Author Topic: Factory 4.88 (Read 3134 times)

rage · « **on:** May 04, 2009, 03:24:00 PM »

I recently found the axle code on my parts runner to be g144, factory 4.88. So I now am the owner of low mileage rear and ifs gears.Well, I have just read everything i could find in search here, pirate, and a toyota diff. thread on 4x4wire. So now i ask, what are yalls' opinion on durability, weather i should weld it or not? And if I should sell them, what should I ask for price? I'm pretty happy with the 4.30s i'm running now, as I use a 32" mud tire and a 31" street tire on a DD 86 4runner. Thanks in advance for the help.

-stephan

Snowtoy · « **Reply #1 on:** May 04, 2009, 04:42:28 PM »

If you have an auto transmission, the factory 4.88's are the right gear for 31's, but might cause your mpg's to suffer w/a 5spd and 31's on the highway. Here is an auto calculator page. Using the "Find Your RPM" calculator, plug in your current gears and tire size to get your rpm's at speed X and then try the 4.88's. If the rpms are only a few 100 higher it would probably be worth it to run them with the heavier Runner. I know a few people who like to run 5.29's w/33's in their runners w/a 4cyl. I would check the gearing yourself, just to make sure the 3rds weren't swapped out before you bought the parts truck.

As to value, if you have the 3rd members and front IFS section, maybe $400 for the set. The strength of the factory 4.88's isn't any different than that of the 4.10's or the 4.30's you have now, shouldn't have any issue Lincoln-Locking the rear.

46&2 · « **Reply #2 on:** May 04, 2009, 05:06:47 PM »

I knew it!! I have had a long on going debate with several of my friends that Toyota did sell vehicles with 4.88 gears stock. They all think I'm nuts. I assumed they came with automatics, but I wasn't sure if it was just the 4runners or if the trucks had them too.

THK Matt · « **Reply #3 on:** May 04, 2009, 05:22:54 PM »

Quote from: fortysixandtwo on May 04, 2009, 05:06:47 PM

I knew it!! I have had a long on going debate with several of my friends that Toyota did sell vehicles with 4.88 gears stock. They all think I'm nuts. I assumed they came with automatics, but I wasn't sure if it was just the 4runners or if the trucks had them too.

Only if the vehicle was equipped with 31s from the factory

My 90 4Runner with a 3.0 and Auto... has 4.10s and so does my 91 parts 4Runner with a 3.0 and 5spd.
both came equipped with (225/75R15s)

although my dads 95 4Runner 3.0 and 5spd has 4.56s factory as his came with 31s from the factory.

46&2 · « **Reply #4 on:** May 04, 2009, 05:39:59 PM »

Alright, so the criteria are:

3.0
Automatic
4runner
31 inch tires from the factory

Were the 4.88s OPTIONAL or if it matches those criteria its got 4.88s??

THK Matt · « **Reply #5 on:** May 04, 2009, 06:07:22 PM »

Quote from: fortysixandtwo on May 04, 2009, 05:39:59 PM

Alright, so the criteria are:

3.0
Automatic
4runner
31 inch tires from the factory

Were the 4.88s OPTIONAL or if it matches those criteria its got 4.88s??

i don't believe it was an option... just standard with that criteria.

I think the 1st gen 4runners with turbos and autos had the 4.37s or 4.56s.
but yes the 2nd gens with the 3.0 and auto W/ 31s equipped were 4.88s

46&2 · « **Reply #6 on:** May 04, 2009, 06:09:08 PM »

Quote from: THK90 on May 04, 2009, 06:07:22 PM

i don't believe it was an option... just standard with that criteria.

I think the 1st gen 4runners with turbos and autos had the 4.37s or 4.56s.
but yes the 2nd gens with the 3.0 and auto W/ 31s equipped were 4.88s

Cool just what I needed to know. Maybe i should put some money on this before I break the news to my friends

THK Matt · « **Reply #7 on:** May 04, 2009, 06:10:29 PM »

thats the info I have gathered from SEVERAL sources.
the factory tire size factors the gear ratio really....

46&2 · « **Reply #8 on:** May 04, 2009, 06:13:38 PM »

Quote from: THK90 on May 04, 2009, 06:10:29 PM

thats the info I have gathered from SEVERAL sources.
the factory tire size factors the gear ratio really....

Yeah I have heard this myself over the years but none of my friends have ever seen it so they think it doesnt exist. I could have sworn over the years I read numerous accounts of people with 4.88 stock thirds, obviously its not that common but it does exist. They just dont believe me.

THK Matt · « **Reply #9 on:** May 04, 2009, 07:49:44 PM »

Lol yeah... I just hate how you can't re-gear the thirds.

rage · « **Reply #10 on:** May 04, 2009, 08:04:20 PM »

The criteria are TOW PACKAGE and factory 31" tires with auto trans. Anyway, my runner is w56 with 4.30 and i think i am gonna run them 4.88s, unless someone will buy them soon. Thanks for the input guys.

-stephan

THK Matt · « **Reply #11 on:** May 04, 2009, 08:05:29 PM »

Tow package as well? good to know

mine didn't have a tow package or 31 $I\'m Down$

REG535 · « **Reply #12 on:** May 04, 2009, 09:01:53 PM »

Quote from: THK90 on May 04, 2009, 06:07:22 PM

i don't believe it was an option... just standard with that criteria.

I think the 1st gen 4runners with turbos and autos had the 4.37s or 4.56s.
but yes the 2nd gens with the 3.0 and auto W/ 31s equipped were 4.88s

I dont think thats right I think they were 4.30s with autos

THK Matt · « **Reply #13 on:** May 04, 2009, 09:07:08 PM »

4.30s in 1st gens.... yes correct... my bad.

4.56s we 3.0 5spds with Tow and 31s

rage · « **Reply #14 on:** May 04, 2009, 09:07:59 PM »

My 86runner came with auto and 4.30. the 4.88s came on my 94 v6 auto runner.

kneedownnate · « **Reply #15 on:** May 04, 2009, 09:38:12 PM »

Quote from: ToxicToy on May 04, 2009, 09:01:53 PM

I dont think thats right I think they were 4.30s with autos

My 80 came with 4.37, can't remember if the 79 did as well.

REG535 · « **Reply #16 on:** May 04, 2009, 09:40:41 PM »

I was talking about the ones with autos.

79coyotefrg · « **Reply #17 on:** May 05, 2009, 11:36:44 AM »

Quote from: rage on May 04, 2009, 08:04:20 PM

The criteria are TOW PACKAGE and factory 31" tires with auto trans. Anyway, my runner is w56 with 4.30 and i think i am gonna run them 4.88s, unless someone will buy them soon. Thanks for the input guys.

-stephan

Snowtoy · « **Reply #18 on:** May 05, 2009, 03:05:04 PM »

Quote from: fortysixandtwo on May 04, 2009, 06:09:08 PM

Cool just what I needed to know. Maybe i should put some money on this before I break the news to my friends

As mentioned it was the oem tire size and transmission that determined the gear ratio. In '90 when I was looking at for a new X-cab, you could get an auto w/oem 31's and 4.87 gear ratio. Even w/the taller gears it was gutless compared to the the 5-spd and 31's.

FLRunner · « **Reply #19 on:** May 05, 2009, 04:01:01 PM »

? when i took my rear 3rd apart this past weekend The only markings i could find on the ring gear was TOY 488 . There was also some engraved numbers . Just curious if these are factory gears ? There was no paint color on the pinon . but it did look like a new pinion nut . I am not sure how you could tell if its a factory 3rd or not ? I know my Aussie Locker worked fine with it though

THK Matt · « **Reply #20 on:** May 05, 2009, 09:12:09 PM »

Quote from: Snowtoy on May 05, 2009, 03:05:04 PM

As mentioned it was the oem tire size and transmission that determined the gear ratio. In '90 when I was looking at for a new X-cab, you could get an auto w/oem 31's and 4.87 gear ratio. Even w/the taller gears it was gutless compared to the the 5-spd and 31's.

AMEN to that!! Lol 33s, Auto and 4.10s

rage [OP]

rage [OP]

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