should i use a solid differential mount?

[blueovalz]

Tom, I have been using a solidly mounted rear end in mine for many years (racing years) with no cracks. My only concern, and I've never brought this up before, is if you use solid mounts on one end (either end) of the differential, then you should use them on both ends. The reason I FEEL this should be the case, is that the solidly mounted end is not really designed to flex, but if the other end is moving around, then obviously the solid mount and/or the aluminum case has got to flex too, and this, to me, is the setting for something to crack or break. Even if the movement is a fraction of an inch, in time fatique will take it's toll. Again, this is only my opinion, but you should go all the way with either one (solid mounts) or the other (flexable mounts), but not both. IMHO mixing is asking for trouble.

[DavyZ]

Fairlady 327 broke the solid front mount and did not have a solid rear mount---this jives completely with what Terry just mentioned. If parts are flexing, something will give--either the mount or the case. Better to have both mounted with similar materials.

 

BTW, Fairlady 327 is nixing the solid mount--too harsh, too much noise, etc. Len, am I right about that? That's what I remember anyway...

 

Davy

[Guest Anonymous]

This would make sense, you would'nt use a solid tranny mount with rubber engine mounts, same sorta deal IMHO.

 

Regards,

 

Lone

[Guest tom sixbey]

hey guys, i just ordered a complete poly bushing set and a solid rear end mount..

 

I plan on autocrossing this car and using it as a daily driver. I dont mind noise and vibrations, but will this mount crack my differential case like someone told me yesterday? - do any of you guys drive a Z with a solid mount?

[Guest tom sixbey]

thanks for the info guys - how would one get a so;lidly mounted moustache bar?

[Guest Anonymous]

Does anyone make solid aluminum or steel mustache bar bushings? I'm thinking for it to be solid, maybe just have some aluminum barstock machined into a bushing to fit in the mustache bar? Its something I was considering, but I'm not sure I want to go that far for my daily driver, I'm starting to appreciate that quiet is our friend, quiet can = good.

 

Regards,

 

Lone

[DavyZ]

I think Terry has his solidly mounted?? At least that what I thought anyway.

 

Lone, you could produce that, but would it be really advantageous for the street? IMO it's just a bit too harsh. Maybe I'm just a softie or something (or I'm getting too accustomed to the Q45) but I would think urethane bushings and mounts would do nicely.

 

Davy

[blueovalz]

Without doing too much thinking on this yet, I would attempt to weld round steel plate (a big, thick washer may work here) onto the tops of the barrels at each end of the mustache bar. Then remove the studs that the mustache bar bushings slipped onto (they unscrew out of the subframe) and instead screw a bolt thru the welded on washer, and into the threaded hole that the stud came out of (I think they were like a 14mm fine thread, but can't be certain).