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Unread 02-03-2012, 09:38 AM   #1
brockj
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2006 LJ Wrangler 
 
Join Date: Feb 2010
Location: crescent city, illinois
Posts: 262
quadra trac sun gear

i am posting this for a friend who is wanting to get all the info he can on the quadra trac with 4lo in his 79 cj7. he is looking into rebuilding it and wants to make sure he can get all the parts he needs. the part he cannot find is the sun gear, or drive sprocket. is there a place to buy these that we cannot find or are you just SOL when it needs to be replaced and have to convert it to part time? he's not sure he needs it yet, just wants to be prepared. any info would be great, thanks

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Unread 02-04-2012, 03:35 PM   #2
brockj
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2006 LJ Wrangler 
 
Join Date: Feb 2010
Location: crescent city, illinois
Posts: 262
anybody?
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Unread 02-04-2012, 05:16 PM   #3
bigredisb
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1979 CJ7 
 
Join Date: Jun 2009
Location: Wisconsin
Posts: 804
Your best bet is to start trolling craigslist for a parts case. Pretty easy to find for 50 bucks or so. Personally I went part time and am very pleased with the results. If he goes another direction later you can always sell part time cases on ebay for some good coin.
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1979 CJ7 aka "Christine" Build Thread: [url]http://www.jeepforum.com/forum/f8/bigredisbs-1979-cj7-build-1025854/[/url]

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Unread 02-04-2012, 06:27 PM   #4
chromegrille
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1947 CJ2A 
 
Join Date: Nov 2006
Location: Riverside, CA
Posts: 481
Well, the sun gear is inside the low range unit and rides on the output shaft of the transmission; the splines can wear between the shaft and the gear, or be wiped out all together to were the vehicle will only move in low range.
Sometimes the short main shaft inside the low range unit is severely worn as well.
The drive sprockets are what the chain goes around; the differential drive unit is what turns the drive shafts; the splines or cones inside these units can be wiped out as well.
If it's simply the low range shaft and gear you need, you can remove the low range, install the cover, and drive around with high range only until suitable donor parts can be located.
Converting to part time eliminates the differential drive unit if that is what you are asking about.
The conversion has no effect on low range operation.
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