7677243 Posted February 12, 2015 Share Posted February 12, 2015 Hey guys, I am in the process of rebuilding my rear end and have come across a question on the mounts for the rear diff before I place the next order.. Can someone confirm if/what are the differences in the rear diff bushes between the Auto and 6 speed (the ones pressed into rear of the rear sub frame) I found these part numbers for the Auto: Left bush: 4165114020 Right bush: 4165124020 6 speed: Left bush: 4165114010 Right bush: 4165114020 I am building a fast Road/Limited track car so Solid would be out of the question due to noise I assume. My vendor has some for the 6-speed but my car is an auto. Cheers Quote Link to comment Share on other sites More sharing options...
Nodalmighty Posted February 12, 2015 Share Posted February 12, 2015 My old Mk3 had a solid mounted engine. box and diff and it wasn't to bad. Quote Link to comment Share on other sites More sharing options...
Guest Sparkyyyyy Posted February 12, 2015 Share Posted February 12, 2015 (edited) It would be good to hear from others who have installed solid bushes. I was considering fitting polys on the ears and solids on the rear but was cautious about making the ride too noisy. Any views? Cheers My phone seems to have a different username. I am the op, I'll sort out accounts tonight. Edited February 12, 2015 by Sparkyyyyy To verify I am OP (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 12, 2015 Share Posted February 12, 2015 If you fit solid at one "end" of the diff casing, you must fit solid at both. Otherwise it's effectively only constrained by half the mounts. I'd just fit the manual bushes *IF THEY ARE STILL AVAILABLE* I think some are now obsolete and no longer available. plus the subframe ones can be a PITA to remove and fit without dropping the frame and making special tooling. Quote Link to comment Share on other sites More sharing options...
Guest Sparkyyyyy Posted February 12, 2015 Share Posted February 12, 2015 Hey Chris, cheers for the reply and clearing that up for me. Fortunately the sub frame is out and being stitch welded and tidied up so removal won't be bad. I think I found a source in aussieland for the stock rears. I will leave link to source once confirmed. Would it be noticeably noisier with all solid diff mounts and stock sub frame mounts? Cheers for your time Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 12, 2015 Share Posted February 12, 2015 Probably not much, but it will transfer more shock loads up the drivetrain. Definitely NOT a good mod if you have an overstretched N/A manual gearbox, probably OK with a Getrag. For a drag car it may help stop wheel hop. For a road / track car it probably won't make much difference. Time and money could probably be spent more effectively elsewhere. Quote Link to comment Share on other sites More sharing options...
Guest Sparkyyyyy Posted February 12, 2015 Share Posted February 12, 2015 Thanks mate, that clears a lot of questions up for me. On a final note the bushes on the ears of the diff are shot so need changing anyway. would poly ears and stock rears work and while it is all out, any reason to install the second rear different mount that Toyota leave off the autos? The car is a stroked na-t running 450 at the wheels but will be pushed higher once everything else is well sorted. Thanks again mate! Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 12, 2015 Share Posted February 12, 2015 Poly bushes will probably be your only option, I'm pretty sure Toyota no longer keep the ear bushes. One secret to keeping an N/A manual box intact is run a clutch with as little clamp pressure as you can get away with. Brutal high torque clutches will jsut lock and transmit huge loads through the g/box. ones that are a bit marginal will slip a bit and help protect the gear teeth. You arfe already sailing close to the wind! Quote Link to comment Share on other sites More sharing options...
s-u-p-r-a Posted February 12, 2015 Share Posted February 12, 2015 Strange how this thread came up as I'm looking to source the poly bushes rather than solid but can you recommend anywhere to get them as I can't find anywhere Sorry to hijack thread Quote Link to comment Share on other sites More sharing options...
Guest Sparkyyyyy Posted February 12, 2015 Share Posted February 12, 2015 I was going to pick them up from garage whifbitz or eBay, same price from both unless there is a forum sponsor who supplies them.. Quote Link to comment Share on other sites More sharing options...
s-u-p-r-a Posted February 13, 2015 Share Posted February 13, 2015 didnt relise whifbitz did the poly bushes for the diff, i only see solid mounts im going blind lol Quote Link to comment Share on other sites More sharing options...
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