Hello woundering if anyone has any idea why as I drive in 2wd or 4wd when my rpm hit about 1800 (approx60kmh)they suddingly just drop then instanly kick back in ,no other issues lights don't flicker no dash sybols show up it just pauses then kicks back in.Also there is no noise assocated with this.
Truck is a 2008 ranger 4.0l 4x4 fx4 under 100kms. auatomatic.
Thanks