Author Topic: 85 4-runner gear ratio and lift (QUESTION!) (Read 4938 times)

ihanberg · « **on:** Jul 21, 2004, 07:03:42 PM »

allright here is my question i have a 1985 4-runner that is completly stock, it originally came with an automatic transmision and i have since droped a manual transmision in it a w-56 from an 88 pickup to be exact. from what i understand my stock gear ratio is 4:30's and with 31:10 50's it has a bit of a struggle getting around. im not an extreme 4-wheeler put i do like to go wheeling and have fun. what would be a good suggestion for my diff ratio? this is also my only transportation. Ive also considered a lift seeing as how my tires rub when my suspension flexes.im a starving college student so i dont want to spend to much but i do understand its not cheep!any and all advice would be appreciated thanks!

WHITE_TRASH · « **Reply #1 on:** Jul 21, 2004, 07:05:42 PM »

Id use 4.88's and build your own suspension after you read $300

ihanberg · « **Reply #2 on:** Jul 21, 2004, 07:11:18 PM »

how well in your opinion do you think i would do on the highway and fuelmilage!?

WHITE_TRASH · « **Reply #3 on:** Jul 21, 2004, 07:14:16 PM »

Pretty good on the highway if you stay with tires under 33's. The milage wont suffer at all if any with 4.88's and 33's it puts the engine back into its normal powerband.

el gato · « **Reply #4 on:** Jul 21, 2004, 08:25:07 PM »

You will better milage with 35's and 488's then with 33's. Your speedo will be close to stock as well. If you are just cruising the city and off road go with 529's and 35's.

BLUCRUZ · « **Reply #5 on:** Jul 21, 2004, 09:00:02 PM »

22re, lots of head work, thorley header, w-56, 37 MTR's & 5.29's & I get around 16mpg.

robrocketanski · « **Reply #6 on:** Jul 21, 2004, 09:49:31 PM »

in your original post you said that you have a hard time gettiing around but 4.30 should be peppier than 4.10 or your truck was made to have an auto and 4.30 b/c the auto has a higher first and switching to a 5 spd gives you a lower gear.

ihanberg · « **Reply #7 on:** Jul 21, 2004, 11:18:57 PM »

so you think the gear ratio i have is sufficient? i dont know much but i do know that i seem to have to slip the clutch alot as if it had really tall gears! and i was asuming that i had 4;30's i was told that thats what stock automatics came with. i drove someonelses 4-runner and it drove completley different it seemed to go alot easeir for lack of better words.

WHITE_TRASH · « **Reply #8 on:** Jul 21, 2004, 11:37:18 PM »

Im running 3.90's with 38" tsl's

Pretty sluggish on the bottom but not bad above 3k.

Skinny_Pedal · « **Reply #9 on:** Jul 22, 2004, 02:26:07 AM »

just wondering. didnt the 2wd drives come with the 3.90's.

WHITE_TRASH · « **Reply #10 on:** Jul 22, 2004, 02:29:00 AM »

81 4x with a 4 speed.

Skinny_Pedal · « **Reply #11 on:** Jul 22, 2004, 09:17:57 AM »

is that what they all have? because 81toyx has a 4speed in his truck w/ 32's and it doesn't like taking off? we thought it had 4.10's?

WHITE_TRASH · « **Reply #12 on:** Jul 22, 2004, 01:32:19 PM »

Pretty good chance that he has the same as I.

kyle_22r · « **Reply #13 on:** Jul 22, 2004, 02:00:37 PM »

79-80 had 4.375s, '81 had 3.90s and all base model manual transmission trucks after that had 4.10s

i'd recommend 4.56 or 4.88 gears for 31" tires

ihanberg · « **Reply #14 on:** Jul 22, 2004, 08:30:26 PM »

does anyone know what the stock gear ratio is on an 85 4-runner with an automatic? or where would i find out!

el gato · « **Reply #15 on:** Jul 22, 2004, 09:08:16 PM »

You should be able to take off either drive shaft and look at the center of your driveshaft/diff connection and look for a painted dot. Take note of that color and call your Toyota Service Center and ask them. I have a chart somewhere... I will try to find it and post it

81Toy4x · « **Reply #16 on:** Jul 23, 2004, 10:07:25 AM »

So since I'm running 3.90's with a 4-speed and 32's. I would probably be fine if I just went to 4.88's when I increase to 35's. But 5.29's would probably be funner.

WHITE_TRASH · « **Reply #17 on:** Jul 23, 2004, 12:02:29 PM »

Yep lower gears make a world of difference on road. Ill let you drive the 90 in Sept. and Im sure SHawnB will let ya drive his to check out the difference.

robrocketanski · « **Reply #18 on:** Jul 23, 2004, 03:16:51 PM »

auto came w/ 4.30 until about 90 then 4.56 if it was 22re/auto

MagPede · « **Reply #19 on:** Jul 25, 2004, 05:08:47 PM »

I guess my truck gets to be the oddball with 4.111's. The chart on this page should help you determine your gear ratio.
http://www.off-road.com/toyota/tech/other/4_axles.html

ihanberg [OP]

ihanberg [OP]

ihanberg [OP]

81Toy4x

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