Truck auxilary transmissions older trucks.

Big truck or little truck?

I've got a 1982 1/2 ton diesel Chevy Blazer with a Ranger Gear-Splitter aux. It goes in front of the four-speed transmission. They come in 17% underdrive, or 27% overdrive and work with 2WD or 4WD. Mine is coupled to a cast-iron four speed trans, SM465.

They make them to fit many Chevy, Ford and Land Cruiser apps.
 
All I'll say is that my tandem with 13-spd RoadRanger is a LOT easier to drive than my neighbor's tandem with a 4 + 4 transmission setup.
 
Built a mobile home toter truck for a guy.Old Dodge-Had a 413 gas engine -5 speed trans-3 speed aux and a 2 speed rear axle. 30 forewards and 6 reverses. He said it was a great truck but you had to keep your mind on driving it or you would forget what gear you had it in.
 
only truck drivin job i ever had other than a wrecker was hauling sand with a old Ford tandem...it had 5 gear main and 4 auxilliary and a 2 speed rear...useta hook my arm in steering wheel and shift with both hands...that truck was a handfull to keep on the road...my boss had a new LT9000 i think with a 13 speed stick in it...i drove it a couple times when my truck was broke down...took some gettin use to but it had a/c so i suffered lol
 
Company I used to work for had a 2070 International with a 238 Detroit,13 speed with a 4 speed aux and 3 speed rear. If you started out in lo-lo-lo-first in the morning and wanted to hit all the gears, you might make one run through all the gears by quitting time.
 
Rode with a guy in a gravel hack back in the 60's- a main, Brownie, and 2 speed rear. Watching him shift was like watching a magic show- he could shift 2 or 3 times in the time it would take me to shift once. He said you had to figure out the sequence that kept you in the power range (didn't use every gear of every transmission)- but he had it down pat, and could carry on a good conversation while his hand darted around. Engines were mostly underpowered in those days, and combine that with bad (or no) synchros, and it was a real art to keeping them moving.

He had a different sequence, of course, for running empty- lots less shifting.
 
Forgot to mention- I asked the guy if he ever got tired of shifting all those gears- he said "When I do, I just think of rain and a #2 shovel, and it gets better real quick."
 
I have 3 old trucks that are the twin stick type/aux transmissions in them plus one Aux transmission laying out of a truck. All of them are 4 speeds and I think but can not be sure but I think they are all an over drive in 4th gear at a 1.5 to 1 give or take a little bit. I have 2 that are extras. I plan to use 2 but having 4 that leaves me with 2 I probably will not need
 
This one has two aux. transmissions stuck into it. I guess the guy had to really slow it down after adding those track extensions.

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Jd i have seen this before on oc3 and hg in the old days it was a model A transmission. Of course a modle a engine and tranny was once the universal answer!!!
 
Like to see the younger guys now trying to figure out how to run the old Du plex, the tri plex, and the quadro plex, Last big truck I drove had an 8 speed overdrive and the last smaller truck (F650 straight 6 speed.

yes in earlier years ya had to be half octopus with a good memory on the longest hills.--- one oopps and ya loose a bunch of gears.

if it be down hill ya better have an extra roll of toilet paper cause mostly with no Jake brake ya had almost nothing.

Anyone remember the air assist steering too ? they were fun in frozen strip jobs.
 
Looks like a Cletrac HG or OC3. You could get a ford model A tranny for them that filled in as an Aux tranny. Zimmermans in PA could probably tell you all about them
 
when i worked at the Galveston airport there was a old aircraft wrecker in one of the hangars from back when it was still an Army airfield...cant recall brand of truck but it had a inline 12 cyl gas Allison engine...never did figure out how many gears it had but we got it in lowest possible I THINK and you could literally get out...walk back in the shop...eat a snack...go to the latrine and get back on board before it hit anything...also had twin Tulsa 80 ton pto winches on the back...i left that job in '75...havent seen ol truck since...i went by there last year to look at storm damage from Ike and hangar had been replaced with a hotel before storm...not sure what i woulda done with it but i always wanted that truck.
 
Yes, I've got one on an HG. It was an Oliver option, made by Trasco - and it used a Ford A car transmission.

In the photo, the first trans (closest to the engine is a Model A trans.). But, not the 2nd.
 
yeah they weren't worth a dang for const. work was always loseing air press cause you had to trun so much some of them sounded like a hood full of snakes hiss hiss, hiss, hiss hiss.
 
Something I was always curious about.

Let's say you had a 5 speed main and a 4 speed aux. (we'll stick with a single speed rear for now) We'll also assume that 1st in both trans is NOT a granny/low reduction gear.

Assuming the truck is loaded to the hilt and you need every gear, what would be the shift sequence?

Front/Rear

1/1
2/1
3/1
4/1
5/1

and then

1/2
2/2

etc?
 
I have three autocars a b83 mack and a r model all of them have 5an4 in them.can drive them better than the new ones.now were building a 49 sterling with a 275 cummins gonna put a 5an4 in it.also got a 72 autocar with a 600 cat and a 6an4 with a set of brown&lipe 3 speed rears.Now that one will make u think.I love them thats all i was raised on.
 
Yes, look closely at the photo. The HG and OC3 originally did not have any separate transmission anywhere. just a three-speed Clark transaxle in back. The setup in the photo has two car transmissions bolted together and none are original. The one that's bolted to the bell-housing is clearly a Ford Model A - but not the second one. The second might be a Warner T series.
 
I've got a '78 Ford F-600 service truck..Came with a 4 speed and single speed rear with 6:88 gears..[City of Cleveland truck] ..I installed a Spicer 3 speed auxiliary transmission..Helped out with road speed on the big roads and under-drive worked great for crawling onto a "mud boat" at the gas wells..
 
(quoted from post at 19:27:31 12/06/10) Something I was always curious about.

Let's say you had a 5 speed main and a 4 speed aux. (we'll stick with a single speed rear for now) We'll also assume that 1st in both trans is NOT a granny/low reduction gear.

Assuming the truck is loaded to the hilt and you need every gear, what would be the shift sequence?

Front/Rear

1/1
2/1
3/1
4/1
5/1

and then

1/2
2/2

etc?


Been alot of years since I drove a 72 Chev 427 with a 5x4.

Normal sequence loaded was something like this::::

Main / Aux

1/2
2/2
2/3
2/4
3/2
3/3
3/4
4/2
4/3
4/4
5/3
5/4
 
Back in about 1985 dad blew up the 360 in his 1974 Dodge pickup. Between him and the neighbors parts they came up with a Ford 300 straight six and put a diesel head on it. they modified everything to put this in the pickup with a 5 speed behind it and a 3 speed behind that. The 3 speed was only set up to run a high-low. Since in that year the transfer cases were not yet married to the transmission they rebuilt all three drive shafts, one to the rear axle, one to the front axle, and one between the trans and the transfer case. The old truck had 4-10 gears in the axle and would top out at about 65 but the low gear you didn't have to worry about dropping the clutch!
 
we always did the main in 2nd then 1234 with the aux. then put the main in 3rd AND aux back to 1 at the same time need two hands. then 234 on aux then main to 4th and aux back to 1 at the same time then 234 with aux. well you can see where this is going most times in pa. you come to a hill at this point and have to it start over when we went down hill we just used the main 5 speed. maybee used 3 and 4 in the aux.
 
Forgot To tell you if you were running a detroit you had to slam your thum in the door fore you got in, so's you would bee P=O and push that pedal right into the bummper.
 
In the late '80s I drove a rubbish truck for a friend for three days so that he could go on vacation and his sons could get the routes done without him. He had R model Macks with 5+ 2 with reverse in the auxiliary. The auxiliary made it possible to start and stop without the clutch. My left knee never would have made it the second day at 250 stops per day!
 

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