Roving tracks CVs has anyone had experience

Quote:

---

Originally Posted by Red90

I was under the impression that these axle sets used a Toyota 27 spline for the CV inner. They were using the Longfield parts directly for the inner to keep the price down.

Attached is my comparison of various axles with strength comparison (solely based on polar modulus). I believe the Toyota splines use the same pitch, so are similar to the Dana spline strengths.

---

Quote:

---

Originally Posted by LowRanger

Just goes to show that you shouldn't believe everything you are told.
I have the axles and CV's here on the bench,and I can assure you they are 31 spline ;)

---

Pre 80 series cruiser and hilux the half shafts were 27 spline at the cv's and 30 spline at the diff.

Longfield had upgraded cv's with 27 splines or 30 spline, which allows stronger half shafts over the 27 spline version. They reduced the diameter of the balls to allow the increase to 30 spline.

IIRC:

Sam Overton (strangerover) started the axle and cv upgrade for rovers, when he had jacmac make halfshafts so modified toyota 27 spline cv's could be used with rover front axle assemblies, he also had the bronze bushes made for the conversion.

When longfield bought out the 30 spline version, Keith used them with 30/30 half shafts for the toy diff upgrade for rover axle assemblies.

These toyota cv's required minor mods to the rover spindles.

Keith later had cv's made with changes to the stub axles so they drop in without modifying the spindles, similar in that way to what Ashcroft cv's offered, but they were still 30 spline (not 31 spline), which allowed stronger half shafts compared to Ashcroft.

I'm inclined to think Wayne has had a memory lapse quoting 31 spline and it should instead be 30 spline. 31 spline is what Nissan use and is out of line with the others.

Quote:

---

Originally Posted by djam1

Wayne whats the quality like?
Very tempted to order a set but heard disparaging remarks about the quality!

---

I have the Cv's without the ABS rings,and the quality is first class.I run 35's and have given them a hard time and they are fine.I do make the proviso that you need to make sure that they are the correct type for your application,or you could have problems with fitment like Mark and others have had when trying to fit them to early 110's.I also have a couple of sets of Ashcroft CV's here and the finish is virtually identical,adding credence to the fact that they come out of the same factory.

Quote:

---

Originally Posted by Bush65

Pre 80 series cruiser and hilux the half shafts were 27 spline at the cv's and 30 spline at the diff.

Longfield had upgraded cv's with 27 splines or 30 spline, which allows stronger half shafts over the 27 spline version. They reduced the diameter of the balls to allow the increase to 30 spline.

IIRC:

Sam Overton (strangerover) started the axle and cv upgrade for rovers, when he had jacmac make halfshafts so modified toyota 27 spline cv's could be used with rover front axle assemblies, he also had the bronze bushes made for the conversion.

When longfield bought out the 30 spline version, Keith used them with 30/30 half shafts for the toy diff upgrade for rover axle assemblies.

These toyota cv's required minor mods to the rover spindles.

Keith later had cv's made with changes to the stub axles so they drop in without modifying the spindles, similar in that way to what Ashcroft cv's offered, but they were still 30 spline (not 31 spline), which allowed stronger half shafts compared to Ashcroft.

I'm inclined to think Wayne has had a memory lapse quoting 31 spline and it should instead be 30 spline. 31 spline is what Nissan use and is out of line with the others.

---

John
It wasn't a memory lapse,it was simple tiredness and miscounting 5 times.I have now extricated foot from mouth and edited a previous post to show the correct spline count at 30.

I case anyone is interested,here is a photo of the writing on the CV
https://www.aulro.com/afvb/images/im...013/12/515.jpg

As you can see,it is branded as Empi !!!

Quote:

---

Originally Posted by Red90

I was under the impression that these axle sets used a Toyota 27 spline for the CV inner. They were using the Longfield parts directly for the inner to keep the price down.

---

Hi John,

the early ones did.
The last incarnation went up to 30 if memory serves me well (so I'd better check), but I'm not sure, it's been a while...

I ran both (and I'm still running the latest type), I still have the old ones to check...

I don't know about these new ones L8 is selling, but it was a nice setup,
although "soft" and prone to clicking (and mine do it loud :( ).
I tried to "deburr" them, as someone suggested, but it made no difference, at least not in the long run.

Quote:

---

Originally Posted by Bush65

I'm inclined to think (...) it should instead be 30 spline. 31 spline is what Nissan use and is out of line with the others.

---

I'm inclined to think the same ^^^

Quote:

---

Originally Posted by Bush65

Pre 80 series cruiser and hilux the half shafts were 27 spline at the cv's and 30 spline at the diff.

Longfield had upgraded cv's with 27 splines or 30 spline, which allows stronger half shafts over the 27 spline version. They reduced the diameter of the balls to allow the increase to 30 spline.

IIRC:

Sam Overton (strangerover) started the axle and cv upgrade for rovers, when he had jacmac make halfshafts so modified toyota 27 spline cv's could be used with rover front axle assemblies, he also had the bronze bushes made for the conversion.

When longfield bought out the 30 spline version, Keith used them with 30/30 half shafts for the toy diff upgrade for rover axle assemblies.

These toyota cv's required minor mods to the rover spindles.

Keith later had cv's made with changes to the stub axles so they drop in without modifying the spindles, similar in that way to what Ashcroft cv's offered, but they were still 30 spline (not 31 spline), which allowed stronger half shafts compared to Ashcroft.

I'm inclined to think Wayne has had a memory lapse quoting 31 spline and it should instead be 30 spline. 31 spline is what Nissan use and is out of line with the others.

---

John, how is the Hi-lux CV stronger than a AEU2522? AFAIK, the balls, cage and star are interchangeable. Is it simply because of the input/output spline shaft size?

Quote:

---

Originally Posted by uninformed

John, how is the Hi-lux CV stronger than a AEU2522? AFAIK, the balls, cage and star are interchangeable. Is it simply because of the input/output spline shaft size?

---

Larger diameter stub shaft.

Stock cv's are made from a steel grade that is hard, in the heat treated state, to give a long wear life. The downside is brittleness that leads to breakage from impact loads.

Going back a good few years, Bobby Long started re-heat treating the hilux and early cruiser cv's to reduce the hardness and improve impact quality. He also welded a ring onto the bell to make it stronger when the balls were running near the edge on full steering lock.

You will no doubt remember that Sam started to do these modifications at Haultec.

With the popularity increasing sales, Bobby Long went to a manufacturer and had them make new cv's from materials that improved the strength/toughness even further and made some changes to the design so they were stronger on full steering lock.

You can't compare the strength of stock AEU2522 cv's to the tougher cv's.

Just as you can't compare the wear life, lower for the softer aftermarket cv's, as per Michele's post. Note the wear life of the aftermarket cv's is also reduced by their use of smaller balls, which results in an increase of the Hertzian contact stress.

Do the ashcroft CVs wear faster than stock CVs then?

Quote:

---

Originally Posted by Bush65

Larger diameter stub shaft.

Stock cv's are made from a steel grade that is hard, in the heat treated state, to give a long wear life. The downside is brittleness that leads to breakage from impact loads.

Going back a good few years, Bobby Long started re-heat treating the hilux and early cruiser cv's to reduce the hardness and improve impact quality. He also welded a ring onto the bell to make it stronger when the balls were running near the edge on full steering lock.

You will no doubt remember that Sam started to do these modifications at Haultec.

With the popularity increasing sales, Bobby Long went to a manufacturer and had them make new cv's from materials that improved the strength/toughness even further and made some changes to the design so they were stronger on full steering lock.

You can't compare the strength of stock AEU2522 cv's to the tougher cv's.

Just as you can't compare the wear life, lower for the softer aftermarket cv's, as per Michele's post. Note the wear life of the aftermarket cv's is also reduced by their use of smaller balls, which results in an increase of the Hertzian contact stress.

---

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.