Yep, bad hydraulics would be my second guess.The hose from the clutch master to the slave gets dry and cracks allowing the hose to expand when trying to engage the clutch. When mine did this, I'd sometimes get a slight grind up shifting, but it was near impossible to down shift.
Synchros are also a likely culprit.
It drives fine. I dove it for him today. Just doesn't like to down shift from 4 to 3rd unless moving around 30 or less.Yep, bad hydraulics would be my second guess.
OP, does it want to move a little bit at a standstill, foot off the brakes? That would be a good indication that the throwout bearing isn't getting all the pressure it needs.
We changed the gear oil in it. It was some nasty half water have milk ****.Vavoline and Penzoil both make a synchromesh fluid that works, Redline MT-90 is a great choice as well.
Tons of guys run motor oil and I've heard there's supposedly a TSB on that as well, though I've never seen it (but I'm also not in the business).
Thank you I'll let him knowI had really bad worn out synchros, and had the same issue, even after I changed the fluid.
Some tips, look on here for a fluid, IIRC, the manual has a non safe fir Synchros fluid printed.
I drove for a loooooong time with bad synchros, lol. Like 3 years. It would sometimes totally lock me out from being g able to downshift. It was rare, but around 40 MPH. I would shift all the way to 5th, and then it would allow me to go back to 3rd? And be able to go to any gear after that.
I say 3rd with a question mark because it's been a while. But if it locks him out from going down, go all the way up to 5th, and then monkey around with it. Saved me a few times on a busy street.
I have used 10W-30 for 10 years+ in AX15srive it for 10 days and when I get back from Arkansas work trip we can dump it and put in better gear oil.