Roving tracks CVs has anyone had experience

**Bush65** · 14th December 2013, 01:38 PM

Originally Posted by uninformed

I thought Longfield, and therefore those following, went back to standard size balls due to what you said (Hertzian contact stress) I believe he went to smaller balls to increase the material thickness in the bell. For its thinest part, even 1mm on radius would be a increase in strength, and I know that a 2mm bigger CV would have fit in the Rover housings. Not sure on the Toyota stuff.

Perhaps so. I stopped following this stuff after changing to 80 series Longfield cv's and part time 4x4.

Even with standard balls the softer material (4340 and 300M) will still wear more than harder stock cv's.

**dero** · 1st January 2014, 10:37 PM

Could one of you knowledgeable gents please simplify this for me .
I have a 97 130 Defender converted to Hitough axels & AEU2522 CV;s , is there a quality CV other than Ashcroft at a more reasonable price ?

**Deefa** · 1st January 2014, 10:53 PM

Originally Posted by dero

Could one of you knowledgeable gents please simplify this for me .
I have a 97 130 Defender converted to Hitough axels & AEU2522 CV;s , is there a quality CV other than Ashcroft at a more reasonable price ?

Basically thats the question i first asked at the very beginning of this thread and its turned into a lesson in molecular engineering!

**LowRanger** · 1st January 2014, 10:55 PM

Originally Posted by dero

Could one of you knowledgeable gents please simplify this for me .
I have a 97 130 Defender converted to Hitough axels & AEU2522 CV;s , is there a quality CV other than Ashcroft at a more reasonable price ?

The simple answer is NO

**Bush65** · 2nd January 2014, 06:19 AM

Originally Posted by dero

Could one of you knowledgeable gents please simplify this for me .
I have a 97 130 Defender converted to Hitough axels & AEU2522 CV;s , is there a quality CV other than Ashcroft at a more reasonable price ?

There is nothing wrong with the quality of genuine stock AEU2522 cv's. They are stronger than the later cv's used by Land Rover, and allow stronger half shafts.

Ashcroft replacements are not better quality, they are designed and manufactured to increase the strength, at the cost of some reduction in wear life.

Some people will break stock AEU2522 cv's often enough that they benefit from the stronger replacements. Often those same people don't clock up large km's so wear doesn't concern them.

Some of the cheap, non genuine, replacements for the AEU2522 have a higher failure rate.

**steveG** · 2nd January 2014, 07:38 AM

Originally Posted by Bush65

There is nothing wrong with the quality of genuine stock AEU2522 cv's. They are stronger than the later cv's used by Land Rover, and allow stronger half shafts.

Ashcroft replacements are not better quality, they are designed and manufactured to increase the strength, at the cost of some reduction in wear life.

Some people will break stock AEU2522 cv's often enough that they benefit from the stronger replacements. Often those same people don't clock up large km's so wear doesn't concern them.

Some of the cheap, non genuine, replacements for the AEU2522 have a higher failure rate.

My previous understanding was that genuine AEU2522's were no longer available, but I've just had a look and they seem to be pretty easy to get from the UK, albeit prices vary wildly. First couple I found were GBP150 each at Devon4x4, and GBP511 each at LRSeries

Ashcroft at GBP425/pair aren't unreasonably priced in comparison.
Non-genuine at $100 each locally on ebay.

Steve

**Vern** · 2nd January 2014, 07:44 AM

Are the genuine ones made by gkn? I recall reading that the gkn ones were the best stock cv, may have been on outers and may have been from Keith himself. Keith sent me some cryo'd gkn's to try, says they are stronger but not of the strength of long fields/ashcrofts

**djam1** · 2nd January 2014, 10:42 AM

If only it were possible to do business with these guys
Emails seem to be ignored and the website won't allow you to pay for the additional freight to Australia
Really frustrating

**uninformed** · 2nd January 2014, 11:50 AM

AFAIK, the original AEU2522 were made by GKN and no longer are.

**Bush65** · 2nd January 2014, 12:10 PM

Originally Posted by Vern

Are the genuine ones made by gkn? I recall reading that the gkn ones were the best stock cv, may have been on outers and may have been from Keith himself. Keith sent me some cryo'd gkn's to try, says they are stronger but not of the strength of long fields/ashcrofts

Correct.

Stock cv's have a high tensile strength, which makes the static load capacity high. I don't know for sure, but they could be stronger than aftermarket cv's.

Tensile strength is related to hardness. But brittleness increases with higher hardness.

And it is shock loading that breaks cv's. This is where the aftermarket Longfields and Ashcroft have an advantage. They use material that has high impact energy properties with high hardness.

But they can't be hardened to as high a value as the high carbon steels stock cv's are made from.

There are even better materials for high impact and hardness, readily available, that will produce far stronger cv's, but no one has used them yet. They stick with what they understand, developed from axle upgrades, isolated from technology for high impact applications.

To market cv's it is only necessary to describe them as "chrome moly and 300M" so the cool peeps understand (not!).

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