Axle Size

[Tentsontop]

This might be a dumb question, but how big are 80 axles? Dana 44 or are they larger?

 

[IdahoDoug]

I'm fairly certain the 93 and up FZJ axles are larger in diameter than the D44 axles, and also more splines. I recall a discussion comparing them to a Dana 60 axle in strength.

DougM

 

[sleeoffroad]

30 spline so the same as a 30 spline dana 60. With aftermarket parts can be stronger. Close to 35 spline Dana 60.

 

[locrwln1]

30 spline so the same as a 30 spline dana 60. With aftermarket parts can be stronger. Close to 35 spline Dana 60.

Which is the same size as Dana 44 30 spline axles. The front axle inners are 30 splines like the d44. The ring gears are 7.8?? (toy, commonly referred to 8") and 8.5 (d44). The stock 80 birfs are quite a bit stronger than stock d44 u-joints. The rear axle is very similiar to most 3/4 ton Dana 60's. Same size 30 spline full floating axles and 9.5 (Toy) vs. 9.75 (60) ring gear size.

Once you get into custom alloy axles, the strength comparisons are all over the place.

Jack