Tacoma 2.7l 4lo torque

Hello, I have a 2008 toyota tacoma single cab 4x4 and I would like to know how much does your torque increase when your 4low is engaged? i have heard it doubles but that would mean a torque of about 300 ft-lbs is that right?

 

Well I believe the transfer case 4lo is 2.57:1...
So 190ftlbs is 488.3ftlbs output.

 

Ok I've had this question as well but I have a 3.4
I believe these things will affect your torque multiplication
tranny ratio
Transfer case ratio
Diff Ratio
Tire Size

 

It's more complicated than a simple what's my number.

It depends on what gear your in, what your transfer case ratio is in 4Lo, what your axle ratio is, and what tire size you're running.

So let's say you're running the OEM 245/75-16.

Your best case scenario for max tq output is keeping the truck in 1st gear, in 4Lo.

The trans you have, 1st gear is 3.95:1. The transfer case is 2.57:1. The rear axle should be 4.10:1. You multiply all the first numbers together and get a final drive ratio of 41.62:1. You then take the torque at the flywheel which is 180 ft-lbs, multiply this by the final drive ratio which was 41.62:1, which gives you 7491.6 ft-lbs, then divide it over the total number of wheels that the power is being sent to. Let's assume the truck is stock so 1 front tire and one rear tire and you have 3745.8 ft-lbs at each tire.

All this being said, you'll never see that at the tires because you'll get power loss from the flywheel to each tire due to energy transfer.

A rule of thumb is you lose 20-30% of your power from the flywheel to the drive wheels. That being said you most likely have 2622 to 2996 ft-lbs to each tire.

Go to a taller tire, you're going to have even more of a loss.

Hope this cleared up your question.

EDIT: Forgot to mention typically having a manual transmission will give you better final numbers. You get less power loss than having an automatic.

 

you also have to remember in an auto you get torque multiplication via the torque converter.

auto ftmfw!

 

Touché! I think I'm fairly freaking intelligent when it comes to how each part in a vehicle works but torque converters always stump me. I've only ever bought trucks that were manual. Can you explain?

 

My popcorn has gone stale...
Thanks Arsen for that quick lesson

 

thank you guys for your responses!, im still a bit confused tho, because based on the number you provided that seem like a lot of torque, were you just using those number as examples or are they actual values for a toyota tacoma?

 

^^^ this is correct

 

Those are real values that I used. The numbers do look large, but honestly that is not that much. Compare that to a 1 ton diesel truck and you'd think we were driving go-carts.