whatnow123 Posted October 11, 2014 Share Posted October 11, 2014 (edited) Hey Everyone!Has anyone figured out a decent way to limit the movement on the snout of the differential? I know about the pinion snubber and JTR (I think) way of wrapping a cable around it. The problem I'm having is on hard deceleration due to the larger U joint flange from the 280zx, it's hitting the swaybar. I thought about moving down the sway bar a bit but that doesn't really fix the problem and I don't want to go to a solid diff mount as I've heard the noise is just horrible. I also can't reverse mount the sway bar to the rear as I have a Camaro tank and that will get in the way. Anyone come up with a way to modify the stock mount or modifying a solid mount to accept urethane bushings to limit both up and down movement on front snout of the diff? Just an FYI, but I have a billet MS bar and urethane bushings there so I'm assuming that is limiting some movement already. Thanks in advance! Edited October 11, 2014 by whatnow123 Quote Link to comment Share on other sites More sharing options...
NewZed Posted October 11, 2014 Share Posted October 11, 2014 Plug all of the words below in to Google. The site's search engine is weak and won't find what you need. site:hybridz.org diff mount ron tyler 1 Quote Link to comment Share on other sites More sharing options...
Miles Posted October 11, 2014 Share Posted October 11, 2014 This is what I have used on two V8 240Z projects: http://www.thezstore.com/page/TZS/PROD/10-2296 Both cars driven daily for over ten years with no problems. The noise issue is exaggerated! There is no movement and there is very little increase in noise. Install it and move on to something else. Quote Link to comment Share on other sites More sharing options...
NewZed Posted October 11, 2014 Share Posted October 11, 2014 (edited) Why would you promote that over the RTZ style mount? The design is weaker -the diff still sits on the crossmember, the noise issue might be exaggerated but it's still more than the RTZ-style, plus the design flaw of stressing a very small area of the crossmember, possibly leading to fatigue cracking. Why take a chance? The OP's plans for the car would factor in. If he has a fairly noisy car maybe solid is easy. But if he has a quiet street cruiser the old diff howl could be a problem. If he's drag-racing, fatigue could be a problem. The RTZ-style just seems more logical. Edited October 11, 2014 by NewZed Quote Link to comment Share on other sites More sharing options...
Miles Posted October 11, 2014 Share Posted October 11, 2014 (edited) Are there any issues with the RTZ mount? If my solid mount ever has a problem I would look into the RTZ mount as long as it doesn't throw the driveline angles off. Also consider what Jeromio did: http://240z.jeromio.com/diffmount.html Edited October 12, 2014 by Miles Quote Link to comment Share on other sites More sharing options...
seattlejester Posted October 11, 2014 Share Posted October 11, 2014 Only problem with the RTZ mount is that depending on the place you buy it from and your year it may need slight modification (grinding off tabs in trans tunnel, drilling extra hole etc etc). Other then that I think it works great, and you can run another poly step bushing on the bottom mount to sandwich. I was told solid mounting the front and not solid mounting the rear is a big no-no. Quote Link to comment Share on other sites More sharing options...
NewZed Posted October 11, 2014 Share Posted October 11, 2014 That's a good point about the drive shaft angle. The design that people are copying is for a V8 swap and lowers the nose if used with the GM transmission mount. So it might have issues with the L6. Seems like somebody would seize the opportunity and tweak the design. If it's used as a snubber though, you keep the stock angle and stock mount, just avoiding the nose lift. So, no obvious solutions. They all have potential problems. Quote Link to comment Share on other sites More sharing options...
Domzs Posted October 11, 2014 Share Posted October 11, 2014 I installed RTZ diff mount after I completed my LS swap . It did change my drive shaft angle . Quote Link to comment Share on other sites More sharing options...
Miles Posted October 12, 2014 Share Posted October 12, 2014 (edited) seattlejester, on 11 Oct 2014 - 2:21 PM, said:seattlejester, on 11 Oct 2014 - 2:21 PM, said:Only problem with the RTZ mount is that depending on the place you buy it from and your year it may need slight modification (grinding off tabs in trans tunnel, drilling extra hole etc etc). Other then that I think it works great, and you can run another poly step bushing on the bottom mount to sandwich. I was told solid mounting the front and not solid mounting the rear is a big no-no. I had read that in several posts before I did the poly U bushings in the rear and the solid front mount. Some Z builders have welded additional stiffeners to the front cross member and added material where the nose bolts to the cross member. Search for some pictures of failed cross members. They tend to fatigue and crack along the sides of the mount I suspect that a few hard launches and/or burnouts in a V8 Z would trash the cross member when using the solid mount. I have been using stock cross members with the solid mount for years in both stock and V8 applications and haven't seen any stress cracks so far, but I don't abuse them either. Edited October 12, 2014 by Miles Quote Link to comment Share on other sites More sharing options...
takayuki Posted October 12, 2014 Share Posted October 12, 2014 this looks like a good option. I'm going to try it out myself http://www.swmotorsport.com.au/product_info.php?cPath=1&products_id=130 Quote Link to comment Share on other sites More sharing options...
Swami Posted October 12, 2014 Share Posted October 12, 2014 (edited) Noise issue is definitely exaggerated. I ran a solid aluminum diff mount for years and it barely registered in my mind. If your exhaust is any kind of loud, I would wager that a solid diff mount wouldn't bug you in the least. Edited October 12, 2014 by Swami Quote Link to comment Share on other sites More sharing options...
Miles Posted October 12, 2014 Share Posted October 12, 2014 From Jeromio's website: http://240z.jeromio.com/diffmount.html Quote Link to comment Share on other sites More sharing options...
Gareth. J. Posted October 12, 2014 Share Posted October 12, 2014 I now run the SW motorsport option on my R180. After repeated failures of my standard mount I went to the RT style mount but had vibration issues on track. I then switched to the SWM item, it's way over priced but is bullet proof, problem solved for good! It is cheaper if you provide a core but not by much. Quote Link to comment Share on other sites More sharing options...
Tony D Posted October 12, 2014 Share Posted October 12, 2014 Define "way overpriced"... Quote Link to comment Share on other sites More sharing options...
Nigel Posted October 12, 2014 Share Posted October 12, 2014 Had a solid mount in my '73 Z for one lap around the block and it came out. The gear whine was way too loud for my taste and my Z isn't exactly quiet. Glad I did because I've since seen pictures on this site of front cross members torn up from using these. Eventually switched to the RT mount with the Energy Suspension poly GM trans mount above and nothing below. There's an exhaust hanger bracket welded to the tunnel that people partially cut away to make the RT mount fit, but it only takes a bit of hammering to recess it enough that the RT mount fits fine. No point potentially weakening the bracket unnecessarily. I sanded the GM trans mount down to match the profile of the nose of the diff to apply the proper pre-load to the mount, and I shortened the supplied bolt that goes in from the top. it was a little too long and it was hitting the metal plate embedded into the poly. I suspect not sanding the mount and the too long bolt may be potential causes of the issues some people have had with this setup. I had no way of checking the drive shaft angle, But I have a 240SX 5 speed with the shorter driveshaft, and if drive shaft angle was an issue, this setup should have exaggerated it. However, I haven't had any driveline vibration issues. This has been my setup for the last 7 years behind an L28 turbo. It's held up fine through mixed use of drag, road course and street driving. So, overall the RT mount is one of the few things I'm content to leave as is. Nigel Quote Link to comment Share on other sites More sharing options...
Gareth. J. Posted October 13, 2014 Share Posted October 13, 2014 (edited) $460 IMO is too much, I am a Datsun owner after all. Hehe. I believe it's $380 if you ship them the crossmember. I guess if I had just bought this mount first up then I would have come out on top, but the car has changed a lot over a short time. On the other side I can't see it failing for a very very long time so, if you break it down over ten years it's not that much. I also ran the solid front mount and new urethane moustache bar rubbers. I did notice upon removal that it had deformed/mushroomed the bolt retaining hole Edited October 13, 2014 by Gareth. J. Quote Link to comment Share on other sites More sharing options...
Tony D Posted October 13, 2014 Share Posted October 13, 2014 I saw the site, don't forget we are "minus GST" as well! Welcome to Union Rates! Hahaha... Quote Link to comment Share on other sites More sharing options...
whatnow123 Posted October 14, 2014 Author Share Posted October 14, 2014 Does anyone have a decent photo of the SW Motorsport mount? It looks like that might be a good option.. Quote Link to comment Share on other sites More sharing options...
Gareth. J. Posted October 16, 2014 Share Posted October 16, 2014 Try searching on here for 'stuart Wilkins motorsport' I put some pics in an old thread called 'Aftermarket 280z front diff crossmember?' Sorry I cant seem to attach a link in here. Quote Link to comment Share on other sites More sharing options...
NewZed Posted October 16, 2014 Share Posted October 16, 2014 The link in Post #10 seems to work fine. Goes directly to a picture. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.