Lock up occurs where it did before, about 55 mph; this is with 3.42 gears and 33" tires, so it's a bit higher lockup speed than stock due to the oversized tires. However, there is about a 500 to 600 rpm difference when locked up, which is much more than before.
I pull my 21' camper, so the high lockup will be quite annoying when it's not locked up; probably will hurt the MPG department as well.
I see Transtar makes an upgraded TC for the diesel for a decent price. I'll see if my tranny guy will order that for me.
To his defense, I looked up where he sourced his converter, and they only list one converter for both gas and diesel. I'm not sure why that it is, but if you go to Rock Auto, they also show the same thing....
I spent so much time and effort focused on the engine building, I slipped up and assumed my transmission guy would put in the same kind of effort.
Casey
1995 K1500 Tahoe 2 door, 6.5LTD, 4L80E, NP241, 3.42's, 285/75R16 BFG K02's; 1997 506 block; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, HX35 turbo, Turbo Master, 3.5" Kennedy exhaust, F code intake; dual t/stats, HO water pump, Champion radiator; Racor fuel filter