i did some researching on it, its all complex and technological. VVT, DOHC, the works.

Does it have Displacement on Demand too?

One topic that often overlooked when the subject of drivetrains comes up is the transaxle. With all these new engine/transaxle combos coming out, it just accentuates GM'* inability to put a solid transaxle behind (beside?) the L67.

With the Series III L67 having 260 HP and 280 FT. LBS torque, the 4T65E-HD transaxle is at it'* rated torque limit. Rather than come up with a beefed up 4T65E-HD, it seems GM prefers the 4T80E because it can take much more power but it'* a bigger package.

Signs are the L67 and 4T65E-HD will have limited life from here...too bad because it'* a durable engine that responds well to mods, and it most be cheap for GM to produce. Guess the W and H bodies will still use it for a time but...

Cheers,

They should switch to a 4t80, but that'* too simple. WHy mess with the 60 when it worked better! It'* at the rated torque exactly because the engines are kept at that thru timing adjustments.