Permanent 4wd and series axles

Hello
What do i need to do to connect original series 2 axels to lt77/lt230 permanent 4wd gearbox and transfer box? I assume the rear axle will be ok but what about the front axle? Can you get constant velocity joints for series axles?

Any answers gratefully received...

More info needed, are you transplanting these Gear boxes into a S2 or ore you wanting to put S2 axles into something? I have never heard of CV joint mods for Series axles

If the rest of the vehicle is series then you need a front axle assy from a stage 1 V8 although I am not sure what diff ratio is as its a few years since I had one. HTSH

Current thinking is that for permanent 4wd you must have CV joints in the front axle, that means a stage 1 axle, you will have to change the diff, but 20 odd years ago plenty of people were putting the range rover engine & box in with the standard axle with no problems.

Hello everybody

thanks for the replys. The situation is that i have re chassised a series 2 and put in a tdi 200 with 5 speed lt77/230 gear/transfer box. I was then going to switch to defender axles (for disc brakes) but that means fitting wheel arch extensions - which i'm not keen to do. So i would like to keep the series axles and fit a disc upgrade (or lwb drums). However i understand that you cant run series axles in permenant 4wd as they wind up.

I dont know much (anything in fact) about stage 1 diffs/axles - would they be needed front and back? Are they expensive? Are they the same width as s2 axles?

cheers

Before you go and swap to many parts on a S2 you may want to read this.
http://www.landyzone.co.uk/lz/f38/exemption-vehicle-excise-duty-55330.html

Thanks Clivees

i'm keeping the original steering and suspension - and as long as you have a reciept from the manufacturer - the replacement chassis gains 5 points (total = 11). A welded or second hand chassis doesnt count. So that should keep the Q plates off (atleast thats what the local inspector told me).

Does anybody know if running FWH on 'Free' while on tarmac would stop wind up in permanent 4wd?

cheers

I thought that the non series transmissions had a center diff, so no problems?

You looking at the wrong problem. if you are using the 90 type transfer box, wind up will not be a problem, so Free Wheel Hubs won't help (in fact, they won't work!).
The problem is that Series front axles are designed to be used at low speed mainly on slippery ground, so have ordinary universal joints. These will give a lumpy feel when turning,and may not survive the constant use (failure could cause the wheel to lock up, not fun at speed).
Vehicles with driven front wheels, and that includes vehicles with permanent 4wd, have constant velocity joints to eliminate these problems. The Stage 1 axles falls into this category. Where you get them from is anybody's guess.

I thought that the non series transmissions had a center diff, so no problems?

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They do but the problem lies with the front axle, standard UJ are used (without the grease retaining seal) and can’t handle full lock for normal road driving. I also agree they won’t last

Davec said:

The problem is that Series front axles are designed to be used at low speed mainly on slippery ground,

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so yu is saying that anyone that fits a v8 into a series motor and does 90 in it can expect to blow the front axle to bits?

No Because it will be driving off the rear axle only unless 4WD is engaged.

but the axles are still turning - just not connected to the gearbox.

If FWH are fitted the front drive train wont be turning, without they will but wont be driving, If 4x4 is engaged there is no way for the front and rear axle to lose transmission wind up other than the wheel with the lowest grip will be forced to slip.

so, to summarise;

• series 2 front axle cannot be run on permanent 4wd
• there is nothing that can be done to change this (except get different axle ie stage 1)
• If you do run permanent 4wd on series axle the axle might disintegrate even with FWH on Free

er,... so even if i have my fwh set to free the front uj might disintegrate when being driven at high revs by the lt230 perm 4wd?

wheel arches it is then (you won't despise my s2 will you....?)

series 2 front axle cannot be run on permanent 4wd

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False yes they can, recommended on a low grip surface though, to prevent wind up.

there is nothing that can be done to change this (except get different axle ie stage 1)

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I think you sum it up

If you do run permanent 4wd on series axle the axle might disintegrate even with FWH on Free

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If you did this you would have to engage the diff lock using the non standard box I.E 90/10box+transfer. The S2 axles are old technology and won’t stand permanent use, well that’s my humble opinion

Rad said:

so, to summarise;

• series 2 front axle cannot be run on permanent 4wd
• see post 4. People have been doing it for years, but in theory not a good idea.
• there is nothing that can be done to change this (except get different axle ie stage 1)
• If you are worried about it.
• If you do run permanent 4wd on series axle the axle might disintegrate even with FWH on Free
• If you set the FWH to free with permanent 4wd the vehicle won't move, unless you lock the centre diff.

er,... so even if i have my fwh set to free the front uj might disintegrate when being driven at high revs by the lt230 perm 4wd?

wheel arches it is then (you won't despise my s2 will you....?)

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I suggest you do some searches on this site, and understand how the various features work, as you are obviously getting confused.
Personally I don't know what is wrong with a 2 1/4 and a 4 speed box.

Quote:
Originally Posted by Davec View Post
The problem is that Series front axles are designed to be used at low speed mainly on slippery ground,
so yu is saying that anyone that fits a v8 into a series motor and does 90 in it can expect to blow the front axle to bits?

Sorry MHM, perhaps I should have said that Series front axles are designed to be used to transmit drive at low speed maiinly on slippery ground.
As I said earlier, many people have been doing it for years
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k - just thought that statement was a bit naughty.

You could always attach the gearbox to a series transfer box.