Is this a blocking ring or synchro problem??

[shomesomesho]

At rpms over 4000 it is very difficult to shift from 1st ==> 2nd and from 2nd ==>> 3rd. I literally have to wait until rpms drop below 4000 before it will go into gear.

It is an MTX with ~150k, never rebuilt. Clutch/PP/TOB are new less than 2500 miles. I've tried all kinds of tranny ATF fluids without remedy (Mobile 1, Royal Purple, GM syncromesh, etc.).

Is this a synchro or blocking ring problem or something else?

 

[Minnesho]

sounds very similar to the problem i'm having as well ... i almost have to slam it into gear. i adjusted the pedal by lifting up on it, i'll have to check and make sure it dosent have excess slack though.

 

[Minnesho]

usually dosen't just 3rd do that? is it common for it to happen to the other gears all at once? i'm wondering if it just isnt a shifter problem.