Been noticing lately that 1st whines from ~2500rpm and up. No other gear has any whine.
Around the end of spring/beginning of summer, I changed the gear oil with Syncromesh (had a grinding 3rd and no longer grinds) and replaced the end cap seal, the 2 pivot pin o-rings, re-sealed the tower emblem and put in 2 new axel flange diff seals. Never noticed any noise until recently.
Any idea what could cause this noise? Is there anything I should worry about? I have no other symptoms other than noise. Trans does not leak anymore.