bushings

[KirkgZ]

I have a 1973 240Z. What type of bushings hold the rear axle in, inside and outside? I am going to replace them and need some information, please

[panchovisa]

Might be a small problem with the terminology. Your Z doesn't have a rear axel, but it does have two halfshafts and a differential center section.

The halfshafts have universal joints at the inner (differential) side, and outer (strut/hub) side. Are these what you want to replace?

[dogma420]

These are the bushings:

Sway bar bushings (if you have a rear sway bar)

each triangle link has 2 bushings (4 each)

Mustache bar has bushings on each end (2 total)

Differential has a mount bushing right under it....also there's a strap going over the top of the diff--replace this if its original.

As far as rubber bushings, that is about it. Replace with oil impregnated polyurethane bushings for added stiffness.

There are 6 u joings, 2 on the driveline (which rarely go out because the driveline does not move other than rotate)....4 ujoints in the back, 2 per halfshaft.

Replace all of the above items, and your rig will drive much better if they are all stock originals.

***also replace the pivot bolts that connect your triangle links to the spindle (if that's what it is called)...they are normally completely corroded on an old Zed...this will help too.

[240ZX]

Lacy, Have you had a chance to purchase a factory shop manual on your Z yet? They have really nice exploded views of the systems within the Z. Anyway, in regards to your question...I think you are asking, what type of bushings are used in the rear suspension, as the rear drive axles are nothing more than telescopic driveshafts and are bolted to the differential and stub axle assemblies...right and left side. Now the stock bushings are a rubber compound and generally are shot due to age and wear. I think its safe to say that most people replace the old rubber units with modern day urethane bushings. They will certainly tighten up your suspension (minimise play) and last almost indefinitely. A complete urethane bushing kit (for the entire car)runs about $250.00 and is worth every penny of the price. They can be purchased from a number of sources as well...do a little searching here in the archives and on the NET....seek and you shall find! There are old posts that discuss the entire process oss removing the old ones and installing the new ones. The most difficult ones to deal with are the lower outer rear bushings, where the strut assembly attaches to the transverse link. The tappered locking bolt and spindal shaft tend to become rusted in place and require some words to God. Hope this post gets you pointed in the right direction.

[KirkgZ]

240ZX Thanks for the detailed response the information is much appreciated, I will mull over the info and act accordingly.

[nightowlZ]

i am looking to replace all of the bushings as well, any brand stand out above the rest?

[240ZX]

I'm not certain which kit is the best, or if one is better than another...but for sure, do use the provided bushing lube and use it liberally.....no lube = squeeking. I believe the kit I purchased and installed was from ENERGY SUSPENSION.

[sahunt66]

I'm interested in this subject too as I plan on replacing all my bushings this summer.

It's mentioned in this thread that info on the installation is on this site; that's great. The book, "How to Restore you Z" by Humble (I hope I have it right)... does the book have instructions on how to replace the bushings? I'd like to have it all in one place, in hand so that I can study it well before diving in.

Thanks

[240ZX]

Steve, You are correct about the title of the book...amd it is a good book. However, IIRC it does not provide all the specific details for rebuilding the Z, but is geared more toward guidance for a successful rebuild. Now of course there are some assumptions that should be addressed, such as having some level of mechanical apptitude and sufficient tools to exicute the rebuild. So, basically one would need to be capable of disassembling and reassembling the car as well as being able to deal with the usual issues that come up that deviate from the norm...like, how do I remove and deal with rusted and frozen fasteners. The only really tough area, when replacing bushings is at the rear control arms were they attach to the strut assembly...as it can be tough to disassemble, due to frozen rusty parts. There are also some tricks to reassembly when using the urethane bushings, as they are not as compliant as the rubber units and at the time of reassembly your hands are most certainly covered with that super slippery lube that is provided for lubing up the bushings. You will speak to God now and them...believe me! The specific area I am talking about is the reassembly of the rear control arm to the strut. The reassembly is much easier when you grind a slight relief on one side of the strut housing, were the bushing bear against the casting, otherwise you will be trying to force this slippery bushing over a machined sharp edge to get it in place. Just about all the other areas, for bushing replacement, are pretty straight forward. Damn, one coul;d write a book about this subject. But don't panic, it's been sucessfully done by many.

[xray]

If you like to follow pictures, the Eastern Canada Z Car club at www.atlanticz.ca has a wealth of info regarding bushing replacement. Check out their "tech tips" section. Between the FSM, Humble's book, that site and here most questions should be answered...

Yes, many conversations with the Almighty will occur, and be sure to use a torch to melt out the transverse link bushings--gets some of the frustration out, along with the bushing....

$0.02

Steve

[sahunt66]

As always, this site is a great resource! Thanks fellas.

Steve

[mdbrandy]

If you like to follow pictures, the Eastern Canada Z Car club at www.atlanticz.ca has a wealth of info regarding bushing replacement. Check out their "tech tips" section.

Great site! My front end is done, but I still have the rear to do...