Stabilizers

[Brahmin3]

http://www.fas.org/man/dod-101/sys/land/row/t54tank.htm

The T-55 also has two-plane stabilization of the main gun rather than vertical stabilization only, and a basic load for the main gun of 43 rounds rather than 34.

I suppose it was shitty in comparison with modern standarts, but still, there were a stabilizer - a fact, which is nicely represented by stab. rating of 2.

I didn't see any remarks about stabilizers on M48 series, with exception of some modern SK and Taiwan variants.
And M-60:

The M60A1 was also equipped with a stabilization system for the main gun. However, the M60A1 was still not able to fire on the move, as the system only kept the gun pointed in the same general direction while the tank was traveling cross country.

With M-60A3 finally receiving nice and cool full stabilization in 1979.

So, in other words, it seems that you should read something except Tom Clancy before writing something like "The ONLY thing the Soviets did well was propaganda" around.