FirstToy said:
Derek,
When I first read this, it sounded like you are saying the 80's birfs are weaker than the 100's IFS
but I realize you meant that in the world of SFA, the birf maybe somewhat weaker compared to other SFA cv's-- but it's a good design to have it a "weak link" in the chain.
James -
Yup, that's correct. However, in addition to that, I also meant to say that both 80 and 100 (and 40/60 for that matter) have CVs in the front axle. Doesn't matter whether it's SFA or IFS. If it gets engine power, and it swivels, it has to have a CV joint.
For johnny4ever, the 80/100 are fulltime 4WD, so the front axle gets power all the time, so it must have CVs. However, so does your 60 since, when you lock the hubs and put it in 4WD, it now also has power going to the front axle, but the wheels still must be able to turn left/right for steering.
I haven't actually checked this out on the 100 (though I don't know how it couldn't be so) but on vehicles where the drive axle is independantly suspended, you actually have four CVs, not two:
1.) left outer (at the left wheel hub)
2.) left inner (at the diff or transmission, depending on drive layout)
3.) right inner (at the diff or transmission, depending on drive layout)
4.) right outer (at the right wheel hub)
Since (one of) the drive axles on the 100 is independantly suspended, it must have four CVs on it, unless Toyota engineers figured out something I haven't heard of (which is entirely possible).
The 80, like the 40 and 60, only has a single pair of CV joints (one joint at each front wheel hub). No need for inner CVs since the axle does not move in relation to the diff (except to rotate in a single plane to drive the wheels).