Bellhousing alignment ring question

[jrohrig]

I installed the silver adapter ring to my QT rm-6060 bellhousing so it would fit to my tkx transmission. My question is, do I check the bellhousing alignment with this ring on, or off. Got of the phone with Holley/QuickTime and they didn't know, lol201057

[ggunter]

You can leave it off to check. All your doing is checking the concentricity of the crank to the bell opening.

[ggunter]

You don't want the input shaft out of concentricity by more than .005 total runout because they use a tapered roller bearing in the input shafts of Tremec transmissions. They don't flop around like a ball bearing input shaft.

[gbranham]

For gits and shiggles, check the runout with it in place, and then again with it removed. But, I don't suspect that ring centers the input shaft as much as the bellhousing orientation itself does.

[jrohrig]

Thank you gentlemen. The ring has grooves on it so I wasn't able to calibrate it to 0 correctly

[JohnK]

It shouldn’t make a difference, and probably easier to do it with the ring off. To make sure the ring doesn’t introduce eccentricity, you can measure its thickness with a caliper at 12 o’clock, 3, 6, and 9 o’clock. It should be the same thickness at all four places. If the ring is thicker in one area, it’s defective.