Author Topic: Streetable Gear ratios (Read 3591 times)

DieselD · « **on:** Jun 12, 2007, 09:25:18 PM »

First off let me start out saying that I have searched around this site and among others without much luck. If its been talked about please slap me upside the head but only after pointing me in the right direction

Some information on what I plan to build. 84-88 extended cab, 22re 5spd double t-case. most likely only 2.28 gears for now in both cases

My question is what gear ratio is going to be idea for some street driving? Of course I know I will need to be either 4.88 or 5.29s. I only plan to drive locally and to and from trails for day trips. any over nighter or long distance run to moab will be trailered. I know tire size matters and I am somewhat at a cross roads with that too. I will be anywhere in the 35-37 range. by streetable I mean speeds around the 65-70mph range.

This will be my first toyota wheeler(I had a 93 2wd for a daily a few years back) so bear with me if my questions are retarded. I am a former fullsize bronco guy.

thanks for any insite.

Duffil · « **Reply #1 on:** Jun 12, 2007, 09:29:56 PM »

with tires that size, you'll want 5.29s. You can run at lower RPMs on the highway with 4.88s, but you will lose a little response out of the truck.

BTW: head to the noob section and introduce yourself.

brainlessfool · « **Reply #2 on:** Jun 12, 2007, 09:35:09 PM »

5.29 X2

fullthrottle · « **Reply #3 on:** Jun 12, 2007, 09:36:34 PM »

5.29 x3

Tallchevy · « **Reply #4 on:** Jun 12, 2007, 09:39:27 PM »

Quote from: rockyot on Jun 12, 2007, 09:25:18 PM

If its been talked about please slap me upside the head but only after pointing me in the right direction

Here is a formula that will help
New tire size divided by old tire size multiplied by current axle ratio equals new axle ratio

35/28X4.10=5.125 so a 5.29 is close.
37/28X4.10=5.41 so 5.29 is close.

I'm guessing 28 is a stock size tire but not positive.

I hope this helps

DieselD · « **Reply #5 on:** Jun 12, 2007, 10:11:26 PM »

i kinda had a feeling that was going to be the popular answer. Im new to this whole 4 popper gearing. in a fullsize a 4.56 gear was low

myyota · « **Reply #6 on:** Jun 12, 2007, 10:56:50 PM »

I have the same set up on my 85 truck now that your looking to put on your truck, 5.29 gears with 37'' MTRs and duel cases, its a good set up and i think you will be happy with it. the only difference in my truck from yours is that my truck is carbed not efi.

Rockcrawlintoy · « **Reply #7 on:** Jun 12, 2007, 11:17:50 PM »

5.29s will be perfect

DieselD · « **Reply #8 on:** Jun 13, 2007, 07:04:21 AM »

what are your street rpms and mph?

mima · « **Reply #9 on:** Jun 13, 2007, 01:05:02 PM »

5.29 X4

Fearofrunner · « **Reply #10 on:** Jun 13, 2007, 01:17:45 PM »

Quote from: rockyot on Jun 13, 2007, 07:04:21 AM

what are your street rpms and mph?

5.29s and 35's it's a little under geared but is pretty much like how it use to be stock.

at 40 mph 4th gear is about 2100 rpms
at 55 mph 4th gear is about 2850 rpms
at 65 mph 4th gear is about 3300 rpms
at 65 mph 5th gear is about 3000 rpms
at 75 mph 4th gear is about 3550 rpms
at 75 mph 5th gear (besides no power and barely holds it haha) 3300 rpms

BigMike · « **Reply #11 on:** Jun 13, 2007, 02:02:23 PM »

If you are leaning towards 37" tires, then:
http://board.marlincrawler.com/index.php?topic=32786.msg371994#msg371994 (nice speed table)

If you are not going over 35" tires, then:
http://board.marlincrawler.com/index.php?topic=21997.msg233105#msg233105

DieselD · « **Reply #12 on:** Jun 13, 2007, 02:55:39 PM »

Thanks big mike that was the kind of info I was looking for.

I think I will go with 5.29s. I will defently run at least a 35. most likely a 36 or 37. It will also be a swamper brand so it will be closer to a "true" height number. I know my 35mtrs on my bronco where smaller than a 33 swamper on a buddys jeep.

46&2 · « **Reply #13 on:** Jun 13, 2007, 11:42:39 PM »

Yeah 5.29s are the way to go. I can cruise 70-75 in 5th gear at about 3,000ish RPMs. Couldnt be happier with my street driving and 5.29s. I run 35s.

*ROKTOY* · « **Reply #14 on:** Jun 14, 2007, 07:46:01 AM »

Quote from: fortysixandtwo on Jun 13, 2007, 11:42:39 PM

Yeah 5.29s are the way to go. I can cruise 70-75 in 5th gear at about 3,000ish RPMs. Couldnt be happier with my street driving and 5.29s. I run 35s.

X2

~tc~ · « **Reply #15 on:** Jun 14, 2007, 08:55:14 PM »

Better to have our engines geared too low than too high. They like RPMs WAY more than being lugged.
5.29 for 35's

5.71 for 37's
Keep in mind, I'm at altitude, so power is a bit more of a concern.

And before everyone comes in saying 5.71's are weak because of too few teeth on the pinion, both 5.71 and 5.29 have 7 tooth pinions!

TurtleTappers91 · « **Reply #16 on:** Jun 14, 2007, 09:27:42 PM »

you can get by with 4.88/35's just fine too. I do. the torque is there. I plan on 36" or 37" tires.
I would rather have 5.29 though, If I had it to do over....I find that on trail rides with other 5.29 geared trucks, I have to give myself a little more space to speed up/slow down because I can't seem to match their speed perfectly. It sucks.
But I can do 110 mph, downhill of course.

bigarms23 · « **Reply #17 on:** Jun 16, 2007, 04:51:43 PM »

I run 488s with 37 on the street and i top out at 90 mph on the freeway either way the dicision is up to you.

DieselD · « **Reply #18 on:** Jun 16, 2007, 05:30:18 PM »

Ive settled on going with 5.29s

TurtleTappers91 · « **Reply #19 on:** Jun 17, 2007, 11:56:12 AM »

Quote from: rockyot on Jun 16, 2007, 05:30:18 PM

Ive settled on going with 5.29s

$Beer Chug\'n$

46&2 · « **Reply #20 on:** Jun 17, 2007, 12:23:33 PM »

Quote from: rockyot on Jun 16, 2007, 05:30:18 PM

Ive settled on going with 5.29s

Good choice, you wont be dissapointed!

DieselD · « **Reply #21 on:** Jun 17, 2007, 10:42:30 PM »

no if i could just finger out what i want to do for everything else?? once decision made 500 more to go

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