The 65 Dart FSM recommends that the housing face/transmission bolt surface not runout more than .006 inch.

They measure from the flywheel to the face with a dial indicator & rotate the flywheel. This is shown on pg 6-6 of the FSM

I find my reading are made erratic because of .005 crank endplay on my 60K original Dart motor which is within the FSM spec tolerance of .002 to .007.

Am I missing something obvious?

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1965 Dart 125k, 225, Carter BBD Super Six, 2 1/4 single exhaust., sbp manual scare-bird front disc, 7 1/4 rear 2.94 sure grip, 15 x 4.5 wheels, 833 OD with hyd. throw-out bearing, electric fan, ram air/heated air, Accusump.

You should make sure the crank is in the same fore-aft position while rotating. That endplay number should not figure into the runout number on the BH.

Lou

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Home of Slant6-powered fun machines since 1988

I used a heavy plastic mallet to whack against the flywheel to drive the crank forward.....each time I rotated to a new position.

The result was much better......007" runout max on the transmission bolting location at the 4:00 position.

I figure I need about .013" BH shim at that extreme 4:00 BH position with less as I move away from that point.

I prefer to shim the BH rather than the transmission to get a long term solution not affected by transmission removals.

Once I get my offset pins to fix the clutch housing bore misalignment I will reassemble the BH with shims & offest pins & run the tests again to verify both BH bore runout & BH face runout are within specs.

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1965 Dart 125k, 225, Carter BBD Super Six, 2 1/4 single exhaust., sbp manual scare-bird front disc, 7 1/4 rear 2.94 sure grip, 15 x 4.5 wheels, 833 OD with hyd. throw-out bearing, electric fan, ram air/heated air, Accusump.

Sounds like you are doing it right. This takes time, but can pay off in less vibrations...

Lou

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Home of Slant6-powered fun machines since 1988

If you have this much runout on the face of the bellhousing I think I'd take the BH to a machine shop with a surface plate and see if the block and transmission faces are parallel. If they are it's likely the runout is in the crank or flywheel. If the bellhousing faces aren't parallel the shop should be able to cut the transmission face to make it parallel.

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Joshua

BH is out & could be checked at my local machine shop....

Of course sometimes tolerances pile up ....like how good is the engine flange versus crank?

60K engine is original & in 65 car.....auto to 4 spd conversion probably brought in 85 truck bellhousing machined slightly different?

Pulling engine would be my last ditch effort if shimming & offset pins don't do the job

Flywheel is freshly faced

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1965 Dart 125k, 225, Carter BBD Super Six, 2 1/4 single exhaust., sbp manual scare-bird front disc, 7 1/4 rear 2.94 sure grip, 15 x 4.5 wheels, 833 OD with hyd. throw-out bearing, electric fan, ram air/heated air, Accusump.