Clutch Trouble???

Hi all, another newbie here.

Been having trouble ****ing into 5th gear. Seems like the clutch isn't fully disengaging and causing it to grind.....sometimes.
Stang is an '02, 3.8L, with 33k on the clock.
First thing I thought of was the trans might be low on fluid. Haven't checked it yet, been raining every afternoon when I get home. Then I found, at times, it was hard to engage reverse.
Tried the pulling up the pedal trick, no clicks and situation wasn't better. I haven't crawled under the dash with a mirror to look at the adjuster for damage yet.


Any ideas??
Bad cable??
Bad adjuster assembly??


HELP!

I have one. The manual suggests depressing the clutch to within 1/4" of the floor then shifing from 1st to reverse. If there's difficulty then somethings wrong in the clutch system.

Last night I tried, while sitting still, depressing the clutch, counting to three, then putting it in reverse. No grinding. Did this several times with no trouble. I suppose the clutch is releasing peroperly since there's no noise.
Tried depressing the clutch, again while sitting still, then quickly shifting into 5th. Instant grind. Tried it with counting to three before engaging 5th, no noise.

I'm beginning to think it's a bad 5th gear synchro. And the warranty is expired.

Looking at a service manual, swapping a clutch cable isn't very hard. About the hardest part is getting under the dash and playing with the self adjuster to remove/install the cable.

I did try pulling up on the pedal, no difference. No click either. I suppose the clutch cable isn't stretched, or worn, enough to need adjutment.
I've watched the ex drive and she practically rams it into fifth gear. I'm beginning to think she's screwd the trans up.