Hi,
I have FJ70 (Rkr) with 1HZ (4200 CC, Diesel, manual transmission) engine. My jeep is giving low fuel mileage (6-7KM/L local ) with 4*4 lock (front wheel) in-active/free, on the other hand with active 4*4 locks it's giving 9 - 9.5KM/L local. This is strange thing I'm experiencing. As per my knowledge (mostly got from the mechanics ) when lock is on/active, vehicle is on 4 wheel drive and consumes more fuel compares to when locks are free/in-active.
I got the jeep checked by multiple mechanic, everyone has their version of problem which does not makes sense to me at all. Some are saying, locks are not attached properly: This is not the case, because I'm unable to use 4*4 gear when locks are free/inactive:
I suspect the clutch-plate: any recommendation would be appreciated. Also please recommend good/reliable mechanic in RWP/ISB.