R150 synchro, transmission, shift

[Chazilton]

Howdy.
1990 toyota pickup dlx 3.0 v6 2wd

I recently had shifting problems until shifting was non existent. I changed the clutch, pressure plate and master cylinder. Bled clutch and then tried shifting into gears. The shifter would not move even a bit. I split the case and everything looked good. All gears spun and it seemed that the synchros were working. All bearings looked good also.

I can shift into every gear with engine off but when I start the engine it just feels like the shifter locks up and won't engage any gear.

Clucth is good. I place into gear, press clutch then turn engine on. There is no resistance on the clutch untill I release the pedal.

So is this a sychro or gear bearing problem.?

 

[Chazilton]

Anyone.?

No one has any input.? If it was the clutch not disengaing enough would I still be able to hold the pedal in and not have the gears engage the gears.?

 

[amalik]

Try yotatech, they are better with 1st gen info. T4R has the best info online for 3rd gen+

 

[RonJR]

What kind of gear oil did you use? GL-4 is best for manual transmssions, but hard to find. The more common GL-5 is slicker, and often causes the synchros not to work well. Combine that with a clutch that may dragging slightly when disengaged, and the synchros can't stop the input shaft and allow you to get it into gear. If the input shaft is turning, even slowly, the synchro balk rings will absolutely prevent you from shifting into gear.

Reverse normally isn't synchronized. If the clutch isn't fully disengaging, it should grind when you try to put it into reverse.

Redline GL-4 is available online for about $60 per gallon. Expensive, but it works well.

Also, I agree you'll probably get more help for these old vehicles on yotatech.

 

[fourwd1]

Moved to Classics section, you should get more response here.