Thread: Roving tracks CVs has anyone had experience

Originally Posted by Red90

You are probably thinking of the rear axles that they made (when they were in business). These were not made by RCV and had little to do with the front axle/CV kits. The front axle/CV kits were built in conjunction Longfield. They used the same design as the Toyota CV joints with machining changes to fit the Rover axles and all produced by RCV. The rear axles were made somewhere else and were not chrome-moly and not wasted.

I thought all of keiths axles where 4340?

No other than these front sets made in conjunction with Longfield and the Toy front conversions also made with Longfield. His other axles were 1541H that he had made somewhere else, Moser, I think.

Am I missing something here or is there a significant increase in strength at the CV end of the axle.
Surely there wouldn't be that much difference between the 32 spline maxi drive axle and the 31 spline ??

Originally Posted by djam1

Am I missing something here or is there a significant increase in strength at the CV end of the axle.
Surely there wouldn't be that much difference between the 32 spline maxi drive axle and the 31 spline ??

I think you are missing the specification about the size (DP or module) of the splines. They are vastly different, the 32 spline being very inferior.

Originally Posted by Red90

The new ones added the ABS rings. They are all made by RCV in the US, just like the Ashcroft ones are.

so the same product?

Originally Posted by djam1

Am I missing something here or is there a significant increase in strength at the CV end of the axle.
Surely there wouldn't be that much difference between the 32 spline maxi drive axle and the 31 spline ??

As John says - the spline count doesn't tell you diameter.

e.g. Landrover spline counts and diameters are:

1.1" OD 10-spline (most series)
1.24" OD 24-spline (most coilers)

1.0" OD 32-spline (defender CV inner)

1.47" OD 21-spline (FC 101)

Toyota use a 1.3" OD 30-spline which some of Keith's early products used. To make life complex Dana have a 1.3" 30-spline as well, however it has a different pressure angle - so they are not interchangeable and not the same strength even when made from the same material.

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.

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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.

Just went out and checked the axle and CV's for the sixth time,and now I need to remove my foot from my mouth.I counted the splines 5 time the other day and counted 31 every time.Today I have counted again and have come up with 30 splines