LJ78 4X4 and diff lock not working helppp!

[madmax120]

Cant for the life of me figure out why my 4x4 isn't working.. Everything is on as should be but the front driveshaft wont go!! It has electronic hubs but the pins seem to be engaging fine. Its also got the diff lock option with a switch and i cant get that going either? Any suggestions to try to get it going? Cheers

[mudlva]

check vaccum pipes as it sounds like output from trans is not engaging

[uptomynutsinruts]

May be pissing into the wind here but dont these have the electric actuator on the side of the gearbox? My mate had an electric actuator on his truck seize up, removed it, sprayed (drowned) with Electra-clean and shes good as new

[pruggerdore]

May be pissing into the wind here but dont these have the electric actuator on the side of the gearbox? My mate had an electric actuator on his truck seize up, removed it, sprayed (drowned) with Electra-clean and shes good as new

no its a vacuum diaphragm, so if vacum is geting down to diaphragm suck on pipe to unit and see if there is resistance. if you can pull air thru it diaphragm has a hole in it. buggered. heard there prone to failure but not sure if its seizing or diaphragm that is the issue.

[oldblue]

Diff Lock will only work in low range.with the Hub Lock button in.

[mudlva]

Did you find your problem?

[madmax120]

All sorted! Cheers for some reason the vacume line were around the wrong way haha