I know, not strictly truck related, but still...

My AWD Previa has an A340F and it will tow a loaded U-Haul 6x12 box trailer just fine. The A340 is used in all Previas from 1991-97 and failures are very rare. Those rigs usually run to 300k. The most common transmission problem is with the wiring harness shorting out due to corrosion (an easy fix).

Durable? Yes

Shifting action? Great. Firm shifts.

Torque Converter lockup? Yes, at 50mph.

Gas mileage? OK I guess. My 89 x-cab 22re truck w/5 SP gets about 23 in summer, the Previa with supercharger gets around 20-22 depending on how fast I drive. The Previa weighs 4200lbs and is full time AWD. Truck weighs less and runs with fr hubs unlocked.

Good for pulling a 3000lb trailer? A340 Previas can tow 3500lbs but I''ve never towed that much weight, so can't comment on how the tranny performs.

Overall, the 340 series trannies are reputedly very good. I wouldn't hesitate to own another vehicle equipped with one.