Three-stick W900?

[Vigilant]

Rumor has it he is moving on to his true calling in life: Rocket science.

 

[Freightrain]

Let him step into MY truck and see how quickly he can throw three "real" levers around. Not some air switches....

 

[Scrub Puller]

Yair . . . Freightrain LOL. Orright, tell us the story.

I drove a three stick Pete oilfield truck with a 6-71 for a while, the third stick was just a hi/low joey box, rarely used it . . . looked good though.

Cheers.

 

[Scrub Puller]

Yair . . . I screwed up #23 post came up twice

Cheers

 

[Vigilant]

Let him step into MY truck and see how quickly he can throw three "real" levers around. Not some air switches....

A brownie and a brownie? My head hurts.

VERY nice truck.

 

[mike in idaho]

The boss has one of those setups in an old B Model dumptruck, a three speed, a five speed and a two speed with a fourth lever on the right for the dump box.

 

[Oxbow]

I learned on a 70 Peterbilt with 8V71 and 5x4. Throughout my life I have driven 4X4, 5X3, 10X3 (10 speed with 3 speed brownie behind it, a gear for every purpose - but a lot of overlap) and a 4x4 airshift spicer. The last was not at all forgiving, and I didn't drive it enough to ever become smooth with it. I don't think they are made anymore, perhaps that's why.

My lowboy tractor is a former logging truck. 89 Pete 378, 425 3406B, Jakes, retarder, 18 speed, 2 speed rear ends. Works pretty good for what we do. I NEVER shift the 2 speed rear ends while moving, just use them if I know I will be climbing a mountain road and don't need to go over 45 mph. Seems like things could tear up quickly if both rears did'nt shift at exactly the same time. This is the first 2 speed rear end set up I have been in, so maybe they can be shifted while moving, but I scared (and not wealthy enough) to try.

Anyone have experience with two speed rears?

 

[Freightrain]

A brownie and a brownie? My head hurts.

VERY nice truck.

Thanks. Just a lil '59 B61. It started as a Triplex(5x3), but when I stretched the frame I needed a carrier bearing. Instead I stuck a 4spd Spicer in it. Gives me a 5x3x4. Actually the 4spd runs in direct for the most time. The splits are about the same as the Mack compound, so I don't really use it on the road. Gives me nice slow speed for backing and really LONGGGGG legs on the highway(85 mph in double OD).

Here is the write up from my project, which includes stretching, adding air ride, bunk, and brownie.


http://www.bigmacktrucks.com/index.php?/topic/16282-adding-air-ridestretching-frame/?hl=+air++ride

 

[Oxbow]

Fun looking project! You should also be able to back up at 50 mph! Hang on -

 

[Andrew_D]

Anyone have experience with two speed rears?

Lots of farm trucks around here used to have 5 speed transmissions with 2 speed rear axles. Not too many in use any more...they've been replaced by ex-highway trucks.

Andrew

 

[Blmreject]

I learned in a 69 Kenny with a 6x4 and a deep reduction. You had to go into 2nd then over and up for first on the 6 speed. With the deep in, you could feel each tooth on each gear when you pulled on the shifter. All you had to do was tug it into second with the clutch out and it would just start chugging along. In first the throtle wouldn't make you speed up, it just made more noise.

That was a real truck, not an air switch, pavement pounder, wanna be.

It's funny, I've never seen any one who could really drive a truck, i mean make a truck do anything, that thought of them self as a truck driver.

 

[mitch504]

It's funny, I've never seen any one who could really drive a truck, i mean make a truck do anything, that thought of them self as a truck driver.

I've seen a few, but more often than not, you're right.

 

[Dualie]

i have seen a few but they are very few and far between.

 

[Jumbo]

Anyone have experience with two speed rears?[/QUOTE]

Yes, and all bad, when I tried to use them as instructed.

I never tore up a rear end, but that was all luck and the realization that I should just leave it in low range all the time. I just quit when I was ahead. Again, all luck and no skill.

 

[Vigilant]

I have never ran a set of deep reduction rears, but was under the impression that they should only be shifted when the truck is sitting still.

 

[busy dad]

The only reason i know of for shifting out of a gear to split is on the early 9513 fuller series you had to break torque with the clutch to split the top gears or they could kick into neutral.. The later boxes you just pre-select and lift off the fuel.. We had both styles and often had to go out and re- train drivers to shift properly the old boxes..

 

[mike in idaho]

Two speed rears aren't that common around here any more. With the broader operating range of the newer engines and the 18 speed transmission, you just don't need all those extra gears. A two-speed rear end is more money to fix than a single speed and it's easier for some wannabe truck driver to tear up. They're actually tougher, in rough going, if you leave them in high range. High range locks out the reduction gearset in the center of the carrier, it's harder to hurt the parts then.

 

[Blmreject]

It was years ago now, but if i remember correctly the deep reduction in that Kenny was in the 6 speed. I know it shifted different in deep. There was no neutral between 1st and 2nd. You just pulled the shifter and you were in a different gear, not that you could tell.

It had 48 forward gears and 9 reverse. There was lots of over lap thought.

 

[mike in idaho]

I drove a 6 speed/4 speed progressive setup for several years, it was one of my favorite trucks to drive. It was a pretty good reach from the 1st- reverse slot over to the 5th-6th slot so the brownie stick was located between the seats, behind the main box. Real easy to drive and easy to work on too, you could change the clutch in less than a day.

 

[JDOFMEMI]

My lowboy tractor is a former logging truck. 89 Pete 378, 425 3406B, Jakes, retarder, 18 speed, 2 speed rear ends. Works pretty good for what we do. I NEVER shift the 2 speed rear ends while moving, just use them if I know I will be climbing a mountain road and don't need to go over 45 mph. Seems like things could tear up quickly if both rears did'nt shift at exactly the same time. This is the first 2 speed rear end set up I have been in, so maybe they can be shifted while moving, but I scared (and not wealthy enough) to try.

Anyone have experience with two speed rears?

I run a lowboy with an 18 sp and 2 sp rears. Once the hired driver broke the front rear end by shifting the rears under load and while the power divider was locked. Don't do that. I have never had a problem shifting them while moving, but prefer to shift them while on relatively flat ground, and not while under a hard pull. Normally I shift them to low before going on steep mountain roads, and go back to high when I get back to good roads. As long as the power divider is not locked, it allows for a momentary differential in speed if one rear end shifts before the other. If it is locked, then you are inviting trouble. When the hired driver did it, he was going down a 22% grade with a D-9N on back. He should have shifted before the hill, or left it alone.