Hi guyz,
I have bought 2006 R51 Pathfinder and I've already begun with some mods. Started with engine cleaning/decarbonizing (with some taps off water), MAF cleaning, ATF fluid full change (draining + circulating until fresh = 14 litres of new ATF instead of 10) and finally EGR disabling (by pulling out solenoid valve actuator, no blanking needed).
Now, when in 4HI or 4LO modes with differentials more tight (seems both front and rear are unknown percentage LSD, because on asphalt tires squeek and scream a lot when turning in those two modes)...well, what's weird is that it seems like transmission/transfer is very tightly coupled to engine, so whole vehicle bumps at slight touch of gas pedal.
It is not anymore "nice and soft" acceleration from stop to moving (like in AUTO or 2WD mode), but as soon as I press gas pedal just a bit, wheels start turning instantly.
Might it be that torque converter is fixed in 1:1 coupling, without any smooth torque conversion in 4HI and 4LO modes?
...or should I give my torque converter a check?
BTW...there are NO diag codes, not in ECU nor in TCM. Stall RPM is around 2900 and torque converter LOCK engages and disengages at predicted speeds, so by diagnostics it looks healthy.