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Unread 01-20-2013, 06:59 PM   #1
ReddDawg
Registered User
1994 YJ Wrangler 
 
Join Date: Apr 2011
Location: Southaven, MS
Posts: 140
Another year another challenge

Used motor. Used transmission. Everything working great. Jumped in it today to leave the park where we had been mountain biking and just before we turned onto the road it sounded like someone shot the bottom of the Jeep with a bb. Clear, crisp, on the floor pan. (sounds like) I start to drive off and
no speedometer.
Before I get halfway home my woody is beating my Borla muffler into submission. Jamb nut on the yoke came off and at interstate speeds the shaft came loose. Fortunately we are high enough for it to not hit pavement. Anyway reassemble and get home. Disassemble to review. No damage found and everything is solid. (output shaft, etc)
I pulled the speedo cap and the driven gear (yellow) was literally melted along the edge towards the stem. Finger into the hole and I can feel a groove on the drive gear. It was working up until a few hours ago. Drove the thing home so everything is still (theoretically) turning. The driven gear turns fine in the unit.

Any ideas?

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Unread 01-20-2013, 07:12 PM   #2
Mark05059
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1989 YJ Wrangler 
 
Join Date: Mar 2009
Location: quechee Vermont
Posts: 4,300
Ill bet you got no fluid in there and its not liking it
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1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
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Unread 01-29-2013, 04:39 AM   #3
ReddDawg
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1994 YJ Wrangler 
 
Join Date: Apr 2011
Location: Southaven, MS
Posts: 140
Starting point

I guess I will find out a little more when I drop the tail shaft to replace the drive and driven. I have driven it a little locally but have not engaged 4wd yet but everything "seems" to be functioning. It does look like I had a leak at the tail shaft but there is no markings in the driveway. Thank you for the feedback.
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Unread 02-26-2013, 09:27 AM   #4
ReddDawg
Registered User
1994 YJ Wrangler 
 
Join Date: Apr 2011
Location: Southaven, MS
Posts: 140
Wow

When sitting at a light with the clutch in and the tranny in gear there is the sound of a tortured cat coming from the bell housing. Before I could look at that...

Coming home from the same mountain bike trails with the same child as the drive shaft separation we almost got home before there was a great clatter as we were coming off the exit ramp. Smart butt in the passenger seat says "what now" which really helped. As long as we're under throttle there is no noise. Creep home and drove into the driveway that we normally back into. Good thing as when I went to back it up it was no go. Engage 4WD and back it up, park in the driveway and get out to inspect.
Pinion is flopping like a flag in a light breeze. Pulled the cover and find a race and many needle bearings. Good amount of fluid so it's probably just age but still!

Going to do the locker while I am in there.
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Unread 02-26-2013, 09:33 AM   #5
seattle_yj
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1993 YJ Wrangler 
 
Join Date: Jun 2012
Location: Issaquah, WA
Posts: 948
Sorry, this post is painful to read.
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Unread 02-26-2013, 11:44 AM   #6
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,756
Ouch. I think the child needs to be educated..... It's just a Jeep thing. Fix it, break it, and fix it again!
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