If you are using 99% of your brain to try to make sense of what erroneous instrumentation is telling you while at the same time being affected by g forces, now is not the time to allocate 10% of your brain space to making a radio call.
+1. Besides, you're still planning to fix whatever the problem is, so issuing a Mayday call is admitting defeat. And you may not know enough about the problem to verbalize it in the first place. This whole conversation is rather silly...