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shimming the starter gear is not a big deal 35 percent of the cars out their have a shim or two and the flywheel is not at fault like you think, their is a way to fix gear to gear mesh ( starter Bendix to flywheel ) take off the solenoid on the starter it is easy, you do not have to but its way easer to check with it off install the starter than using a screwdriver carefully pull the gear ( BENDIX ) out of the starter all the way--- sometimes you can reach around the starter and operate the plunger ( thats the piece inside the soloniod ) in and out if you have the room for your hand --- and what you want to measure is the gap just like a spark plug but ( GEAR TO GEAR ) and .025 is what you are looking to have ( MAX ) --- ( we have cut some old feeler gagues to do this as they are to wide to slide in between the gears ) with out any shims the gear will be right against the flywheel gear so tight the starter wont return on its own, it will get jammed and that is why your starters are burning up, when the starter gear is jammed the whine is the small gear spining at high speed against the ring gear ( flywheel ) i know it would be better if you didn't have to shim it but thats why they make shims and any auto parts store will carry a shim kit or sell them as singles, my guess you may need a .015 or more to correct the gear mesh don't buy anything else till you correct that NOTE the shims come in different thicknesses so you can dial it right in --- the starter needs to work HOT as well as cold so looser is better we try to get it around .015 jz
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