector pump, glow plugs, controller, alternator, starter, etc etc -


When I was in college, we spent a little bit of time on automatic transmissions, I have somewhere an ATRA certificate that basically says "you have a clue how to tell an automatic transmission needs work" but the GM TH350 or TH400 they had on the bench in pieces, the thing may as well have been a jigsaw puzzle of a white rabbit in a blizzard once you get beyond a filter change or anything external. The only way I could maybe build one is if I took a digital picture every time I took a part out of it.