Thread: D2 Diff into a RRC

Another idea is to run a strange 9inch front, either in the rover housing or in an LRA Rover9 housing allowing the use of the Competition 35spl ARB 9 locker, 35/30 spl hitough axles to 30spl Longfelid CVs and 30spl 10bolt hi tough flanges.

Or 9 centre with Series balls and 101 CVs (or longfields of similar size and an off the shelf Disk brake conversion kit,

Has anyone got more info on fitting series balls to a coil rover housing, or would it be easier to use a series housing and do a disk conversion f the series balls cant be bolted onyo the coiler housing? With this combo i believe you could tun 35spline front right through??

Apparently Maxidrive used to supply the series balls modded and used them in his rear portal steering. More info i found online below
"The only LR swivel larger than a series is the FC101 swivel, but unfortunately it is welded on to the axle housing.Maxi-Drive used to make new swivels from a solid block of 4340 that are series-sized on the outside, but large enough to fit a 101 CV. The FC101 CV is about twice the size of a normal land rover CV though."

More info here
http://www.landroverclub.net/Club/HT...l_steering.htm


Can it be that easy to get full 35spline in the front, am i missing something?

Also came across this info on GBR rovers and they seem to do diff spline conversions, have requested more info..will be interesting to compare to what Jac Mac can do.


http://gbrutah.com/product-catalog/c...tial-carriers/

At this stage its looking like the following in the stock RRC front housing

Off the shelf 30 spline side gears on an ARB or TJM prolocker and pegged Ashcroft CW&P
30spline Hi Tough Axles
30/30 Toyota longfeilds
30spline 10bolt Hi Tough Flanges

Other option is to use a 9" 31 or 35 spline centre in the rover housing (can be done) then go to 30spline on the outer, i just dont think going to the 9 on the front will be needed over all the 30spline gear as above.

I still see the cw&p as the weak spot, even with 24 spline gear.

Originally Posted by Vern

I still see the cw&p as the weak spot, even with 24 spline gear.

Thanks for that, Just like to know what data you are basing this on as ive heard as long as its pegged and 35s should be fine.

We are also running stock or near stock ratios in the diffs due to 6speed auto having low enough gearing built in in the lower gears, small Rover CW&P are stronger than the lower ratio ones with more teeth, its also pegged.

Less teeth means bigger teeth

From Ashcroft Website

3.50 ratio, with a tooth count of 28/8(see photo below)

3.75 ratio, with a tooth count of 30/8

4.12 ratio, with a tooth count of 33/8

4.37 ratio, with a tooth count of 35/8

4.75 ratio, with a tooth count of 38/8

All have a 8 tooth pinion, this is relatively low, ie the rover 3.54 has 13 teeth, you can achieve the same ratio with different tooth configurations, the stock 3.54 ratio is 46/13, our 3.5 ratio is 28/8, pretty much the same ratio but achieved with fewer, but wider teeth, the advantage being the wider teeth are able to absorb higher shock loading

Reverse Cut

All the above 5 ratios are now offered in both the normal rear directional cut and reverse cut for the front so unlike the incorrect stock rover design you are now driving on the stronger drive side of the gear in the front axle

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uploadfromtaptalk1468969727245.jpg

Just from all the reading i have done over the many years, cw&p is generally the first to fail, not sure on the hd gears though, but i did notice when i installed mine due to the teeth size, the cw is a fair bit thinner, I run the ashcroft hd 3.5 in the front. I still think a jacmac hypoid which uses toyota cw&p is a better option, if using aftermarket gearset. Just not sure if they come in the ratios you want.

Originally Posted by Vern

Just from all the reading i have done over the many years, cw&p is generally the first to fail, not sure on the hd gears though, but i did notice when i installed mine due to the teeth size, the cw is a fair bit thinner, I run the ashcroft hd 3.5 in the front. I still think a jacmac hypoid which uses toyota cw&p is a better option, if using aftermarket gearset. Just not sure if they come in the ratios you want.

Yes but they usually quite a low ratio and not pegged..the toyota front does have a rep for exploding in real world 4x4 situations that involve weight of the vehichle on the front axle and reversing, they are biased toward strength going forward which doesnt sit well with me personally but may be fine with others if they keep it in mind on the tracks.

I have heard the 9 can actually be installed in a Rover Housing twice in the last week, a strange 9 in 35 or 31 spline then 30 spline on the outers is another option that keeps the rover coiler housing and doesn't seem to have any downsides.

The question is is the front Rover ARB or TJM Locker with pegged stock ratio CW&P strong enough when matched to 30spline Hi Tpugh axles and longfields?

It sounds strong, but you really cant find many examples of it being done before.

The toyota hypoid doesn't run 80series front gears, from memory hilux 8" gearset.
To be honest i think the ashcroft gears will be fine, i just want to see you build a 9" in rover housing😎