Weird problem!
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Weird problem! I am in the process of fixing the 5/6 gear whine in my t56. I'm looking at the old gear and the new one, and am seeing some differences.
Whiney gear: inside is grooved from top to bottom except for one small spot in the middle. Slides onto shaft with almost no force.
New gear: Grooved for the first 2 inches, then its smooth for the rest of the way. Can't even get it to go on the shaft without a LOT of force.
Also, the shaft is fully grooved much like the old gear.
What's going on here?
Whiney gear: inside is grooved from top to bottom except for one small spot in the middle. Slides onto shaft with almost no force.
New gear: Grooved for the first 2 inches, then its smooth for the rest of the way. Can't even get it to go on the shaft without a LOT of force.
Also, the shaft is fully grooved much like the old gear.
What's going on here?
The gear should take a press to get on. There should be a flat surface on both the shaft and gear. (LS1 T-56)
From the factory the original shaft was too narrow by a couple thousandths. This caused the 5/6 driven t become loose and destroy the main shaft in the process. This was in the LS1 f-bodies.
Are the splines on the shaft and old gear in good shape? As a loose 5/6 driven gear will usually eat into the splines. Mine had almost 80% of the spline missing. Again an LS1 -T56.
From the factory the original shaft was too narrow by a couple thousandths. This caused the 5/6 driven t become loose and destroy the main shaft in the process. This was in the LS1 f-bodies.
Are the splines on the shaft and old gear in good shape? As a loose 5/6 driven gear will usually eat into the splines. Mine had almost 80% of the spline missing. Again an LS1 -T56.
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TECH Enthusiast
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Don't know what you have. A spool OD gear with a full spline did not come in any TREMEC T56. I would suspect off-shore parts. That shaft is in the same boat....maybe they came on the same boat..JK