ta thank you very much .

is the oil pressure switch/gauge on the oil filter housing ? this mushroom looking thing looks corroded there is a wire dangling down from what i believe is the oil pressure switch...... i take it is just a matter of undoing it from the oil filter housing and replacing with a new one. ta

just thinking about this subject, it only does the cluncking noise in 1st or 2nd gear when you throttle on of off, and not in 3rd or 4th..

no, i am not sure it is from the gearbox, just that it is coming from down underneath around that area great, i will be checking the gear end float in the transfer case and and if thats ok ill move onto the halfshafts.. thanks for that.

sorry but i should have said that i have undone the 6 nuts that hold the mainshaft rear bearing housing and checked the castle nut, i levered the gear with a screwdriver to see if i could move the gear to and fro and could not, the tab washer was still in place on the castle nut.

when going slow with the throttle on, off the then on again there is a clunking noise coming from the gearbox, as if gears are moving inside taking up the slack, this only happens in 1st or 2nd, not 3rd and 4th. anyone got any idea of what it can be or point me in the right direction. thanks