pureZero Posted November 18, 2013 Share Posted November 18, 2013 The one on my car is cracked, and I am in need of a new one. Does anyone know where I may be able to procure a quality aftermarket part, or has no one thought to make them? Quote Link to comment Share on other sites More sharing options...
pureZero Posted November 18, 2013 Author Share Posted November 18, 2013 That is not my actual part, by the way, as mine is in much better shape, but it's still on its last legs. Quote Link to comment Share on other sites More sharing options...
johnc Posted November 19, 2013 Share Posted November 19, 2013 Get rid of your solid front diff mount. Weld up the one you have. Quote Link to comment Share on other sites More sharing options...
pureZero Posted November 20, 2013 Author Share Posted November 20, 2013 Are you saying I should get rid of the one in the picture? I got that picture off of Google. The cracks on mine are on the ends around where the lower control arms are held in. I would weld it, or have someone weld it, but my welding instructor (who is an ex-body/mechanical repair tech) was very clear on not welding it if I don't absolutely have to. I was a little skittish about going to town on it with a welder to begin with, knowing how much of a vital part it is. You wouldn't happen to know if it was ever heat treated, would you? Keep in mind, whatever goes back in there will eventually need to handle around 400 hp... Quote Link to comment Share on other sites More sharing options...
Gareth. J. Posted November 20, 2013 Share Posted November 20, 2013 (edited) "Keep in mind, whatever goes back in there will eventually need to handle around 400 hp..." If your handy with a welder you could make up something like this. I switched to this after having vibration problems with an RT style mount. It's available from stuart Wilkins motorsport in Australia, not cheap though. Edited November 20, 2013 by Gareth. J. Quote Link to comment Share on other sites More sharing options...
z240 Posted November 20, 2013 Share Posted November 20, 2013 Well that's a nifty idea. Put the isolator inside the cross member (looks suspicisously like a control arm bushing) instead in the diff mount, and get positive capture at the same time. Might be tempted to use a poly bushing. Hardest part might be finding/making tubing with the right ID to fit the bushing you choose. Quote Link to comment Share on other sites More sharing options...
pureZero Posted November 23, 2013 Author Share Posted November 23, 2013 "Keep in mind, whatever goes back in there will eventually need to handle around 400 hp..." If your handy with a welder you could make up something like this. I switched to this after having vibration problems with an RT style mount. It's available from stuart Wilkins motorsport in Australia, not cheap though. So... $460 is doable, later on. I'm looking for something a little newer, though. But yeah, that isn't too bad. Quote Link to comment Share on other sites More sharing options...
NewZed Posted November 23, 2013 Share Posted November 23, 2013 (edited) The OP should do a little more work on determining the cause of the cracks. Strengthening the inner diff mounts won't help the outer contact points. The outer cross member mounting points have the leverage advantage over the inner diff mounting points. Probably be just fine with a stock replacement cross member. Edited November 23, 2013 by NewZed Quote Link to comment Share on other sites More sharing options...
pureZero Posted November 23, 2013 Author Share Posted November 23, 2013 The OP should do a little more work on determining the cause of the cracks. Strengthening the inner diff mounts won't help the outer contact points. The outer cross member mounting points have the leverage advantage over the inner diff mounting points. Probably be just fine with a stock replacement cross member. The cracks seem to have been caused by worn control arm bushings. The cracking is right between the bolts, on the outer edges. I'll try getting a picture of them. I would rather not try welding on it if I do not absolutely have to. Wish there was a new aftermarket part out there somewhere... Quote Link to comment Share on other sites More sharing options...
NewZed Posted November 23, 2013 Share Posted November 23, 2013 That was my guess also. A stock cross member with new bushings and you should be golden. There's no aftermarket part because there's no demand. Nobody would buy them. Quote Link to comment Share on other sites More sharing options...
pureZero Posted November 23, 2013 Author Share Posted November 23, 2013 Yeah, the worn bushings caused a bit of erosion as well. Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted November 23, 2013 Share Posted November 23, 2013 There is a billet crossmember on eBay if you want to go that way. Quote Link to comment Share on other sites More sharing options...
NewZed Posted November 23, 2013 Share Posted November 23, 2013 Dang, I knew that one would show up if I said they didn't exist... Quote Link to comment Share on other sites More sharing options...
pureZero Posted November 23, 2013 Author Share Posted November 23, 2013 There is a billet crossmember on eBay if you want to go that way. I think I saw that on there... Seems fishy to me, but I would be interested to see how much that thing could actually handle... Off the car. Quote Link to comment Share on other sites More sharing options...
NewZed Posted November 23, 2013 Share Posted November 23, 2013 http://www.ebay.com/itm/Datsun-Z-240Z-260Z-280Z-New-Bracket-Brace-Differential-Nose-Support-Bar-69-78-/151170316498?pt=Motors_Car_Truck_Parts_Accessories&hash=item233273f8d2&vxp=mtr Don't really see any benefits over stock. But there it is. In retrospect I do remember seeing this, and noting that it is sold by DatsunPartsLLC, a guy of suspect credentials in the Z car field. But he has a lot of parts for sale. Quote Link to comment Share on other sites More sharing options...
pureZero Posted November 23, 2013 Author Share Posted November 23, 2013 I think I saw a different one on there last time... That one seems to be... Decent. Quote Link to comment Share on other sites More sharing options...
pureZero Posted December 5, 2013 Author Share Posted December 5, 2013 Someone finally pointed me to this: http://www.ebay.com/itm/Datsun-Z-240Z-260Z-280Z-New-Bracket-Brace-Differential-Nose-Support-Bar-69-78-/151170316498?pt=Motors_Car_Truck_Parts_Accessories&hash=item233273f8d2&vxp=mtr I won't be buying it from datsunpartsllc (who is the seller...), as I was supplied with the number of Juan from Krecs Engineering, who supposedly makes the part. That's if I do buy it. Quote Link to comment Share on other sites More sharing options...
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