gear ratio for 33s

[CreepyCrawler]

what would be the adequate ratio for a 91 4.0 running 33's?

 

[BlackBII]

4.56's will work great. I ran a 4.0 and 33's for years and it didn't feel underpowered.

If you are looking to do a lot of crawling, then 4.88's may be a better choice.

 

[CreepyCrawler]

no crawling for this one. just a resto and small lift with tires. beach truck/weekend cruiser. 488s would be way too deep im assuming? truck hardly sees over 65mph

 

[ghunt81]

Well FWIW I have 32's on my truck with a factory 3.73 gear ratio and it still feels pretty good. Might be able to get away with that on an older 4.0 with a 5 speed, if not 4.10's would be good but you'll be buzzing pretty good RPM's on the highway. Guess that depends on how much low end grunt you want out of it.

 

[CreepyCrawler]

its older 4.0 of course and 5 speed.

 

[Mickey Bitsko]

its older 4.0 of course and 5 speed.

Don't be afraid of 4:56's

 

[grumpyguy]

Tech pages say 4:10's with 32-33's would be closest to being stock.

 

[Hagan]

With 4.10's at 65mph in 5th w/33's you'll be doing 2144rpm. Switching to 4.56's you'll be at 2384rpm. So a difference of 240rpm.

My 302 Ranger does 2433rpm at 65mph. It doesn't bother me. My car does 3350rpm at 65mph. And it has for the last 200k miles.

 

[4x4junkie]

I have 4.10s and well-worn 33s (about 31.5") on my '94 4.0L and still wish I had 4.56.

Definitely go 4.56.

 

[CreepyCrawler]

thanks. do you know anything about spartan lockers? as far as reliability and driveability

 

[gw33gp]

My Ranger came from the factory with 4.10 gears and 31" tires. I was able to use 32" tires with the 4.10 gears but it was marginal off-road. Going to 33" tires would not have worked for me off-road with the 4.10 gears. I switched to 4.56 gears and the work very well with the 33" tires off-road.

 

[Mickey Bitsko]

My Ranger came from the factory with 4.10 gears and 31" tires. I was able to use 32" tires with the 4.10 gears but it was marginal off-road. Going to 33" tires would not have worked for me off-road with the 4.10 gears. I switched to 4.56 gears and the work very well with the 33" tires off-road.

yup ^^

 

[RB7 Ranger]

You could split the difference and go with a 4:30 gear, I think that's what I am gona put in mine 3.73 now w/32 is weak

 

[gw33gp]

That would work with 2WD but they don't make 4.30 gears for the front differential. At least they are not available for my 02.

 

[Kona]

Had a Spartan locker in the rear for 3 years now, works great other then the usual bangs,crashes and lurches lunchbox's do occasionally . I had 4.56 with 33's which was great but led me to buy 35's which it works fairly well with.