Thrust bearing failure
Posted: Tue Oct 17, 2017 8:50 pm
Lost a thrust bearing on a sb Chrysler with a 3spd 727.
Still uncertain as to what killed it.. I suspect it was a transmission issue. Trans is high mileage with transgo shift kit and stock converter. I've read on the subject, seams the two primary causes are ballooning TC, too high of line pressure (blockage) or splines on TC binding/hanging on input shaft. And of course not correctly seating bearing or insufficient clearance from flex plate to converter.
I doubt my tc was actually ballooning. My guess is line pressure or splines. I've looked at the input shaft, the splines are a bit sharp, but no high spots or obvious ridges etc.
Anyone else have this happen? I've since modified the new thrust bearing with an added oil hole on the thrust face with ab additional corresponding oil galley from the main feed, as well as chamfering the upper bearing shell to add additional feed via the parting line of the bearing halves.
Anyone thats familiar with 727's I'd greatly appreciate some advice
Still uncertain as to what killed it.. I suspect it was a transmission issue. Trans is high mileage with transgo shift kit and stock converter. I've read on the subject, seams the two primary causes are ballooning TC, too high of line pressure (blockage) or splines on TC binding/hanging on input shaft. And of course not correctly seating bearing or insufficient clearance from flex plate to converter.
I doubt my tc was actually ballooning. My guess is line pressure or splines. I've looked at the input shaft, the splines are a bit sharp, but no high spots or obvious ridges etc.
Anyone else have this happen? I've since modified the new thrust bearing with an added oil hole on the thrust face with ab additional corresponding oil galley from the main feed, as well as chamfering the upper bearing shell to add additional feed via the parting line of the bearing halves.
Anyone thats familiar with 727's I'd greatly appreciate some advice