If you are talking about the splined ring around the input shaft, it's for the torque converter stator. The stator is like a second set of fan blades inside the converter that redirect fluid to the blades that turn the input shaft. It greatly increases the efficiency of the torque converter, which is actually a fluid coupling. In order to do it's job, the stator must be held stationary, that's what the splined ring is for. Hope that makes sense. It's not easy to explain.
there is usually a metal plate on the transmission itself with that information on it, or you can tell by the number of transmission bolts you have in the transmission pan.
There is a little metal tube stuck in the transmission. TOP SIDE It is hard to see it when it is in a vehicle.
check your fluid, metal shavings could indicate your torque converter is grinding and about to fail, or check that your fluid level is even topped up! (look for leaks) anything else would require removal of the transmission to inspect and diagnose best of luck -level 1 mechanic
Usually the tranny will go first, but it really doesn't matter. Take it to a shop that specializes in tranmissions, or if you want to experience the pain of replacing it yourself, take it out and haul it to a reputable transmission rebuild shop. Either way, they will tell you to replace the torque converter as a wise precaution even if it's not the problem. As there is no way to clean out a torque converter, any muck or metal shavings left in it will just get into your newly rebuilt tranny and ruin it fast. So count on a new converter no matter what. Also, if you replace it yourself, be sure to fill the new converter with fluid before assembly and flush out the cooling lines before hooking them up. One last thing, be sure to spin the converter when you push it into the tranny. You should feel it go in steps, about 3 or 4. If you don't get it in all the way, the converter will shatter the front pump assembly when you tighten the tranny to the engine. Then you'll have to take it back out and get it repaired, and it WON'T be under warrranty.
A flex plate is the metal conector between the engine's crankshaft and your transmission's torque converter or clutch assembly. It "flexes" to take some of the initial force from the clutch or convertor and also aids in abating the vibration transferred between the two components.
Platinum is used as the catalyst in a catalytic converter, because this is a precious metal they can be very expensive.
platinum
On the transmission cooling line connecting to the radiator there is a metal 'C' clip that secures the line into the fitting. Does the plastic ring clip on the line have to snap over top of the metal clip in order to completely secure the line?
A flex plate is the flat piece of metal that connects the engine to the transmission's torque convert. Most have teeth around the edge for the starter to engage into when starting your car.
The first thing to check would be the obvious things such as the linkage and shifter assembly. If all is well, direct your attention towards the Valve body / pump in the transmission which is accessable by removing the side cover. Another common problem is the torque converter strips out where it splines into the pump. If you are not qualified to work on the transmission, i would advise taking it to a professional. Transmissions these days are VERY complex. Mac's Transmissions Houston, TX 281-743-1000
Transmission pans can be cast metal, stamped metal, or plastic.
That method results in a more accurate and even torque.