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Unread 04-05-2004, 02:49 PM   #1
vedder99
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Join Date: Apr 2004
Posts: 1
Tranny Problem! Works in reverse only!

Hey everyone. Thanks for taking the time to read this. I have a 1994 Jeep Grand Cherokee 4x4 V8. Recently the jeep would only go in Reverse. If I put it in D, 3, 2, 1 it kinda revs up but doesnt do anything as far as going anywhere. The shifter is working fine and underneath I can see it shiffting gears. Why would a tranny work in Reverse and not in any other gears???? Do I need to have it fully rebuilt? It gave me error code 12 which is an OUtput Shaft Speed Sensor. Any help would be great. Thanks.

Tyler

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Unread 04-05-2004, 04:06 PM   #2
RockPaws
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Join Date: Jun 2003
Location: Pahrump, NV
Posts: 830
Tyler.. Welcome to the Jeep Forum !
First check your transmission fluid level. Check your owners manual and see if its checked in "Neutral" or "Park" shifter position. It will probably say "Neutral" position.
With the engine running and in neutral, check the fluid level in the transmission. When cold it should be just above the hatched mark or lower position of the 2 indication dots or lines. If thats ok, first try changine the filter and fluid. If you don't feel comfortable with doing it, have it towed to a transmission shop. And have them check it out. If you don't know which shop to go to.. interview at least 3 and go with the best one.

Frank
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Unread 04-05-2004, 04:45 PM   #3
greasefingers
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1994 ZJ 
 
Join Date: Sep 2003
Location: Northern VA, USA, NJ
Posts: 8,237
I have a 94 GC I6 with Quadratrac. My FSM states six possible reasons for all drive gears slipping and reverse gear OK. They are as follows:
1- Fluid level. For the Quadratrac check with engine at operating temperature, on level surface & with the trany in neutral.
2- Gearshift linkage out of adjustment
3- Rear trany clutch failure
4- Transmission overrunning clutch failure
5- Valve body malfunction
6- Input shaft seal rings worn or damaged.
Hope this helps...good luck I had my trany replaced last year for slippage in 2nd & third gears. Cost me $ 1,800 at the dealer.
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Cheers Steve

94 Black Laredo 4-Liter with QuadraTrac (42RE trans & NP249 TC) 200,000 + miles purchased new

88 Cherokee 2-door with 5speed manual 139K miles(deceased) purchased new
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