Topic: 91 Toyota 4x4 Tire Gear Question

[Grimmjow]

Hey everyone. I have read the faqs and the wheel tire thread.
I just have a question about what I have read. Iirc 31x10.50x15 will require re gear to 4.56 gears and 33s will require re gear to 4.88s? Thanks

[Snowtoy]

If you have a 5-spd, and want stock performance, that is correct gearing.  You can find both gear sets in oem geared diffs.

[Grimmjow [OP]]

What difs am I specifically looking for? Can I use the difs I have and install the lower gear sets or is there a carrier difference? Thanks

[Grimmjow [OP]]

I found this while searching. If its correct please inform me. Thanks again for your help.

These differentials seem to have come in a few different Toyotas. Combos for 4.88s we’ve seen are:

‘92-‘95 4Runner, IFS, V6, 31” tires, auto transmission, tow package
‘92-‘95 pickup, IFS, V6, 31” tires, auto transmission, tow package
The vehicle will also usually have:

door tag code of G144
white pinion paint code - the end of the pinion (driveshaft removed) will have paint on it
It seems that these are the most common combos, but there are also reports of non-tow equipped vehicles having 4.88s. Never hurts to check!

[Gnarly4X]

Hey everyone. I have read the faqs and the wheel tire thread.
I just have a question about what I have read. Iirc 31x10.50x15 will require re gear to 4.56 gears and 33s will require re gear to 4.88s? Thanks

It depends.  I ran 31s, 32s, and 33s with my 85 Standard Cab, 5-speed with stock 4.10 gears for 10 years.

But... as Snow said.... re-gearing for larger tires is better if you want to have your factory torque in the right RPM range and in the right trans gear position.

Gnarls.

[Snowtoy]

I found this while searching. If its correct please inform me. Thanks again for your help.

These differentials seem to have come in a few different Toyotas. Combos for 4.88s we’ve seen are:

‘92-‘95 4Runner, IFS, V6, 31” tires, auto transmission, tow package
‘92-‘95 pickup, IFS, V6, 31” tires, auto transmission, tow package
The vehicle will also usually have:

door tag code of G144
white pinion paint code - the end of the pinion (driveshaft removed) will have paint on it
It seems that these are the most common combos, but there are also reports of non-tow equipped vehicles having 4.88s. Never hurts to check!

The available years for the G144 gears, should be '89-95(non-Taco) trucks and '90-'95 4-Runners that came w/31's, the 31" tire package was offered for the '90 model year trucks and 4 Runners, not sure if it was offered for the '89 model year trucks or not.

G254 is for the 4.56 gear set, and came in manuals with 31's, and at some point 2nd gen 4-Runners with autos instead of 4.30's, my sister's'95 had SR5 had them.

[CORRODED]

Can I use the difs I have and install the lower gear sets or is there a carrier difference?

You can install those the gears you want in your differentials, you just have to order the appropriate gear set

[helipilot77]

https://www.marlincrawler.com/differential/ring-pinion#calcs

[Grimmjow [OP]]

Thanks for the info guys. I will put it to good use.

[clange]

I found this while searching. If its correct please inform me. Thanks again for your help.

These differentials seem to have come in a few different Toyotas. Combos for 4.88s we’ve seen are:

‘92-‘95 4Runner, IFS, V6, 31” tires, auto transmission, tow package
‘92-‘95 pickup, IFS, V6, 31” tires, auto transmission, tow package
The vehicle will also usually have:

door tag code of G144
white pinion paint code - the end of the pinion (driveshaft removed) will have paint on it
It seems that these are the most common combos, but there are also reports of non-tow equipped vehicles having 4.88s. Never hurts to check!

The above is correct. I have a 1993 4Runner, IFS, V6 (Now converted to the 3.4), 31" tires and Auto Transmission with 4.88's.

[blackdiamond]

I ran 4.10 gears with 32s in my ‘85 truck and was happy with its performance in Colorado (i.e. mountain passes). I was in Washington State when I went to 33s and almost immediately made the jump to 4.88 gear.  I now am running 35s with the same differentials in my ‘89 4Runner SAS.