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transmissions slips after warming up.


 
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94 jgc
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Joined: 28 Jan 2007

PostPosted: Sun Jan 28, 2007 4:31 pm    Post subject: transmissions slips after warming up. Reply with quote

i serviced my differentials,new fluids in front and rear.new u-joints front and rear.replaced np 249 transfer case with another.pulls just fine until 4 or 5 miles out.stop at stop light and the tranny starts slipping and gradually no pull at all.just had tranny rebuilt a year ago.makes a roaring noise that increases and decreases with speed of truck.need help,please.i love my gc dont wont to give up.
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Brad The Best
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Joined: 14 Jan 2007
Location: Kamloops B.C Canada

PostPosted: Sun Mar 18, 2007 9:38 pm    Post subject: Reply with quote

take it back to were you got it rebuilt , if its not working right after a year then they should fix it
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wan2live
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Joined: 28 Apr 2007

PostPosted: Sat Apr 28, 2007 8:07 pm    Post subject: Reply with quote

I have a similar problem.

I started slipping and the trani would not shift out of first so I replaced the filter and fluid it shiffted fine until it got to temp and started to slip or act as if it was slipping, reverse is fine it is just at temp it seems to slip any suggestions since alot of people keep saying it is something simple but I am at a loss.

edited to add more info

When I dropped the pan the fluid was a darkish brown and there was alot of sludge.
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Brad The Best
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Joined: 14 Jan 2007
Location: Kamloops B.C Canada

PostPosted: Mon Apr 30, 2007 9:07 pm    Post subject: Reply with quote

change the fluid again , you might need new clutches . i would keep trying new fluid you have to get that gunk out of there
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Tardis
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Joined: 07 Aug 2004
Location: Ohio

PostPosted: Sun May 06, 2007 9:56 pm    Post subject: Re: transmissions slips after warming up. Reply with quote

94 jgc wrote:
the tranny starts slipping and gradually no pull at all.just had tranny rebuilt a year ago.makes a roaring noise that increases and decreases with speed of truck.need help,please.i love my gc dont wont to give up.

It sounds like the pump/planetary set might be on their way out. Most tranny shops will reuse as many parts as they can to keep cost down, and profits up. This means reusing or rebuilding bearings, clutches/steels, planetary sets, pumps, sprages, etc. A roaring sound followed by slippage indicates a bad pump, bad planetary set, bad bearing(s) etc. If the shop remanned your trans pump onsite, they might've pressed the wearing ring in crooked, or put a worn impeller back in which makes a hell of a noise after about 6 months of driving. I've been there, and done that with a 700R4 years ago. My 700R lasted 8 months after I paid a guy for a crap rebuild. The front pump was screaming, the sprage was wasted, and the trans barely shifted. I rebuilt it again myself and had no problems afterwards.
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