Rolfkerkhof:
Hi,
Skane:
I don’t now about the gearbox as I believe the Foden 12speed limit was around 335 to 350 hp , but it did have the 30 ton rated rear Foden hub reduction axles ,it was operated in the Guilford area ,it is for sale on the Foden Society Web site but the cab has succumbed to the weather badly and the body would need some major work .
On the Foden Society Web it says: Fuller 15 speed and 40 ton hub reduction Foden rear end
Regards
Rolf
TruckNetUK . Old Time Lorries . Fodens. Page 32 . Foden S90 56R070CAT4509 6x4 Heavy Recovery Vehicle - HRV . VALKYRIE .Shrove Tuesday,5th March,2019 - Pancake Day 
The Foden S90 56R070CAT4509 is a one-off custom-built special based on the Foden Military Medium Mobility 6x6 Range,such as the Foden
S90 46V026R3009 FH70 6x6 Artillery Tractor and the Heavy Recovery Vehicle - HRV version.
The Foden S90 56R070CAT4509 is believed to be left-hand-drive,it was built in 1974 and operated by:-
All Recovery & Repair Ltd,
Westwood Lane,
Normandy,
Guildford,
Surrey,
GU3 2JG.
Foden S90 56R070CAT4509,S90 Military Sleeper-Cabbed,Caterpillar 3408,18-Litre,V8,450 BHP Diesel-Engined,Wreckers International Recovery-Equipped,6x4 Heavy Recovery Vehicle.1974.Fuller 15-Speed Gearbox,40-Ton Hub Reduction. Foden.4#

Foden S90 56R070CAT4509,S90 Military Sleeper-Cabbed,Caterpillar 3408,18-Litre,V8,450 BHP Diesel-Engined,Wreckers International Recovery-Equipped,6x4 Heavy Recovery Vehicle.1974.Fuller 15-Speed Gearbox,40-Ton Hub Reduction. Foden.1#

NOTE: I’m not sure about this lorry’s GTW = Gross Train Weight,I’ve estimated it,but it could well be higher or lower 
VALKYRIE