Those are some harsh words WT! Can you give me a little insight on why?? I heard a rumor toyota equipped many 90's trucks with them just to get rid of them! Perhaps this is why im having such a hard time finding the 4. I will be swapping my 4.88 gears from my 81, so power should nt be too much an issue with my 33's. Ok then, what trucks have the 3.4?? most articles state v-6 and thats it. Is there a vin number code to tell the diff? I willl have to change my duel ultimate to 23 spline if I do the v6.