Calf cranks from truck

Hi guys

I've been working my truck game and focusing 100% on leg attacks. I've been having lots of trouble when my opponent:

1. Crosses his feet like in close guard and i can't break the lock to go for the crotch ripper, banana splits.

2. When i'm hitting the calf slicer, flexes the locked up leg straight so i can't reach the toes.

I know i can go for the twister, armbar or backtake but I just wanna troubleshoot my leg attacks and get subs from those.

Any help would be hot!