They are right around 2350 I believe. 60mph is dead on at 2200 rpm. Not sure if it would be different with an auto since I don't know what the factory OD 4th is. The 1HD-FT also probably makes torque lower down in the rpm range compared to the 1FZ
I am running also 2350 @65mph. 285/75r16 old tires. George installed in the transfer case the two kits TTPTK80 (part time) and HF2AOD-CB 10% over drive. The vehicle is a 93 with a 1HDFT&H151.