Outer Limits 4x4 Board

askn those that know if bj42 & fj40 diff ratios are the same or any other info can a 42 rear diff fit a 40 nfront cheers.

bj40 and fj40 have different diff ratio's as the bj is a deisel and fj are petrols a 42 series diff from what i remember will fit but check ratio's first

There's only 2 ratio's that I have come accross,3.9 and 4.1.
The 3.9 are early and rare now.They are also coarse spline ,as are the early 4.1 ,so they are weaker.
J Top

ok then does this help petrol is 82 desiel is 83/4 cheers

I should clarify,the pinion has the coarse spline,they all fit,the early L/C s
had a smaller driveshaft flange ie pre 74.
Just check the ratio's.
J Top

maybe i should go n buy the other diff that matches or just put old centa in new house

i have a feeling that all mid-late 4x series imported to aus have 4.11:1 ratio including fj and bj models. 55 and 60 models got the same ratios too. Later model fj series imported to canada and the states and other places got 3.70:1 from the mid-late 70s onwards.

The axle designation on the id plates on the firewall should get you the info, if you just make sure that the numbers match b4 you swap them out.

cheers
Sam

thanx mite just use old centa in new house 2 b safe