Can anyone please tell me the stock ring and pinion gear ratios for a 1981 toyota pickup? I need to install lower gears for crawling on the trails and I am a newbie at this. Be gentle, lol!

 

4.10s

 

Nope. 1981 was the one, and only, year that 4WD PUs came with 3.90s(no options).



1st Gen:
79-80 = 4.38
81 = 3.90
82 = 4.11
83 = 4.10

2nd Gen:
84-88 = 4.10 or 4.30

 

where is that image from?

 

Mud hippy is right that that year came stock with 3.90's. Here's two other ways to tell:
Example: G292 = 8.0" 4.10 final ratio 2 pinion
Code:
1ST R&P SIZE 2nd/3rd R&P RATIO 4th DIGIT PINION SET-UP
F = 7.5" 07 = 3.900 2 = 2 pinion
G = 8.0" 08 = 4.110 3 = 2 pinion LSD
10 = 4.375 4 = 4 pinion
14 = 4.875 5 = 4 pinion LSD
25 = 4.556
28 = 4.300
29 = 4.100
31 = 3.91
38 = 3.42
43 = 3.56
54 = 3.90
66 = 3.07
.
.
Code:
Ratio Ring/Pinion Color Crawl:Ratio
3.42 ...42/12... Purple ...31:1
3.90 ...39/10... Red... ...36:1
4.10 ...41/10... Pink.. ...37:1
4.11 ...37/09... Orange ...37:1
4.30 ...43/10... Blue.. ...39:1
4.37 ...35/08... Green. ...40:1
4.56 ...41/09... Yellow ...41:1
4.88 ...39/08... White. ...44:1
5.29 ...37/07... None.. ...48:1
5.71 ...40/07... None.. ...51:1

 

Here's the link.

 

nice, thanks.

 

thanks for the info guys. no wonder my truck is gutless as all hell! I'm pushing 33's.

 

hi jaked (maybe ) how do i find out what gears my 94 3slow runner has

 

Search.

Or if too lazy to do so:
- http://www.4crawler.com/4x4/4R_TechI...oDetermination

 

i did, just not the right way. thanx

 

Ive always liked this page.

http://www.brian894x4.com/Gearratiosanddiffs.html

 

i am in the same boat, i have an 81 2wd on 33x12.50 15's with stock gears and need to regear. were you able to find some and if so where and what size did you go with?