low stall conventer

[Jurek]

I have 83 6.2 diesel van ,th 400with GV and allison style conventor with anty balloning plate./not sure what stall rpm is/.I am getting 18-20 on the hwy.Would 1200rpm stall conventor give me better milage and drivebility. If yes who has it. Opinions please. Thaks . Jurek

[6.5TDTahoe]

I doubt that any specific 6.2 Diesel T.C. would make any measurable MPG increase. The truck would respond to a taller axle ratio. like a 2.73 .take into account the tire height/roll out when trying to increase MPG. A 700R4 trans with the lock up working could increase the MPG 5 to 7 MPG. depending on the axle ratio,weight carried. 30% less RPM in top gear is huge influence on MPG.