trouble

[holymother]

i have a couple problems
sometimes when i put my 4 wheel drive it beeps and flashes
just wondering what this is all about
second when i get to about 60/70 km my truck seems to drop rpms and seems to be stuttering dont know what this might be

[BUSHWHACKER]

i have a couple problems
sometimes when i put my 4 wheel drive it beeps and flashes
just wondering what this is all about
second when i get to about 60/70 km my truck seems to drop rpms and seems to be stuttering dont know what this might be

What year/engine/fuel type?

[holymother]

its a 91 toyota hilux surf 2.4 deisel

[graham78]

dont panic ur not alone, i have a 93 2.4 and when it gets to 55 ish the overdirve kicks in and it drops from 3200 ish rpm to 1800 ish... it doesnt cough and splutter or try to die but boy it feels like the truck is going backwards and till i got used to it i was worried....