Sior
Banned
The T25 Medium tank was the intended Sherman replacement. It had the same 90mm gun as the M26, was lighter at 30 tons, with the same engine. It was more reliable, faster, and would fit existing LCraft and transports.
The Army did'n want it, because they had an unjustified faith in the 76mm gun then being integrated into the Sherman, and underestimated the impact of the Panthers and Tigers.
A small series was built and not used on operations.
It can be though of as a US equivalent of the T34/85...
A sherman with a 17pdr integrated into the larger turret of the 76mm versions would have been another solution to the panther problem. The israelis modified their Shermans along those lines.
The British did it was called the Firefly!