0 Members and 1 Guest are viewing this topic.
The W-series is about 20% stronger than the G-series: Larger and wider bearings, larger and wider gears. In comparison, the R-series is at least twice as strong as a W-series, probably more.The best argument for the W-transmission would have to be a dealer-equipped Supercharged 2.7-liter 4-cylinder 3RZ-FE in a 3,500-lb 4Runner, which TRD estimates to produce 238 ft-lbs torque / 210 horsepower. Beings how the S/C upgrade did not void the factory drivetrain warranty, we must assume Toyota feels confident to push 240-ish TQ through a W-transmission (specifically a W59, which, practically speaking, is the same strength as a W56) (and I say 4Runner because that is heavier than a Tacoma but still carried the same drivetrain warranty).
Sorry I was too busy today to get to this. I'll see about checking on it tomorrow-
How much stronger is a W56 with your HD bearings?
Think a R151F could hold up to a 300 ft lb turbo diesel?