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Has anyone uprated the rear axles to CV joints?

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Re: alana

You can get a new chassis - there is a place in NY does them now starting around $3k.

One other option comes to mind - we could try to get a discount with a group buy. If it comes in at 1500-1700ish here then I'm in.

I can send them an email tomorrow - if anyone else is interested PM me.
 
Re: alana

Well actually they're not that far off right now. Two assemblies without VAT comes out to ÂŁ968.42 or roughly $1700.00. Figure around $150 for shipping. How much would the import duty be????

If a group buy is in the works... possibly the guys at 6-pack would be interested too.
 
Re: alana

I'll find out the price first. Import duties (and I'm no expert mind) can be a killer though from what I've heard.

If anyone has an import export business and can chime in here (or better yet expedite things) I'm all ears...
 
HUBS

And one final thing before I stop posting for the night.

There is a concurrent thread on 6pack. The response there looks promising.

I sent the guy a pm. If he responds I'll post the details. If he's reading this (and I hope he is) then if we're lucky he'll chime in.
 
Re: alana

With all this talk of CV joints I thought I might contribute as well. I spoke to a gentleman at constant velocity of Ocala. https://www.cvaxles.com/index.html

He has done CV joints for TR6's in the past and thought he might even have the specs for it still. He quoted me 300-500 per CV Axle and once I send him my axles he would be able to give me a finite estimate. He said he used as many off the shelf parts as possible to keep the cost down.

I didn't think about having the CV joints replace the hubs, (why I have no idea)but I doubt he would have a problem with this. I am still in the sheet metal restoration phase which is why I have not pursued this further, but definetly will. If there is enough demand I will call him back and inquire further, now.

Lastly, I have a question. I know the TR hubs are prone to failure when pushed hard. Can someone explain where and how they fail, just trying to understand the problem fully so the best solution can be attained.

Thanks
 
Re: alana

crj7driver,
I'm no engineer nor have I experienced rear hub failure, but I have seen the results in video and photo footage. My guess is that the rear hub bearings fail or sieze and the resulting shock to the spinning wheel snaps the stub axle and the rear wheel departs the vehicle. check out the video at: https://www.tonydrews.com/Jack_Car_2.htm

Another potential issue is the mounting points of the rear hub to the trailing arm. The hubs are secured by six fine thread studs which are mounted in the soft aluminum trailing arm housing. I know some enthusiasts convert these mounts to coarse thread and may even increase the size of the mounting studs.
 
Re: alana

If someone buys an axle. There is a BMW specialist on the road into Road Atlanta. He could possibly identify the parts that are sourced.
 
Re: alana

I am in favor a moss copy or a reduced price on a group buy-(if Possible), the moss is a complete package, bolt in and looks the best. with a rough guess I would say it would cost about $650 an axle to have one made--that would include parts, materials, labor and profit. If we got 20 of us to buy one moss set up that would be about $50 each. Mabey we need to start a new post to see who would be in on this?
 
Re: alana

tr:
You may want to post the website as a separate post. It is incredible to say the least. All kinds of information about flow testing, even how to build a flow bench for around $300.

But the actual cockpit recording of an axel failure at speed is a must for all.

I wish Tony was doing the same type of flow work and parts development for the TR6.
 
Re: alana

[ QUOTE ]
The web site https://www.hottr6.com/triumph/tr6drivetrain.html
states
"This has issues with rendering the wheels to be no-longer hub-centric, but that will be covered somewhere else."
Since the web page was kind enough not to provide any e-mail contact information I was hoping that someone would explain what it means.
Thanks

[/ QUOTE ]

Hey Lee, good to see you here! That's Shane Ingate's website, and I think what he was referring to is by installing the ALFIN drums they use up the stock hub landing - thus rendering it no longer hub-centric

At the bottom of the main page is this contact info if you want to write him:

(hottr6 at hotmail dot com)
 
I realize I am a neophyte when it comes to all this but I have a question re converting to CV Joints.

What is the reason for wanting to do this??
 
The rear hubs are a known weak spot on these cars.

They have a habit of self destructing if you try to put more than 200hp through them (many would argue less), and that's in good condition. If they fail, you'll probably see your wheel going past you...

If you are going to upgrade your engine, this is one of those areas that needs attention before you start bolting on extra carbs or superchargers. At the very least make sure the end float is right, there is no play, all the bolts into the swingarms are threaded and your u-joints are in good condition.

The splined halfshafts and the U joints are prone to wearing which causes them to bind. CV joints and uprated hubs will (one hopes) fix all of these problems in a simple, modern bolt-on solution.
 
Re: CV Joint up-date

Ok I have an update on this - maybe.

I contacted a guy in the US that builds custom CV jointed axles. He seems to think that it's a fairly straightforward job to build one of these things.

First estimate is around $500 per axle, but I have to confirm exactly what this will give. It may be that we have to reuse the outer bearing carrier (part 90 on the moss diagram). I'm sorting out the details with him by email, so this might be a little premature, but it certainly sounds promising.

I'll post the full details when I have them.
 
Re: CV Joint up-date

Odd - I thought it was the inner and at the U joint where they went. I saw a picture of one online, but of course can't find it now.
 
Re: CV Joint up-date

Its the outer hub that goes and is dangerous, but the u-joints and splines always become a problem (for high performance anyway), We need the whole thing --like the moss unit.
 
Re: CV Joint up-date

We're discussing two separate issues here - the CV joint axles are to cure the infamous "Triumph Twitch" and to allow higher levels of HP to be used. The outer hub has a weakness that causes it to fail under certain racing conditions, but I've been told on the street they should be fine. I too would be interested in a product that would improve either or both of these weak areas.
 
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