I've been having problems with my hurst shortshift 6-speed in my 97SS... Whenever I drive in the 'upper' gears (1-3-5 'upper' and 2-4-6 'lower') for a bit of time (a couple mins or more), I always have trouble getting into the 'lower' gears. When I try to shift into the 'lower' gears, I am getting a lot of resistance. Only after holding the shifter down will it slowly slide into the gear. I was wondering if anyone knew anything about this problem?
I've searched the posts for something similar, and the only thing I can really find that is similar relates to the synchros. Unfortunately, I am not very knowledgable about this kind of stuff, so I have no idea what that means

. Any feedback would be great!