The Truth About Gearing

Gear and diff ratios can be confusing, so here's a closer look.

[Zecrid.]

It doesn't matter if they use ft pounds or newton meters. They could have used 100 door knobs of force and it'd be the same concept.

[WarriorsPhoto]

I’ve never heard this explained so simply. Thank you 😊 🙏 .

[jimhenry]

I owned a vehicle armoring business and worked Dubai.
We found we could gain more horse power, in this case translate, moving mass quicker and less costly by lowering gearing than exhaust, air intakes, cams, and other superficial add ins.
Even though we also did many of the engine tweaks when clients would pay for it.
I am ordering a new Bronco and buying it with the lowest gearing possible.
Low gearing term equals high gear ratio, ie 4:11 gear is preferable for pulling power, 3:56 gears is great for low engine rpm's at highway speeds.
That's how I always made the distinction.

[midnoob]

guys, it's not about having a certain speed or torque number or conversion, but about understanding how it evolve with gears settings. For instance if you gain speed in mile per hour, you also gain speed in kilometers per hour, point being that changing LB.FT into nm isn't important to explain gear ratio work

[LA_Commander]

I had 3.55 open gears on my Explorer with 4.6L V8 and they were ok at highway speeds but low end power suffered. I drive in the mountains a lot and frequently haul stuff, so I switched to 4.10 gears and added a limited slip differential. It helped a lot going up and down the mountains, I have more power going up, and more engine braking going down. The engine and transmission do not work as hard because the rear end is doing more of the work. Gas mileage you might ask? Well at 70 mph my tach says about 2300. Not bad at all. I just slow down on the highway and do about 60-65 mph now. I noticed barely 1 MPG lower than before. I used to get about 20-21 on the highway now I get 19-20. Barely any difference at all. With an overdrive gear, you are safe when driving on the highway with deeper rear end gears. On heavier cars or trucks with automatic transmissions, you need more gear in the back.

[Texasmule]

To anyone wondering, yes 4.00 and above with a engine that has about 350lbft of torque will do burnouts and if the motor has above 600lbft that's when you get tall wheelies.i know this because I have a gasser and I've been through it all

[LeBeckStudio]

So you just said that my Honda actually has some torque?

[jcmartinez]

4.10s on my 2013 Mustang GT (manual) and topped out at 115mph in 4th gear at 7500rpm on 28" slicks. So I will gear down to 3.73s and that will increase the top speed in 4th at 7500rpm to around 130mph. Which will let me get into the 11s in 4th gear.

[LionsTigersBears]

Tire size stall convertor and the transmission ratio all is what gels everything together to work like lightening.

[cyrusvirus]

i have a 3.36 rear end and a 2004R trans with a fourth gear of .67. once lock-up engages and going up hill, my engine lugs and i’d have to downshift to third. my wheel/tire is 26” tall. i’d like to swap for a 3.55 but for now down shifting will do.

[SquireDAF]

They could have said it produced 100 duck farts, the video wasn't explaining what torque is, just how gears worked and just how much it increase the power at the wheel

[michaelszczys]

In a video primarily about final drive gear ratios why do they keep showing the spider gears and even show what appears to be someone welding them solid?
Back in the jacked-up four wheel drive craze days back in 1970s I used to get a kick out of watching guys take a truck with about 3 to 1 Street gear ratios and put tires twice the diameter of the stock tires and then destroy innumerable sets of universal joints as the huge tires made their final drive ratio more like 1.50 to 1 and when they ran it in the transfer case low range ( because they had to all the time ) it put all kinds of torque stress on the drive shaft.
Same with brakes, I loved it when they would put monster tall tires on an axle with little car size brakes and wonder why they can't stop without blowing the hydraulic lines off.
Haa ha ha

[dirtyfabrication]

I love the Lincoln locker being installed lol

[suzukisamuraicayrmanyaklar]

My differential ratio is 3.9 at a speed of 100km, showing 3000rpm. If I change this to 5.12 differential ratio, my rev counter will show approx.

[gilbertmurrell]

I think 3'73, is a Great gear for prrformance and Street.. I ran around. (Locally) a Few Years back, with a 55 Chevy, with 5'38 gears, then later, a 68 Camaro, with 5'38 gears! Both engines were built, and the cars, were very quick.. NOT A TRIP TAKING GEAR, for certain! I am building another 68 Camaro NOW.. IT has a CERTIFIED 400 HP 350 (Built by Mike Saye) with 4'56 gears.. STILL: Not a Gear, for LONG TRIPS!! ;)

[moazdaza]

so just a question that I am researching...

if I lowered my final drive ratio from (idk how much it is right now) to a lower value /ratio it will allow me to cruise quiter in my car and have a higher top speed for the autobahn? but it will hurt my acceleration? did I get it correctly?

if yes..

then if I do lower the final drive ratio to get a quiter car for long distances but then do few upgrades to the engine to increase HP / torque will I then be restoring the lost acceleration time (0 to 60) and still I would have a quiter car for traveling? (because my car right now is too noisy even at 50/60 mph the rpm would be at like 4/4.5k rpm...

[ShirleyVanWyk-dmtn]

2:46 concept applies to the KOENIGSEGG REGERA if i'm right. I think i'm starting to grasp gear ratios

[obedbeltran]

I have a 5.3 2002 single cab. Chevy 1500 with 3.73 should i swap to 4:10. The most i drive on high is 2 hours for truck meets at 75-80 mph will it affect my vehicle? Help!!!! Advise needed!!

[toyotakp-channel]

1:58 got to love this KE and this amazing torquey 3TC engine

[thecarse]

only problem with the video is he mentioned overdrive with classics and not that most classic cars didn’t have overdrive