 Transmission gurus, please comment, Wear on bearing retainer plate |
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| MrKona |
 Nov 5 2005, 11:32 AM
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#1
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Senior Member  Group: Members Posts: 597 Joined: 25-July 05 From: Santa Rosa, CA Member No.: 4,469 Region Association: None  |
I'm nearing the final stages of a "partial" transmission rebuild. To make a long story short. I started off with my original and a donor tranny. Turns out the donor had a broken shift fork, but no other problems that I can see, all synchros and gears look alright, case bearing races fine. No reason to take the shafts apart, so I'm reinstalling the drive and pinion shafts into a freshly cleaned case with all new gaskets and seals, and a brand new pinion shaft intermediate plate bearing (The old one fell apart in my hand, sound familiar?). I'll use the shift fork from the original transmission.
My concern is wear that I spotted on the bearing retainer plate that mounts on the intermediate plate. First gear had worn a groove in the plate, just less than a mm at its deepest. There was no more metal-on-metal contact, as first gear appears to have completed it's job of clearing away metal. I couldn't see any wear on first gear, tells you how tough these gears are. (As I can tell from the blue goo gasket sealer, this transmission looks to have been part at least once before). Anyone have any ideas what could have caused this... where the tolerances could be off? It's going to nag at me as I'm putting this thing back together. Thanks. By the way, I had the outer case plastic bead blasted and it looks absolutely beautiful. When it's done, I've got to post some before and after pics. I can't believe the difference! Attached thumbnail(s) 
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| brp914 |
Nov 5 2005, 12:26 PM
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#2
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Unregistered |
what can happen is, the 19mm stretch bolt on the pinion shaft decides to back off, allowing 1st driven gear its independence (with disastrous consequences). as this develops, play increases. the mainshaft drives the pinion shaft which turns the ring, but the ring finds it not easy lugging around 2200+ lbs, so the ring shoves the pinion shaft into the intermediate pinion bearing, hammering it to bits. and thanks to the added play, it gets a running start, so to speak.
note the previous post about color coded thickness for the case/int. plate gasket. it sets r&p backlash. btw, the following doesn't relate to anything, but it sure is funny (IMG:http://www.914world.com/bbs2/html/emoticons/dead horse.gif) |
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Posts in this topic
MrKona Transmission gurus, please comment Nov 5 2005, 11:32 AM
bondo Yikes, not sure what would cause that.
As for mi... Nov 5 2005, 11:44 AM MrKona Thanks for the reply.
Oh yah, I'm using the c... Nov 5 2005, 11:53 AM MrKona One more question.... what do you mean by "ring"?
... Nov 5 2005, 11:56 AM bondo Nov 5 2005, 11:57 AM MrKona That old paper gasket is long gone... All I can sa... Nov 5 2005, 12:14 PM MrKona Interesting... it took me awhile to digest that. ... Nov 5 2005, 12:54 PM bondo Nov 5 2005, 01:04 PM davep I think your only option at this point is to take ... Nov 5 2005, 01:19 PM MrKona Thanks guys for your input. It's amazing how ... Nov 5 2005, 03:07 PM McMark Great thread! http://www... Nov 5 2005, 04:02 PM Bleyseng Last set of gaskets I got were all tan too, so I h... Nov 5 2005, 07:38 PM
MrKona I'm glad you said that. I wasn't sure wha... Nov 5 2005, 10:38 PM |
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