All you T5 rebuilders get in here!!!!

Mustang5L5 said:

Well if you take that ring off (It's called a blocker ring) you'll see a friction material linign the inside. This is what pressed against the cone and slows down or speeds up the gear (or in this case input shaft)

As the friction material wears, the blocker ring will come closer to the cone until there is nothing left. When that happens, it will be up against it and won't be able to slow or speed up the gear. Then you get grinding.

If you look at your old blocker ring, the friction lining inside is probably worn down to nothing compared to the new one.

Make sure you check the dog teeth of the input shaft. Those are the teeth that look like monopoly houses. They should be crisp looking with pointed "roofs". When you grind gears, the tips tend to wear away as they get damaged. If the damage is excessive, you will need to replace the gear/input shaft. I can't see how yours are from that picture though.

They should look like this.


Gear on left is input shaft, middle ring is 3-4 synchro and gear on right is 3rd. As you can see, there is a gap on my trans as well. This is an OEM 25K mile T-5 that has not been rebuilt, so this is how Borg Warner/Tremec intended it.

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