99 grand cherokee stuck in 3rd gear.... - JeepForum.com

 
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post #1 of 10 Old 10-15-2009, 11:13 AM Thread Starter
jaders
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99 grand cherokee stuck in 3rd gear....

my 99 grand cherokee is stuck in 3rd gear. it the automatic V8 4x4 model.
any ideas as to why its stuck or how i can fix it??

thanks

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post #2 of 10 Old 10-15-2009, 11:15 AM
Ender42
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We need more information on the situation. Is it always stuck or just certain times. Also what is you t-case ect...

99 WJ 4.0l Selec-trac. 6.5" Hybrid lift, 33/12.50/15 Maxxis Bighorns, JKS Adj. trackbar. Rancho Stabalizer.. JKS Disco's, Tom Woods Double Carden Driveshafts

76 CJ7, 4.2l I-6, 2 inch body lift

Greater love has no man than this, than he who lay down his life for his friends.
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post #3 of 10 Old 10-15-2009, 11:28 AM Thread Starter
jaders
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it started this morning and was stuck in 3rd all the way to work. hadnt had a problem until then. the transfer case is a 247.
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post #4 of 10 Old 10-15-2009, 11:29 AM
txtumbleweed
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Sounds like it has gone into "limp home" mode. Possibly a bad input/output speed sensor (easy to fix).

See if you are throwing any codes (do the key trick):
Jeep Grand Cherokee WJ - Diagnostic Trouble Codes

Y2K WJ 4.7
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post #5 of 10 Old 10-15-2009, 11:58 AM
Ender42
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Quote:
Originally Posted by txtumbleweed View Post
Sounds like it has gone into "limp home" mode. Possibly a bad input/output speed sensor (easy to fix).

See if you are throwing any codes (do the key trick):
Jeep Grand Cherokee WJ - Diagnostic Trouble Codes

That's exactly what I was thinking. there should be a thread about that on here somewhere.

99 WJ 4.0l Selec-trac. 6.5" Hybrid lift, 33/12.50/15 Maxxis Bighorns, JKS Adj. trackbar. Rancho Stabalizer.. JKS Disco's, Tom Woods Double Carden Driveshafts

76 CJ7, 4.2l I-6, 2 inch body lift

Greater love has no man than this, than he who lay down his life for his friends.
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post #6 of 10 Old 10-15-2009, 12:20 PM
Mopargearhead
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Yeah, your Jeep is stuck in limp in mode. There are many things that can cause a transmission to go into limp in mode though. See if you have any DTCs like tumbleweed suggested.
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post #7 of 10 Old 10-15-2009, 03:31 PM
Radimus
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I had the same problem, changed the speed sensors, but it still occured. You can try the speed sensors, there's 2, $100 for both, but after I did the sensors, I ended up plugging in a scanner and finding codes, pm me for the exact code #'s but the codes said lack of power to tcm, which could be a short in the solenoid, and the others said low tranny fluid line pressure, which could mean plugged filter or line. Seeing as this is a notorious problem on wj's, a mechanic buddy of mine threw a new solenoid unit in his daughters wj and it was fixed. Another thing may be the tcm/PCM may need a flash

JEEP eNVy
Lake Tahoe, NV
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post #8 of 10 Old 10-15-2009, 03:31 PM Thread Starter
jaders
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thanks for the help!
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post #9 of 10 Old 10-15-2009, 03:33 PM
Radimus
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One more thing, one last code was thrown on mine saying my tranny overheated. First, before you spend any money, my reccomendation would be to plug a scanner into it and get codes. Then go from there. Remember, this is coming from someone with the same experience that tried speed sensors as a solution

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Lake Tahoe, NV
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post #10 of 10 Old 10-19-2009, 04:32 PM
Radimus
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4.7 needs a makeover

I apologize, I thought the reply I posted was a new thread

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Last edited by Radimus; 10-19-2009 at 05:07 PM. Reason: Mistake
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