Factory gear Tacoma TRD Off road 18.. V6 Automatic trasmision

Hey my friends,

I got a new Tacoma TRD off road 18.. it was already lifted 3” and tires 285/55R20.. looks awesome BUT.... mileage sucks really bad.. I guy told me that I just need to change the gear ratio on my truck.. I do t know to much about it.. I think my truck is coming with 3.91 and my friend told me to increase it to 4.56.. should this help me with GPM and power?

Thanks

 

It may help SOME but not that much. Your MPG will continue to suck. Welcome to truck life.

 

Gears won’t really help MPG in a gas truck, but that will depend on how you drive. But it will help acceleration and keeping the truck in the right gear. 285/55 20 is 32.8”, stock is 30.6” so that’s sizable difference.

Edited post. so I don't confuse others with bad info.

 

I have been reading a lot about it and your opinion is similar from another sources. The original tires are 265/70r16 so the difference is 30.6” (old) and 32.3” (new). I just feel that truck need more power because it feels heavy..

 

It is, 4500lbs and bigger tires make it worse. The smaller stock size tires are often harder compound and great for highway mpg. But with larger tires and agressive softer tread, mpg takes a good hit. Like others said, regearing isn’t going to improve your mpg.

Smaller stock tires, stock weight (no heavy mods) and non aggressive driving will get you the best mpg

 

Thank guys!! I think I will keep it for now like that..

Best regards!!

 

4.56 gears are not currently available, you can get 4.88 gears.

 

Stock tires are 30.x”. So yes, that’s a huge difference going from 31” to 33’s.

 

I spent the money to re-gear mine to 488’s. Not sure if these other guys have so I’m just speaking from my own experience. My gas mileage went up by 4 mpg. My elevation here is 4500+. Lots of hills and mountains. So that greatly affected my mileage. To each his own. Without re-gearing this truck I would have sold it.

 

I’m not sure yet if my Tacoma has 3.91 or 4.30.. looks like is 3.91.. so, if I decide do it, you recomend me go with 4.88?



Mine is V6 Automatic transmisión

 

You have the 3.90

 

Get the 4.88s. lots of guys are super happy with them. Fyi with 4.88s and 33" tires your final drive ratio is still a little less than a stock manual transmission, but still way better than a stock Automatic.

Fyi you can get 4.56 gears if you want to, and it will feel similar to stock. But only if you have a sport. The OR has a larger rear diff (with the e-locker), and you can only get 4:30, 4.88 or 5.29's.

 

WHY THE FUCK DOES THE 4CYL GET A 4:30 RATIO.

The V6 is just as anemic under 3000rpm.

 

And the 2.7L MT gets the 3.91? Seems like it should have been 4.30 for all engines and transmissions.

 

I think that's cause it's a 5spd though

 

A regear should help with mileage because the engine is being lugged by the larger tires and effective reduced gearing. Just because the engine is operating at a lower RPM does not mean better fuel mileage. It has to work harder. Read up on a regear.

 

You right. Not sure why I though 31.5, it's 30.6

 

None of you are recommending 5.29’s. Is there a reason for that?

 

I currently have 488’s. I very seldom drive on freeway. Id definitely go with 529’s if I had to do it again. My tires are 285’s

 

If you are thinking about it, take some time and read this whole thread before you throw down the money. https://www.tacomaworld.com/threads/the-4-88-mega-thread.511967/