Quote:
Originally Posted by Cobra4B
It has Liberty's synchro package and the optional .82 5th gear. QuickTime has a good reputation and for the price of that bellhousing I sure hope it's square and oriented correctly. Any tips on how to measure this stuff? Are you looking for flatness of the rear of the bellhousing, or parallelism between the engine face and rear of the housing, or both? How do you go about checking to verify everything is centered up perfectly?
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Brian, with engine on floor on blocks;
1. Fit and torque flywheel and bellhousing,
2. Use magnetic based DTI and attach to flywheel inner circumference,
3. Set up DTI so that it is reaching back out through trans mounting hole in bellhousing onto trans mount face,
4. Zero DTI and then rotate engine 90 degs to check parallelism of back face of bellhousing to back face of block, repeat until you have readings every 90 degs (min), you should have prefereably only around .002" out and less than .005" max,
5. Set up DTI so that you can run it around the inside diameter of the trans location hole in the bellhousing, zero DTI,
6. Again rotate engine and get readings every 90 degs to check concentricity with crank centerline, same limits.
If you are outside .005", parallelism can be adjusted by shimming or machining. Concentricity with offset dowel pins or remachining dowel holes.
To give you an idea, my Ford Racing bellhousing is within .002" in parallelism and just inside .005" cocentricity. I check this everytime I have the engine out of the car prior to fitting the trans as it is really critical with likes of tripple plate clutches.
Hope that helps, Kel.