Notice: We request that you don't just set up a new account at this time if you are a previous user.
If you used to be one of our moderators, please feel free to reach out to Chris via the facebook Outerlimits4x4 group and he will get you set back up with access should he need you.
Recovery:If you cannot access your old email address and don't remember your password, please click here to log a change of email address so you can do a password reset.

How to find my diff ratio

Tech Talk for Cruiser owners.

Moderators: toaddog, Elmo, DUDELUX

Forum rules
Post Reply
Posts: 55
Joined: Thu May 14, 2009 9:26 pm
Location: Sunbury

How to find my diff ratio

Post by dansharp »

Looking to find what ratio my rear diff is. Car only recently bought so have no idea if it is an original diff or not. It is in a 1985 Hilux dual cab diesel. Cheers
Top
Posts: 5256
Joined: Fri Jun 16, 2006 6:49 pm
Location: Melbourne

Post by Struth »

Trans/axle code on the plate under the bonnet.

Last 3 number should be the axle code.

Ring Mr toyota spares and tell em you need one, ask what ratio they are offering to replace it.

cheers
Top
Posts: 33
Joined: Tue Jun 23, 2009 8:46 pm
Location: SA

Post by Tonka tuff 4x4 »

the only way you can tell is to pull diff centre out.
Top
Posts: 55
Joined: Thu May 14, 2009 9:26 pm
Location: Sunbury

Post by dansharp »

cheers so diff centre out hey....... dam
Top
Posts: 1072
Joined: Sat Aug 26, 2006 6:04 pm
Location: Melbourne

Post by Weiner »

Or you just look at this

http://www.rsmotorsport.com.au/technica ... _Hilux.pdf

Or off Pirate4x4

Originally posted by TNToy
----------------------------------------------------
If you have the axle code of your vehicle, it is easy to find out what size differential, what ratio, and what pinion set-up you have. This will also help if you are hunting for a particular unit off another vehicle. The axle code is in the vehicle ID plate under the hood or drivers door. The axle code is 4 digits: a letter followed by 3 numbers.

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
'89 Hilux Single Cab - 3RZ, 35" Kreepy Krawlers, 4.88's, F & R Air lockers, RUF, Longfields, TG Highsteer, Highmount and no money
Top
Posts: 826
Joined: Mon Mar 20, 2006 1:08 pm
Location: Redcliffe

Post by berad »

What are the last 3 numbers/letters on the trans/axle plate.


Weiner has given you all the info you need, being a 85 model deisel it will be 4.3 or 4.5

Mine were 4.5s til i went 4.88's, and mine was a 84 diesel dual cab, with 31's standard according to the trans/axle code's.
BBP Offroad
Boondall Backyard Performance

They call me the MR. throw cash at shiz til its comp specccccc
Top
Posts: 1072
Joined: Sat Aug 26, 2006 6:04 pm
Location: Melbourne

Post by Weiner »

I am guessing 4.3 :armsup:
'89 Hilux Single Cab - 3RZ, 35" Kreepy Krawlers, 4.88's, F & R Air lockers, RUF, Longfields, TG Highsteer, Highmount and no money
Top
Posts: 412
Joined: Mon Jul 10, 2006 10:53 pm
Location: 36 28'56 S 150 04'11 E

Post by mudmacaca »

count the crown wheel teeth then divide by the pinion teeth
If you dont have panel damage you ain't trying hard enough
Top
Posts: 3740
Joined: Sat May 26, 2007 5:04 pm
Location: Licking a window near you

Post by 80's_delirious »

mark the pinion flange, and mark the tyre. Have someone rotate the tyre one full turn and watch the pinion and count how many times it turns,

eg 4 1/2 turns + 4.5:1, 4 1/3 turns + 4.3:1 almost 5 turns probably 4.88:1
Top
Posts: 16934
Joined: Sun Oct 20, 2002 6:57 pm

Post by RUFF »

It will be a 4.56 if its still the stock centre.

You do not have to pull the centre out to check it if your unsure on it ever being changed. Jack one wheel up. Put a mark on the pinion flange. Now turn the wheel one full rotation. While doing this count how many rotations the pinion does. Then multiply it by two. That will give you the ratio.
Top
Posts: 16934
Joined: Sun Oct 20, 2002 6:57 pm

Post by RUFF »

80's_delirious wrote:mark the pinion flange, and mark the tyre. Have someone rotate the tyre one full turn and watch the pinion and count how many times it turns,

eg 4 1/2 turns + 4.5:1, 4 1/3 turns + 4.3:1 almost 5 turns probably 4.88:1
If you only rotate the tyre once you need to multiply the pinion by 2. Unless the vehicle is fitted with a spool or locker and its locked.
Top
Posts: 1715
Joined: Tue Sep 06, 2005 8:38 pm
Location: at my wits end

Post by RED60 »

RUFF wrote:It will be a 4.56 if its still the stock centre.

You do not have to pull the centre out to check it if your unsure on it ever being changed. Jack one wheel up. Put a mark on the pinion flange. Now turn the wheel one full rotation. While doing this count how many rotations the pinion does. Then multiply it by two. That will give you the ratio.
Finally someone got it right...... :cool: :cool:
Show me the money..SHOW ME THE MONEY
Top
Posts: 137
Joined: Mon Jun 09, 2008 11:05 am
Location: Gladstone

Post by one_waz »

can someone tell me, out of all the hilux ratios 4.3 4.5 4.8 etc is the tooth count on the pinion the same and just the ring that is different? or do they both change?

cheers
Top
Posts: 1072
Joined: Sat Aug 26, 2006 6:04 pm
Location: Melbourne

Post by Weiner »

one_waz wrote:can someone tell me, out of all the hilux ratios 4.3 4.5 4.8 etc is the tooth count on the pinion the same and just the ring that is different? or do they both change?

cheers
Both are different
'89 Hilux Single Cab - 3RZ, 35" Kreepy Krawlers, 4.88's, F & R Air lockers, RUF, Longfields, TG Highsteer, Highmount and no money
Top
Posts: 137
Joined: Mon Jun 09, 2008 11:05 am
Location: Gladstone

Post by one_waz »

ok cheers
Top
Posts: 443
Joined: Tue Dec 25, 2007 6:03 pm
Location: Tasmania, Australia

Post by vk7ybi »

RUFF wrote:
80's_delirious wrote:mark the pinion flange, and mark the tyre. Have someone rotate the tyre one full turn and watch the pinion and count how many times it turns,

eg 4 1/2 turns + 4.5:1, 4 1/3 turns + 4.3:1 almost 5 turns probably 4.88:1
If you only rotate the tyre once you need to multiply the pinion by 2. Unless the vehicle is fitted with a spool or locker and its locked.
Yes, its more accurate to rotate the tyre twice rather than multiplying the pinion.
Top
Post Reply

Return to “Cruiser / Prado”

Who is online

Users browsing this forum: No registered users and 67 guests