702 GMC V-12 powered '62 GMC 1-ton

[cayoterun]

I'll check out the local malls (junkyards) for a straight frame, leaf spring setup.

I was able to drop the motor by modifying one crossmember, and will have to build one other crossmember for the rear side motor mounts, which both are real easy on this frame.

After I dropped the motor, it only left about 10 inches of ground clearance below the oil pan. Would sure have to be careful crossing "humps" with this long frame.

If your new on this board, Locomotive Breath, Welcome, It's a great place for help, info and entertaining banter.
Thanks,
Cayoterun

[locomotive breath]

Thanks Cayoterun.
10 inches clearance should be enough as long as the suspension isn't too soft.

[jeffspower]

This would be a cool truck to put your engine in- or at the least, find someone to save it from the crusher!!!

http://67-72chevytrucks.com/vboard/s...=1#post2732402

[cayoterun]

Been watching it today. Tempting to bid on it, don't have long to go. It's not far from here to go after it.
I may go berserk, bid on it and just suffer Mama's wrath if I won. Some of you have a spare dog house?
Cayoterun

[jeffspower]

Yep, closer to you than me. I'm gonna cry if it gets scrapped. I wonder what they think it weighs? they could think it's 15000 lbs, @ what, $220 a ton scrap? I wouldn't think it would weigh more than 9000 tops. A new 33K GVW bare chassis T300 KW with an 8.2 Cummins, Fuller & 128" CA weighs just under 11000. I bet the REO as a bare chassis woudn't be over 6500.

Just buy it- you know you're gonna loose sleep too if it's lost!


8 minutes to go...

[cayoterun]

Let's hope it don't meet reserve. I did e-mail him and it only has a 4 spd.
Cayoterun

I did get the mounts built for "Balaur" in the Ford 1ton. Came out pretty good so far. (yea, I'll bend over and you can do the kickin') Oil pan will be pretty close to the ground, but can put a skid plate under it if necessary.

[locomotive breath]

It should be worth $800.00. At first I thought it was pretty ugly, but the more I look at it the more I see some potential. It is a rare old truck.

[Hoods69BadBowTie]

Yea I would think it was worth that much.

[68GMCCustom]

heck yah.......it's already rollin' 20's

[watahyahknow]

found sumtin that might help
http://www.usa6x6.com/gallery/displa...album=14&pos=4

[jeffspower]

Neat. I like this one:

[cayoterun]

Really neat. I think I'd like it better with single axle, instead of a tandem. The cab is nothing short of sharp. Something about the windshield needs streamlined some how. Great color scheme, too. Add 2 more ft to hood, we'll drop "Balaur" in it. You guys furnish the truck, I furnish "Balaur" and we'll call it mine. IMO, that would be a fair trade.

We're going "junkin" the next couple of weeks for the museum. May find some more interesting "stuff".
The Weather Channel was out there a couple of weeks ago, did a documentary on the "dust bowl" Used stuff ( a Model T, clothes, etc, and some people) in their film out of the museum.

[Pyrotechnic]

A crewstended cab! That looks like a party.

[cayoterun]

Found some "no sellums, gonna' fixums" and some museum pieces in their annual "Santa Fe Trail" celebration.
1947 Spartan trailer house, a 1916 Dort Hearse, (so rare, value can't be determined, body all hand carved wood.) Some Conestoga wagons.
So much for our last ten days of "junkin" and celebrating.
Fuel cost hit $.50 per mi. on the '97 454 this week. We'll be tinkering in the shop for a while. Gas hit $4.00 @ 8mpg.

We were invited to bring "Balaur" to Adrian, Mo. and run it in the stand, to an antique truck and tractor show this month but turned down the chance due to fuel costs. Goodness, will it ever quit???
Cayoterun

[watahyahknow]

been looking into trannies , a allison 540 automatic might be the best one for the aplication , its a 4 speed vaccuum operated can hold up to 320 hp 1000ft pounds of torque and operates at a max of 4400 rpm there found in schoolbusses and light trucks there pretty common

[cayoterun]

I have a 5 speed direct tranny that fits the motor. Big hurdle.

Also have a 3spd auxillary tranny. Ratios: L=2:1 D=1:1 O=.85
If we turn the auxillary backwards, in aux. low, will that double our mph in each tranny gear? If so, we may be running 60mph in 4th gear @ say 1900rpm.

For the gear calculation, with a 4.10 rear end, would we use 2.05 rear end ratio to get correct speed in each main tranny gear?

Also, would the Aux still lubricate ok for the limited use and mileage this truck will be used?
I'll still have to have both drive shafts built to connect it all, regardless of which way the aux. sits.
Thanks,
Cayoterun

[89 crew]

Originally Posted by cayoterun

I have a 5 speed direct tranny that fits the motor. Big hurdle.

Also have a 3spd auxillary tranny. Ratios: L=2:1 D=1:1 O=.85
If we turn the auxillary backwards, in aux. low, will that double our mph in each tranny gear? If so, we may be running 60mph in 4th gear @ say 1900rpm.

For the gear calculation, with a 4.10 rear end, would we use 2.05 rear end ratio to get correct speed in each main tranny gear?

Also, would the Aux still lubricate ok for the limited use and mileage this truck will be used?
I'll still have to have both drive shafts built to connect it all, regardless of which way the aux. sits.
Thanks,
Cayoterun

In theory yes, by hooking the second transmission up backwards should give you the gears you want. Far as will it work, don't know, I have never tried it. I have seen depression era doodlebug tractors made from old cars and trucks. To get the gears low enough they sometimes hooked 2 transmissions up in line. Same idea just going the other way with the ratios. I can't think of anything that would stop it from lubing. The only concern I would have is the torque being too much for the second transmission.

[cayoterun]

Thanks, Crew.
The "Brownie" is from a Ford truck, (Spicer 5831D). On the 6066 guy's website is a good break down on these.
I agree the "brownie" could be the weak spot. Sure have to keep a soft throttle and clutch.
If my guessing is right by doubling the driveshaft rpm into the rearend, it should be the same as having 2.05 rearend gears. If I'm wrong, someone correct me.
By using those ratios in the computor calculator, it shows 62mph@1600rpm, 5th gear. That's great for the old motor. 93mph@2400, plenty and more that I want or need. Middle ranges fit ok too. If needed for slow speeds, drop the brownie in direct.
Maybe, we're gaining on the driveline deal, I hope.

Thanks to all for the help.
Cayoterun

[89 crew]

I looked up 6066 guy's site. The main concern I have is the fact the the gears are pulling backwards. They are not designed to handle stress in that direction of rotation. It may work great forever, or it may blow up immediately. personally I don't know. If you don't care, I would say, go for it and see if it works. In reality the absolute worst I would expect would be a break in the case allowing the gears to bypass. If it is a steel case then I would only expect a crack at the worst.

[89 crew]

I talked with my dad about this today, He used to be a transmission man for Gm dealership back in the late 50' early 60's. He said where the teeth are beveled on the back edge it won't work. He said with little to no stress, it will still grind the teeth off of the gears. If you find the same gearbox with straight teeth on both sides of the gears it will work.

[cayoterun]

Thanks for your trouble, and thank your dad. I have no idea how old the gear box is, so when we get closer to putting it in, I'll pull the top off and look. Your dad may be familiar with this specific gear box and knows what's in there.
Even if we run it like it's built, we can use the .85 over (high) and change ring gear and pinion.
I'll keep looking for a 5th over tranny in the mean time. I've still got a long ways to go. I need to use the KISS (keepitsimplestupid) method as much as I can.
I'm about ready to sit the motor in the frame, tho.
Thanks,
Cayoterun

[cayoterun]

We're never to old to learn. Never gave any thought to helical (beveled) gears, thrusts factors, etc. 'til this came up.

I pulled the top off this "brownie, and it has the helical gears and I can see where the thrust could create a problem.

Crew, would your dad, or anyone else, happen to remember approx. when they changed from the old straight gear design to the helical? I'll bet it was mid-50s or before.

There's a chance I might find one here in a farmers junkpile.

I'm getting anxious to start bolting some of this pile of parts together, but want to get motor and some kind of driveline in the frame before starting to cover it all up.
Thanks,
Cayoterun

[89 crew]

I asked for ya. He said they have both types of gears still today. The straight tooth gears are typically used on lower hp applications. Basically you are going to have to either know what you are shopping for, or open each one till you find it. He can't remember a model number of intermediate tranny with straight teeth (but he knows it was made).

[cayoterun]

I know of a couple around here, so will check them out.
If I don't find something in the next month or so, I may gamble on using this one. Probably never drive this thing other than short joy rides, parades, and on and off a trailer.

"Balaur" has been alot of fun so far. The old guys around here talk about them like they were a favorite old horse. When I tell them what I'm trying to do, they just light up and start offering parts, ideas, and support. They want to see one of the old brutes shown around.

Who said old wore out farmers can't have fun?

Thanks to you and your dad.
Cayoterun

[89 crew]

Not a problem, Let me know if I can dig up any more info for you.