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.

80 series diff ratios

Tech Talk for Cruiser owners.

Moderators: toaddog, Elmo, DUDELUX

Post Reply
Posts: 1562
Joined: Sun Nov 21, 2004 7:26 pm
Location: Blue Mountains

80 series diff ratios

Post by -Richo- »

Can anyone tell me what ratios were available from the factory on 80 series cruisers, especially high pinion fronts?

Im aware of 4.11, but im hoping there is a 4.3 out there, ive searched here and elsewhere cant seem to find any info.
Yurich Design Services
www.yds.net.au
Posts: 2136
Joined: Mon Dec 01, 2003 6:36 pm
Location: Lake Macquarie

Post by 4sum4 »

4.11 and 4.1 in other series cruisers
[url=http://downunder4x4.net/forum/showthread.php?t=1650]86 Hilux[/url]
and a 84 extra cab



If Rocks Had P^ssies Our Lives Would Be Perfect :D...
Posts: 1562
Joined: Sun Nov 21, 2004 7:26 pm
Location: Blue Mountains

Post by -Richo- »

Cheers Gareth, not what i wanted to hear but you get that :armsup:
Yurich Design Services
www.yds.net.au
Posts: 1768
Joined: Sun Mar 14, 2004 11:51 am
Location: Weipa

Post by crankycruiser »

the 105's came out with 4.3's..
Posts: 701
Joined: Tue Feb 03, 2004 3:04 pm
Location: Melbourne

Post by 80UTE »

Some Bundies came out with the 4.3 not sure if diesel or petrol model but its a hi-pinion in the front and fits 80/100's

wally
THERES ONLY ONE SUBSTITUTE FOR CUBES AND THATS MORE and if you want more inchs stroke it !!!!!!!!!!!
Posts: 1562
Joined: Sun Nov 21, 2004 7:26 pm
Location: Blue Mountains

Post by -Richo- »

80UTE wrote:Some Bundies came out with the 4.3 not sure if diesel or petrol model but its a hi-pinion in the front and fits 80/100's

wally


I was wondering that, i know the rj70 comes in a 4.3, wasnt sure if it would fit into a 80 housing, thats what i wanted to hear ;)
Yurich Design Services
www.yds.net.au
Posts: 3614
Joined: Sat Nov 02, 2002 9:02 am
Location: Gold Coast

Post by 83 lux »

Drop Bear wrote:
80UTE wrote:Some Bundies came out with the 4.3 not sure if diesel or petrol model but its a hi-pinion in the front and fits 80/100's

wally


I was wondering that, i know the rj70 comes in a 4.3, wasnt sure if it would fit into a 80 housing, thats what i wanted to hear ;)


but you cant match up the rear
HOOLAY Wish i could buy boggers for my DH bike
Posts: 1562
Joined: Sun Nov 21, 2004 7:26 pm
Location: Blue Mountains

Post by -Richo- »

do you mean the 80 rear is different sized? i know, this is going in a lux hence the need for 4.3 ratio. I may later on down the track put an 80 series housing up front, just want to make sure i get a diff centre that will go in rather than have to buy it later on again, just wasnt sure if the bundera centres could fit, it seems 80, bundera and lux front centres are all interchangable.
Yurich Design Services
www.yds.net.au
Posts: 3614
Joined: Sat Nov 02, 2002 9:02 am
Location: Gold Coast

Post by 83 lux »

thats correct :armsup:
HOOLAY Wish i could buy boggers for my DH bike
Posts: 701
Joined: Tue Feb 03, 2004 3:04 pm
Location: Melbourne

Post by 80UTE »

83 lux wrote:
Drop Bear wrote:
80UTE wrote:Some Bundies came out with the 4.3 not sure if diesel or petrol model but its a hi-pinion in the front and fits 80/100's

wally


I was wondering that, i know the rj70 comes in a 4.3, wasnt sure if it would fit into a 80 housing, thats what i wanted to hear ;)


but you cant match up the rear


The rear can be matched ! A 100 series rear centre can be fitted with minimal grinding of the housing to clear the wider crownwheel and side gear change to suit 30 spline axles. 100 series have nice big gears in the rear to boot.

Wally
THERES ONLY ONE SUBSTITUTE FOR CUBES AND THATS MORE and if you want more inchs stroke it !!!!!!!!!!!
Posts: 1562
Joined: Sun Nov 21, 2004 7:26 pm
Location: Blue Mountains

Post by -Richo- »

arent the 100s diffs prone to breakage more so than the 80s? or is it just the standard pinion spacer thats making them fail? im thinking 100s parts are going to be a bit more expensive being newer aswell.
Yurich Design Services
www.yds.net.au
Posts: 701
Joined: Tue Feb 03, 2004 3:04 pm
Location: Melbourne

Post by 80UTE »

I never said 100 front diffs were tough i was refering to the rears what they lost in the front they made up for in the rear. As a general rule to lower the diff ratio the pinion is made smaller as the crown wheel cant get much bigger, usually the the pinion that lets go first, the less teeth on the pinion the more pressure on the contacting teeth and " BANG " In the case of the 100 rear diff the pinion has remained the same size as the 80 rear pinion, the crown wheel is about 1/2 inch bigger and moved across ( thats why you need to grind the cut outs in the housing to fit it ). The gears have a massive contact area at least twice that of a 4.1 cruiser rear diff. Thats why i made the statment that 100 rear diffs are tough.

Wally
THERES ONLY ONE SUBSTITUTE FOR CUBES AND THATS MORE and if you want more inchs stroke it !!!!!!!!!!!
Posts: 24
Joined: Sun Feb 15, 2009 8:31 pm
Location: Sydney

Re: 80 series diff ratios

Post by Green80 »

Do the 105 rear diffs have bigger pinion bearings?
Post Reply

Who is online

Users browsing this forum: No registered users and 18 guests