Early A413 - should I be concerned?

[Anonymous_User]

I have an '86 Turbo Z clone. Stock bottom end, one piece TII top end, slightly modded swirl head, TII turbo, +40's, 3-bar, etc. Should run 18-20 psi.

The car has its original '86 A413 with the small axles. Will this become the weak link?

[turbovanman²]

Yep, the axles are the weak link,

If your really concerned, just change it out for a 87 and up unit, and of course, change the axles,

[Keito]

My 84 trans has gone 13 flat.
(in my gutted Omni)

[85_600]

How weak though? Like, how much hp/psi/whichever would it take before breaking? Since A.U. has an 86 I'm guessing the 85 413 is the same.

Thanks,
Paul

[turbovanman²]

For stockish applications, there fine. Some have also gone fast on them but its a matter of time before they break.

[Anonymous_User]

Thanks, Keito. That makes me feel better, but..... a gutted Omni is going to be a lot lighter - easier on parts - than my complete Turbo Z. Guess I'll just run it till it breaks, then upgrade.

[TurboJerry]

I'd be worried about the D.S. diff bearing also.It is inside the ring gear a ways. The bearing gets toasted way easier than should be allowed. It will make noise when it lets you know there is a problem, and the dreaded seal leak if it gets *really* loose.

[turbovanman²]

^^ I knew I missed something. Thats the other weaker link, it has the smaller bearing on the drivers side of the diff carrier.

[TurboJerry]

The bearing is the same size, it's just *way* inside the ring gear compared to the '87+ stuff...... Much more leverage to put extra pressure on it. '96 was the start for the big bearing setup....