Larger Tires and gear ratios

[Bradly640]

Hello, Im new to the forum and have already found a lot of useful info here. First, I have just purchased an 05 limited 4.7 V8. My question is about gear ratios after a lift and bigger tires. What kind of work are we talking about after a spacer lift in re-gearing? How did others here tackle this problem? How has gas mileage been effected?
Any info would be appreciated. Thanks in advance.
Brady

 

[rook]

welcome! you really don't need to re gear unless you are going with tires 35" or greater. I have 33" and have no problems in town or on long hills.

4.56 is the ratio needed for your 5 speed if you plan on running 35's. and you won't want to run that size with a spacer lift. it takes some work to fit 35's. stock final drive ratio is 3.73 it is pretty versatile.

 

[Bradly640]

welcome! you really don't need to re gear unless you are going with tires 35" or greater. I have 33" and have no problems in town or on long hills.

4.56 is the ratio needed for your 5 speed if you plan on running 35's. and you won't want to run that size with a spacer lift. it takes some work to fit 35's. stock final drive ratio is 3.73 it is pretty versatile.

Thanks, that info helps a lot. I went to a local shop and they were telling me I would have to re-gear with even a 1" change in tire size.

 

[DaBoostCreep]

Thanks, that info helps a lot. I went to a local shop and they were telling me I would have to re-gear with even a 1" change in tire size.

And of course they would do the labor right? CHA CHING!

 

[rook]

Thanks, that info helps a lot. I went to a local shop and they were telling me I would have to re-gear with even a 1" change in tire size.

to the man with a hammer, everything looks like a nail..

money grubbing buzzards :bash:

 

[berettashot117]

bump. im pretty intersted in knowing all the steps for re-gearing. costs, benifits, things like that

 

[bt216]

I think 4.88's are better for 35's

 

[galactic_04]

Just keep in mind the higher the ratio the thinner the ring gear gets making breaking them easier. Doubt you'd have a problem unless you went pretty serious on your off-roading, but it's possible.

Also, regearing means resetting all the axle hardware (shimming of gears, etc.) once you do it. It'll probably cost you $1000 to do it.

 

[Jed]

Thanks, that info helps a lot. I went to a local shop and they were telling me I would have to re-gear with even a 1" change in tire size.

No way....your 4Runner wouldn't even break a sweat going up 1".

 

[daPitbull]

Maybe for a V6...I've got 456 on my V8 and it's perfect. IMO 488 your runner would be screaming on the freeway.

I think 4.88's are better for 35's

Re-gearing will cost anywhere from $900 to $1200. Depends where you go and if you re-use bearings, etc.