Is '75 FJ40 rear axle the same as '77s?

[denisbut]

I searched through the forum and did not find an answer. I want to replace entire rear axle in 77 FJ40 due to bad 3rd member and came across the one from 75 model(stock 2F and four speed in donor).
Are axles (and both drive shafts, by the way) from these two model years 100% interchangeble? I mean driveshaft flanges, splines and especially gear ratio. Definite answer will be appreciated tremendously.

 

[woody]

69-77 rear axles should be effectively identical....some minor changes in brake line routing is all I can think of....

fine spline side gears/rear axle shafts
coarse spline pinion, 4.10 ratio

you 'might' need to swap some driveshaft pieces together, small chance the pattern on the diff flange is different, but I don't believe so....

 

[tucker74]

The pinion flange size changed in '74, pattern got slightly larger and went from 9mm to 10mm bolts. '75 and '77 should be a direct swap -

Tucker

 

[denisbut]

FJ40 axles

Thanks for repplies, guys!!