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FJ40 rear diff ?
Posted: Wed Oct 12, 2005 12:52 pm
by wopass
easy question for you guys who know...
what other model cruiser diffs will fit into the rear of my FJ40 ? 30 spline 4.1 ratio ?
60 series ?
70 series ?
80 series ?
or do i have to use a 40 ???
cheers
Posted: Wed Oct 12, 2005 1:25 pm
by Tiny
anything you want to bother making fit
whole diff assembly or just diff centre?
Posted: Wed Oct 12, 2005 2:27 pm
by beanz2
Since you said it is a 30 spline pinion, I assume you are looking to swap only the centre. I assume you also have a full floater axle since semi floaters will not accept limited slips or factory lockers.
If you are looking to bolt a differential centre in without replacing anything, then these would fit:
1981-84 60 series
1978-80 55 series
1978-84 45 series (duhh)
If you don't mind changing or redrilling the pinion flange to match your driveshafts, these would also fit:
1985-90 60 series (including the 61 and 62)
1985-99 leaf sprung 70 series (also 73,74,75 - non Bundy)
1990-97 rear 80 series (minor difference in ratio, 4.10 vs. 4.11)
Dave
ok
Posted: Fri Oct 14, 2005 5:07 am
by wopass
cool, so they are all the same size ( 9" ) as the 40 diff just have different Drive shaft to pinion flange bolt spacings... ? ?
Posted: Fri Oct 14, 2005 5:18 am
by beanz2
Yes. If your FJ40 is 1978-1984. The flange bolt pattern changed in 1985 but as the flange is round, you can redrill it to suit.
Dave
ok
Posted: Fri Oct 14, 2005 7:52 am
by wopass
cheers dave
mines the early model 1970 so will have to re drill i guess...