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Old 06-15-2018, 04:46 PM
Curly5759's Avatar
Curly5759 Curly5759 is offline
232 I6
Join Date: Mar 08, 2015
Location: Verde Valley, Arizona
Posts: 188
Quadratrack question

Cliff notes version, longer below: Can the large plastic thrust washer behind the drive sprocket break apart and get ground up enough to disappear?

I recently purchased a QT as a spare. The clutch cones were bad and one of the cones had no teeth for the drive spines. I think it had regular ATF in it instead of QT fluid.

As I reassembled it to put on the shelf, I noticed the large plastic thrust washer that sits under the drive sprocket was not there. The t-case had obviously been used from the amount of grease/dirt on the bolts, I was the first to disassemble it in a long time. I never saw the washer, didn't move any parts off the bench and I'm the only one who uses the shop. I saw no signs of metal to metal contact between the drive gear or the case and no signs of it in the case. Is it possible for that washer to simply break apart and get ground into nothing?
77 Cherokee S 360/TH400/QT
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Old 06-16-2018, 12:13 PM
wiley-moeracing wiley-moeracing is online now
350 Buick
Join Date: Feb 15, 2010
Location: arizona
Posts: 976
or someone forgot to put it in the last time it was opened up. I have a rebuilt quadratrac with part time kit and spares also if needed
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Old 06-21-2018, 05:50 AM
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fulsizjeep fulsizjeep is offline
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Join Date: Aug 21, 2002
Location: Jubilee Jeeps.SWCO
Posts: 22,233

I have seen the inside of many QTs. A few of them were missing the thrust washer but never saw evidence of one being chewed into nothing. I've seen the tabs broken off however. The drive sprocket will eventually grind into the back half of case when it is not there.
Ran when parked.
88 GW, 401/727/208, 5" lift, D44s/4.10s/locked up, 35s and a few Evil Twin mods, and a few TT's Fabworks mods,
76 401 Wag, 77 401 Wag, 77 401 J20

Last edited by fulsizjeep : 06-21-2018 at 06:04 AM.
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