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#7521020; nsn 3120-00-752-1020

SPICER 3053, 5th gear sleeve locating pin, dimensions... Dimensions and some pics, below...

Yes.

The pin can only be installed after removing the sleeve. You may have to fab that pin, out of #1045. I will post the dimensions later today.

I guess Spicer put that pin there for one reason: They sure didn't want that sleeve to be able to rotate on the shaft! The TM says the inner sleeve diameter should be 1.7495" to 1.7500", and the shaft diameter 1.7500" to 1.7505", both areas marked as "none", for wear limit. That means a zero...

I know that the manuals don't mention it, but that "little metal particle" you found is actually a locating pin that goes into that hole you saw in the 5th-gear sleeve. It is there to prevent the sleeve from rotating on the shaft. The head of the pin goes to the inside of the sleeve, stuck in...

That synchro is ready for retirement, I guess!

Tom was right... (but then never said a word?): there is (was) a mistake in that list and I'm very sorry for not discovering this any sooner...:oops: An "E" is (was) missing, behind the number RNU207... (Item DD); the correct number is RNU207E. The difference between both is (only!) 0.2mm in...

If shopping online, just type in "308ZNR", under the category "Deep Groove Ball Bearings with Fill Slot". Most mayor brands carry this one. FWIW: the single "Z" stands for the one-shield-only; the "NR" for the snap ring.

Not saying a std bearing won't work... just, not lasting too long. Keep in mind that the 3053 behind a LDS (or turned-up LDT) does its hard work in 5th-O.D. gear, most of its time, and that's when it sees significant radial- and also axial forces, from the 4 helical gears involved. Much more...

That's normal, despite the condition of the input shaft bearing. BTW, that bearing shown in 1st pic, post #5 is not what should be there. It takes a BL308 "high load", with 11 brg.balls; not the std 6308 with only 8. Correct bearing numbers can be found here... G.