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.

diff ratio, BJ42

Tech Talk for Cruiser owners.

Moderators: toaddog, Elmo, DUDELUX

Forum rules
Post Reply
Posts: 26
Joined: Tue Nov 29, 2005 2:08 pm
Location: bathurst, NSW

diff ratio, BJ42

Post by red rattler »

hi all, i am looking at putting new crown wheel an pinion in my bj42, 1982 and was just wondering what the factory diff ratio is? Someone told me 3.7, is that correct? I am currently running 33's and was also wanting to know if i should get a lower ratio , the car is mainly used for 4 wheel driving, and if so what new ratio should i get. Any info on what you have done would be great. thanks.
bj42 - built to last , not go fast
Top
Posts: 6029
Joined: Tue Dec 24, 2002 9:34 pm
Location: South Australia

Post by bad_religion_au »

it'll be 4.11:1 and i wouldn't bother changing ratio's for 33;s
Spit my last breath
Top
Posts: 3073
Joined: Sun Jul 27, 2003 5:37 pm
Location: Mornington Peninsula, Victoria

Contact:
Contact bj42turbo

Post by bj42turbo »

I agree with Bad relig, I run standard 4.11:1 with 34' tyres with no problems, although turbo does help


BJ
Top
Posts: 6029
Joined: Tue Dec 24, 2002 9:34 pm
Location: South Australia

Post by bad_religion_au »

i'm goin to attempt q78's (35.5's) on 4.11's :D
Spit my last breath
Top
Posts: 26
Joined: Tue Nov 29, 2005 2:08 pm
Location: bathurst, NSW

Post by red rattler »

thanks for that BJ and bad_relig, much appreciated. the reason i asked was because my rear diff appears to be making a bad "wine" noise whan driving and i was thinking of replacing the crown wheel and pinion, but i think i will first try some thicker oil and see if that fixes it. hopefully!!
Cheers , Chris
bj42 - built to last , not go fast
Top
Posts: 2588
Joined: Mon Apr 19, 2004 10:45 pm
Location: Hobart Tas

Post by Reddo »

check that the pinion is not loose - just grab it an give it a shake. If it is, you may be able to cure the whine by tightening the pinion nut (in middle of the drive flange), they often work loose. And if there's a crush tube in there, tighten the nut a bit more using a long wrench or rattle gun (CAREFULLY) and u can improve the backlash. Worth trying before u pull it apart. It worked for me!
Nice gq swb ute chop with a huffer for the good times
Top
Posts: 6029
Joined: Tue Dec 24, 2002 9:34 pm
Location: South Australia

Post by bad_religion_au »

hmm i had similar symptoms and it turned out to be my T case idler bearings... but your probably in luck, you've got a split case so they're stronger.
Spit my last breath
Top
Post Reply

Return to “Cruiser / Prado”

Who is online

Users browsing this forum: No registered users and 37 guests