this post was submitted on 08 Jun 2025
92 points (91.1% liked)
Cars - For Car Enthusiasts
4499 readers
66 users here now
About Community
c/Cars is the largest automotive enthusiast community on Lemmy and the fediverse. We're your central hub for vehicle-related discussion, industry news, reviews, projects, DIY guides, advice, stories, and more.
Rules
- Stay respectful to the community, hold civil discussions, even when others hold opinions that may differ from yours.
- This is not an NSFW community, and any such content will not be tolerated.
- Policy, not politics! Policy discussions revolve around the concept; political discussions revolve around the individual, party, association, etc. We only allow POLICY discussions and political discussions should go to c/politics.
- Must be related to cars, anything that does not have connection to cars will be considered spam/irrelevant and is subject to removal.
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
for a moment i thought this was loss
Also is this for real? Never looked into truck transmissions or even just thought about them in general.
The real shift patterns are like this:
They look complicated but it's not too bad when you get used to the idea. In normal use it's basically a four speed H pattern with two different ways to increase the number of gears. You have a range selector to give you 8 main gears (you shift 1 through four in low range then flip to high range and move back to 1 position to give 5 through 8) and then you have a splitter that gives every gear a high and low ratio (in order you'd go 1st low -> 1st high -> 2nd low -> 2nd high -> etc). Normally you don't need to use all the gears so you can skip some of the sequence - particularly when lightly loaded. Lo position is a particularly low ratio, and reverse is as per normal except you can split it to have a somewhat faster or slower reverse gear.
I'll admit I haven't driven a full 18 speed but I've driven 9 speeds with a range selector and a 10 speed with a splitter and both were easy enough to learn so combining the two doesn't seem as daunting as it might be to those who haven't tried either.
I couldn't get the double clutching timing right, and my instructor was a cunt who got on my nerves the whole day of training. Also because they're a gated gearbox, you're supposed to follow the H pattern and not cut desire paths.
@SaneMartigan @gnu
I was brought up on track driving and old 911s — they demand a certain driving style: rev-matching, always keeping the revs up. That eliminated the need for double clutching.
In Australia, you've got to show double clutching to pass the non-synchronised driving test.
@SaneMartigan
Impressive — unsynchronized gearboxes are no longer manufactured, in the EU will it soon be nearly impossible to get a driver’s license for a manual transmission.
I need to reallocate 🙏
They're going out of fashion here too but it means there's a heap of cheap old trucks available. With our housing cost issues, I've been daydreaming about building a house-truck of sorts.