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Wanted to share this with the forum. I just placed the order so we shall see if it turns out as good as I'm hoping for. The bearings in my 3 speed manual tranny were as follows: pp# MRC207 SFG (main pinion drive bearing shielded one side),##note##thxs to DB4YA I knew the shielding on one side was important and has to be there. pp#MRC207 S (main shaft front bearing) pp#MRC206 S (main shaft rear bearing) My understanding is that the main pinion drive bearing is typically the one that will go bad 1st, and sure enough when I checked these (as instructed by PlymouthyAdams) it was the one of the three that was noisy. Wasn't finding much on the MRC part number, however did find where it had been previously discussed here on the forum once before, and DB4Ya had helped another member cross the original Mopar part number (619167), over to a Federal Mogul p# of 1207SL....I thinking like other company's and in respect to the economy, they can sell off/ merge/ etc...seems like business as usual these days, anyway - the best luck I was having on the 1207SL part number was under Timken. The bearing looked correct by description, so I'm thinking Federal Mogul and Timken may all be the same now,.. lastly here, I'm a newbie, that's learning,..but even I can understand the importance of quality in respect to bearings,...and Timken is a name I've seen since I was young..however today when I discovered that MRC is a division of SKF,and that they were USA made, I purchased a full replacement set (all 3 bearings) MRC207SFG, MRC207S and MRC206S, for a total of $42.00 + $13.00 (4 day shipping) = $55.00 to my door from locate ballbearings.com. According to the Fella I spoke with (Mark Hoffman, see the info below), by ordering through him, I cut out the middleman....he told me he stocked and sold quite a few of the bearings I purchased, that he recognized the numbers, etc...course, only he and the man upstairs know if that's actually true or not. Typically I've learned, " if it seems to good to be true, it probably is - too good to be true ", so I was/still am a bit skeptical, but I needed to make a decision and pulled the trigger and ordered from them....so well see, I suppose. Just wanted to share this info with the group, as the prices I was getting on a Timken 1207SL bearing were ranging from around $70 + shipping and upwards towards a $ Benjamin. I'll follow up with this, once they are received, etc.. Mark HoffmanLocate Ball Bearingswww.email@example.com St. Charles Place, Suite BPalm Desert CA 92211 Steve
My 1st time to ever be inside any transmission. (manual or automatic), besides doing fluid/filter changes.. I've attached some pics to try and show some of the things that were obvious upon tear down, even to the untrained eye like mine. Like many I suppose that have sat for years without proper maintenance, this transmission shows signs of moisture exposure. I can see it on some of the gear teeth (2nd gear especially), on one of the shift rails, and a couple of spots on the mainshaft. Looks very similar to the black etching I've seen in the past on spindles when I've greased wheel bearings, on something that's been ignored. You can see this black corrosion etching, but you can't feel it with your fingernail,...so I'm wondering if I can just polish it away and re-use the parts ?? Most gear teeth edges look sharp, (I did see one small gouge in the edge of a tooth on 2nd gear, it's visible in the attached pic),...the leading and trailing edges of the teeth on 1st gear caught my eye with some random gouge spots and a uniform pattern of lines that looked so uniform and consistent I am guessing them not to be wear or damage related, but again that just a swag on my part Reverse idler gear has some rough edges on some of the teeth...again, most of the attached pictures came out good enough and close enough that you can see what I'm talking about. Any help from you Old tranny pros., would be valued like GOLD on this end. I'd expect that gears would be hard and iffy to find, so I'll massage on any of these parts for as long as required, in effort of getting this back together in a way that's practical and driveable. (I've seen folks on TV, use a whit stone to smooth out spots on the edges of gear teeth, when a replacement gear was just not available, but of course, I'm talking about T.V. ??,...one of the best places to pick up accurate info, right ? !! Reason for teardown : Bought the car 3 yrs ago, test drove it under 30 mph around the block a few times, all shifting was good and smooth as any 3 speed I've ever driven (except for 3rd gear), it flat didn't want to go int 3rd and ground like crazy when you tried it.....(older fella I bought the car from was convinced in showing me that it would go into 3rd gear, and after a bunch of grinding he finally did get it to go,...didn't really sit well with me, but I hadn't purchased the car yet,...later course, I figured even with the xmn issues, the car seemed like as good of a price for a coupe as complete and clean as this, so obviously it bacame mine :).. Over the past few years - here on the forum, two things I did pick up in regards to this were 1: badly deteriorated rear motor mounts can cause this shifting problem, and 2: use of gear oil other than GL-1 can cause wear that will contribute to xmn failure),....YES, there was just about nothing left of the rear motor mounts, which have now been replaced, and YES, when I drained the gear oil out, I did see a lot of very small brass/gold-ish metal particles in the gear oil...(once you take the xmn apart you see that the stop rings and the end play washers are the only two parts that would provide for this brass particle wear due to the later GL series oils, not being compatiable. I have learned to look at the grooves on the inside surface of your stop rings, and both my stop rings look good in that respect with deep grooves still in place, therefore I'm suspecting the end play washers to be the main culprits for the gold metal I could see in the old oil. Attached pics are as follows: 1) 2nd speed gear corrosion and gouge spot , 2) main shaft corrosion spot - one of a couple), 3) shift rail - not very clear but corrosion spot like on main shaft, 4) tranny parts layed out, 5) 1st gear showing lines and shiny wear on teeth edges, 6) reverse idler gear - has quite a few gouges in the edge of the teeth unfortunately doesn't show up very well in the pic.