Lost 4 wheel drive

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Hello, I seem to have lost drive in my front wheels on my f78. eny ideas please?

Is the green 4x4 light

Is the green 4x4 light coming on and can you hear the box engage when you push the button. If it is then check your free wheeling hubs are locking as these usually pack up leaving the 4x4 not working

lost 4 wheel drive

Hi, Ive had it on axle stands today, to find that its my passanger side hub. So i had a look inside. I beleve that it is the brake spring thats bust. I think one of the lugs on the spring has snaped, but i dont know if it has because i dont know what it is suposed to look like. If it is that where do i get one from?
Enyone Know what im trying to explan if so please get back to me.

odds are if its snapped then

odds are if its snapped then its because the hub failed in some way. It's expensive but Milners do a manual hub conversion for about £150. I've just done this as mine failed just before the most recent snow and believe me that was frustrating having as fourtrack and struggling on snow

lost 4 wheel drive

Hello, Ive got the hub off. It does lock but it is very stiff. Should it be stiff or should it turn quite easy?
Im of to the scrapy now to see what i can get.
I found out something was wrong when i went off road with my brother (range rover driver) and a mate to be shown up greatly when i couldent tackle a simple hill.

lost 4 wheel drive

Problem solved, It just needed a few taps with a hammer and some wd40 then alot of grease. Alls working now.
Thanks guys.