WARNING L405 OWNERS
Discussion
I have had to replace the transfer box on my L405. I paid £2.5K at an Indie but would have cost £5K at dealer. The reason for the failure was due to me changing wheels. Although the wheel I changed to is a smaller wheel but with the recommended LR size wheel the diameter is different to the original wheels. The car was set up to the original wheel diameter and by changing to a different diameter resulted in the failure of the transfer box. Apparently it doesn't take much of a discrepancy in diameter for this to happen. So if you change you wheels get LR or a LR specialist to do it for you and change the set up diameter.
Sorry to hear of your woes, but I'm sorry I call bull on this.
If you change all four wheels and tyres at the same time, then the worst thing that is going to happen is your speedo is going to be slightly out. The rolling diameter will change by such a minuscule amount (I can't bothered to work it out) that your gearing all round will drop slightly.
My Sport has been rolling around on 22" wheels for tens of thousands of miles without issue at all. What sort of 'set up' is the specialist or dealer supposed to do?
The only way the problem you describe could possibly manifest itself is if you had different diameter wheels front to rear or side to side or both. And for a considerable period of time. Not just a ten mile get you home after a puncture scenario.
If you change all four wheels and tyres at the same time, then the worst thing that is going to happen is your speedo is going to be slightly out. The rolling diameter will change by such a minuscule amount (I can't bothered to work it out) that your gearing all round will drop slightly.
My Sport has been rolling around on 22" wheels for tens of thousands of miles without issue at all. What sort of 'set up' is the specialist or dealer supposed to do?
The only way the problem you describe could possibly manifest itself is if you had different diameter wheels front to rear or side to side or both. And for a considerable period of time. Not just a ten mile get you home after a puncture scenario.
The BMW transfer box problems tend to be caused by staggered wheels (wider rears) and then owners not using OEM spec tyres. The resultant difference in rolling radius front to back screws up the transfer box.
I have 20" summer wheels, 18" winter wheels and 17" off-road wheels - which I swap between dependent on conditions and need. The staggered wheels have BMW approved tyres and the others have the same brand and wear all round. Nearly 80k miles on it and all's well so far.
I have never seen or heard of the capability to 'adjust' a transfer box to suit tyre size on any vehicle.
I have 20" summer wheels, 18" winter wheels and 17" off-road wheels - which I swap between dependent on conditions and need. The staggered wheels have BMW approved tyres and the others have the same brand and wear all round. Nearly 80k miles on it and all's well so far.
I have never seen or heard of the capability to 'adjust' a transfer box to suit tyre size on any vehicle.
Ranger 6 said:
The BMW transfer box problems tend to be caused by staggered wheels (wider rears) and then owners not using OEM spec tyres. The resultant difference in rolling radius front to back screws up the transfer box.
I have 20" summer wheels, 18" winter wheels and 17" off-road wheels - which I swap between dependent on conditions and need. The staggered wheels have BMW approved tyres and the others have the same brand and wear all round. Nearly 80k miles on it and all's well so far.
I have never seen or heard of the capability to 'adjust' a transfer box to suit tyre size on any vehicle.
This is what my LR specialist told me so you would think that they would know.I have 20" summer wheels, 18" winter wheels and 17" off-road wheels - which I swap between dependent on conditions and need. The staggered wheels have BMW approved tyres and the others have the same brand and wear all round. Nearly 80k miles on it and all's well so far.
I have never seen or heard of the capability to 'adjust' a transfer box to suit tyre size on any vehicle.
My original 22 inch wheels and tyres were LR spec. The new 20 inch alloys were LR spec for the L405 but the tyres although the same size as the LR spec weren't the same type, they are Grabber AT3's which I suspect are a greater circumference due to the tread and the fact that they now rub slightly sometimes when on full lock.
Edited by Jonny TVR on Wednesday 18th April 09:43
The purpose of the centre diff in the transfer box is to cope with the inevitable slight differences in rotation speed between axles due to uneven tyre wear. road surfaces, etc.
My best guess is that your transfer box was on the way out anyway, and changing wheels coincidentally changed the the bias between axles so the planet gears had to tun in the opposite direction to whatever they'd been used to. You'd get the same effect swapping wheels front to back. Somehow the direction change exacerbated some preexisting problem...?
My best guess is that your transfer box was on the way out anyway, and changing wheels coincidentally changed the the bias between axles so the planet gears had to tun in the opposite direction to whatever they'd been used to. You'd get the same effect swapping wheels front to back. Somehow the direction change exacerbated some preexisting problem...?
Sounds to me its a case of Transfer case judder. Land Rover are aware of this issue and it requires a double flush of transfer box oil to fix.
Many people report a slight knock/judder on half lock when the car reaches the 30,000 mile mark. Quote TSB LTB00906v5 it should be done asap if you notice any slight judder or the result will be the same as OP,Main dealer cost to have this done is around £150,thats if they charge you at all,it should be done under warranty, also they now use a different oil to stop this happening in the future.I strongly recommend getting front and rear diff oil changed every 30000 miles,that will set you back around £120 all in at a main dealer as well.Hope this helps and good luck
Many people report a slight knock/judder on half lock when the car reaches the 30,000 mile mark. Quote TSB LTB00906v5 it should be done asap if you notice any slight judder or the result will be the same as OP,Main dealer cost to have this done is around £150,thats if they charge you at all,it should be done under warranty, also they now use a different oil to stop this happening in the future.I strongly recommend getting front and rear diff oil changed every 30000 miles,that will set you back around £120 all in at a main dealer as well.Hope this helps and good luck
cayman-black said:
so is this wheel theory a load of bull then?
Well considering changing the diameter of the rolling wheel is only (as far as the transmission is concerned) the same as travelling faster (more revolutions for smaller wheels) or slower (less revolutions for bigger wheels) and they are all the same size, then yes. It's a big pile of steaming horse manure.There is no adjustments that can be made anywhere to compensate for different diameter wheels - as long as the four wheels are all the same.
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