Who Knows What This Is?
Reply #14 –
I have a problem with the entire theory of "external forces" being imparted on the crank. That is, assuming things are installed correctly. I have read/heard about this, including a local yahoo that thinks his E4OD is "pulling" the crank out of his 5.4 in an F150 Lightning. On the no less than four occasions I have installed the AOD in my red cougar, I have put the converter all the way on, to the lockup shaft, until it bottoms out. I then mate the trans up to the dowel pins, make sure it is actually lined up, start the bolts, begin to crank them down, find that it's working on straight, finish tightening the bolts, find the trans perfectly mated up....and then rotate the converter and flexplate little by little with the balancer, doing the converter nuts of course, through the inspection cover. The studs on the converter stick through *just* enough to start the nuts, and they get pulled through 1/4" or so while tightening the nuts down. This says to me that the converter is definitely spaced AWAY from the tranny input shafts a good 1/4" or so.
At no time should a torque converter impart ANY thrust force on a crankshaft, if installed properly, by this anecdotal evidence and by what I think is common sense from a design perspective.
For a stick? Same deal. I think many people misunderstand the construction. I did myself until I looked at pictures and thought about it. The entire clutch assembly is bolted to the flywheel, not to the bell or block. So the force of the pressure place acts on the clutch plates and the clutch casing...which is then acting on the flywheel. Now, a misadjusted throwout bearing, is causing a constant force against the pressure plate, from the outside. From the frame of the car. This would pull/push on the flywheel. However I have read claims of "too strong of a clutch" causing thrust failure, and this is simply not possible, at least when engaged. I guess over thousands and thousands of miles, with many clutch in/outs with a very strong pressure plate, this might cause significant wear. Maybe I am misunderstanding what I read anyway. 90+ % of the duty cycle the clutch is engaged, a very small amount of the time is an outside force (the forks) acting on the pressure plate. Perhaps this is all you need to ruin the bearing.
Topic: Who Knows What This Is? (Read 2724 times)
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