Hello ,. Need some help with the transmission shaft ,I get .003 run out at end with 3 of the screws tight when I tighten the screw with the red mark on it [see pic.].It change the run out to .013 ,anyone had this happen before??
also the flywheels are different[other pic] but all have starter ring gears holes
Thank you all
The first one could be 1927 when Ford went to fully machined flywheel the other semi finished one between 1919 and 1926. The 1927 fully machined one is said to be better balanced. I have one in my engine but do not recall what the area where the triple gears ride on looks like. I am not even going to try help on the other question.
Lorenzo, the first thing I would do is remove the shaft and turn it 180 degrees and see if the problem remains. While it is off, measure the thickness of the flange on the shaft and the mounting circle in the flywheel. You may find runout in either/both of these, and making them true should help.
Allan from down under.
Remove the shaft and check the flange for nicks, dents & burrs. Also, inspect the flywheel surface against which the shaft flange mates for any damage or debris. Be very fussy, any tiny flaw can throw things off.
will do,.. Thank you
Put it between centers to see if the shaft, or flange are bent.
Are you bolting the flywheel and trans shaft to the crankshaft. If so, the problem could be the flange of the crank is not perpendicular. As you know there are two surfaces that must fit together so there is little run out at the end of the trans shaft First try to reverse the fit to see if you can get end run out 4 thou or better. If not consider machining both surfaces of the trans shaft flange and the rear surface of the crank flange. Reason you machine both surfaces of the trans shaft is to keep the flywheel running straight.
If everything tests out OK, but the flywheel wobbles when spun, consider using another flywheel. You could remove the pins and machine the mating surface, but I've never had to do that.
I will "assume" (dangerous word) that you have checked the crank flange for running true!!
I ALWAYS balance my T flywheels. They are usually out and sometimes quite a bit. I find it makes a BIG difference in how nicely it runs. I don't waste my money on balancing drums. I do run a matched set of triple gears
I agree with the rest of the advice.
Also, after you have the main shaft running true, then you should make sure the output shaft is also running true
Richard, I am bolting all together- ,the flange at the crank is .0015 off, im using other shafts and flywheels to se if I can get the 4 thou.
What I find out of wack is that if I leave the bolt marked [red] loose I get almost there with other 3 bolts tight..
Thank you all for your input Lorenzo
You have .0015" run out on the flange surface of the crank. That needs to be fixed first, without doing so, the run out only gets worse the farther you build. You should also check the main shaft flange surface for run out and correct as needed. Most all main shafts are out but can be corrected on a lathe.