Dignostic codes on Range Rover Sport

[mart 63]

I have just met a chap in Motril (Granada), Southern Spain, who is trying to get back to the UK but his 2005 Range Rover Sport 2.7 has thrown up various Diagnostic codes. It starts and drives but does not shift from 3rd into higher gears.
The car keeps throwing the "F" Transmission fault, limited gears available.

The codes that cone up are
P0735- GEAR 5 Incorrect Ratio
P0783- 3 to 4 shift malfunction
P0730- Incorrect Gear Ratio

Any help or advice for him would be appreciated
Cheers Mart