Tim
U.S.Constitution
A Mack triplex either had 2 or 3 sticks. No air shifters or air splitters.
Big Truck Transmissions
- Thread starter Rigjockey
- Start date
A Mack triplex either had 2 or 3 sticks. No air shifters or air splitters.
passingtrucker
Active Member
THANK YOU for mentioning "twin stick" trannies. I went through all the postings and felt like an extinct dinosaur that no one had mentioned twin sticks, which is the first tranny I drove when I first got my CDL in 1985. Here's a YouTube video of the same make, model, & tranny I drove. Sure brought back good memories watching this Mack video. I was told the Mack I was issued had already gone through four in-frame engine re-hauls. For newbies who are not familiar with engine rebuilding, an in-frame re-haul is removing and replacing the pistons' oil and compression rings, connecting rod bearings, and doing a complete head valve rebuild without removing the engine block.
From a business management perspective, some companies are experimenting with automatic transmission to evaluate if there's less driver turnover, versus trucks with manual transmissions. Automatic transmissions often produce lower mpg and higher fuel cost. But when you factor the cost of hiring and training new drivers and the risk factor of newbies (assigned with driver trainers for the first few weeks) versus retaining experienced drivers with better safety records, then the lower mpg and higher fuel cost becomes part of the "damage control" cost of improved safety record, less payouts from chargeable accidents, and retaining customer loyalty. When customers are informed "…your shipment will be late and there's possible damage" because of a truck accident, clients often call another company to haul their future shipments; unless you offer huge discounts for their next shipment to retain their business. This discount means either no profit, a slight lost, or hauling the load for free, which giant carriers like JB Hunt, Schneider, and Swift can easily afford to give away.
Copperhead
Well-Known Member
I had a 13 in my last truck and now have an 18 in the current one. Generally, I have not been a fan of the auto shift trans. I did get the opportunity to try a couple of them and wasn't sold. Now, to muddy the waters... Allison has come out with the new TC 10 TS true automatic transmission. Previously, a full automatic was not very efficient. I have seen some of the test numbers with Allison's latest offering, and it competes very favorably with Volvo iShift, Eaton Ultrashift, etc. In some ways, it is better. After seeing some videos on the Allison, and seeing the test results, I am a little interested in giving the Allison some serious consideration next go around. Mack and Navistar are offering the TC10 TS transmission now. Not sure if the others will jump on board.
Southern Fried
Well-Known Member
I just returned from a trip to Chi town with a VolvaMack equipped with an Ishi(f)t Transmission. The POS when left in the D position refused to downshift lower than #3 unless done manually. In D it upshifts from 3 to 6 or 7, then 10, then 12. With a liquid load this causes a hellacious "surge" that slams back and forth.... shocking hell out of the rest of the drivetrain. We currently have 5 of these down for rearend damage. Wonder why???
Yeah, I know.... shift in Manual mode..... so what would be the "advantage" for an "automatic" if you have to manual shift anyhow??? Other than the "kickback" to the purchasing dept I mean.
Yeah, I know.... shift in Manual mode..... so what would be the "advantage" for an "automatic" if you have to manual shift anyhow??? Other than the "kickback" to the purchasing dept I mean.
NO company can afford to give away services for free.
If you're learning this
in your college classes, you're being ripped off.
Fageol
Old acid hauler but not too caustic
Really liked the old 4 speed brownies with the deep under. One could generally save (downshifting) a whole hole with one of those (deep under gears). But it's hard to knock the 18-speeds. Sometimes one can save going into the basement if one uses the lowest gear possible (possible as opposed to indicated) in the high range. But if one has to downshift out of that hole, generally one has to drop at least two gears (or splits or whatever they're called in 18-speed-speak). Wonder if I could still do the old through the steering wheel trick of picking up second over from third under when climbing -- probably not, too old.
Southern Fried
Well-Known Member
Ok.... hold the phone. That right there is exactly the kind of worthless, mind numbing BULL CRAP that is causing so much needless waste and anguish in today's workplace. Not you Passing.... the crap you're being taught. Thank you for actually putting it here in print.
There is so much wrong in that statement that it's unbelievable that anyone with a functioning brain would take it seriously, let alone try to implement it in reality. Yet, because some dildo University professor mouths it, it's considered wisdom and they do.
It goes to prove that today's "higher learning" is total garbage..... a waste of time and money. These crapholes should be sued out of existence by every "student" who has been force-fed this pablum in the guise of "education".
Drivers have been required to have a CDL in order to drive certain CMVs since April 1, 1992.
Rigjockey
In Gord we trust!
I always thought the 9 and 10 where pretty good, Untill I started on the 13's and 18's. more options.
SaddleTramp
Well-Known Member
My first run on the new 18 spd. put in this past Fri. Nursed the stripped out one 200 miles to our shop in 7th. High.. 50mph on I-40. Had to drop the 44,000lbs., at the Wilco Gordonsville,TN and bobtail it. That's my kind of Truckin!!! Lol never saw a "full grown"
put a poll on craigslist im sure youll get plenty of replies
prefers a manual
Rigjockey
In Gord we trust!
IMO. The Volvo auto trans has got it going on! It does not roll back on a hill when you let off the brake. I was stuck on ice and snow at a customers and thought i was euchred. I flip diff lock switch, The I shift allows you you grab a higher gear. I did that and it just walked its self right out of there.
A long way from the auto shifts from say, 10 years ago.
A long way from the auto shifts from say, 10 years ago.
Fageol
Old acid hauler but not too caustic
You realize that Injun reads some of these posts. I'd sooner walk through hell with gasoline shorts than fess up, where the Injun could hear (or read) it, that I was shiftless. Although she probably already does, she's gonna pwn you, staff or no staff.
Rigjockey
In Gord we trust!
I aint skeered! Injun is my friend.
Fageol
Old acid hauler but not too caustic
The friendship you claim with the Injun reminds me of the old expression, "Hold your friends close and your enemies closer." Didn't the Lone Ranger claim that Tonto was his friend? Didn't that warm and fuzzy feeling change when the Lone Ranger discovered the meaning of the word "Kemosabe"?
Duck
Sarcastic remark goes here
We need to cross paths on the road somewhere so I can stand there & point & laugh at you & call you names.
Really though, ... that's pretty brave of you to come out of the closet like that.
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