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AW4 problem or feature?

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Old Oct 28, 2020 | 12:02 PM
  #1  
Tccolv's Avatar
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From: N. Carolina
Year: 1995
Model: Cherokee (XJ)
Engine: 4.0
Default AW4 problem or feature?

I recently purchased a stock ‘95 XJ AW4 4.0 4x4 with 80k miles. While driving in the mountains I’m noticing I have no 2nd gear for descents. D to 3 is fine. When I shift into 1-2, it will only go to first gear regardless of speed. I’ve done some testing- Accelerating from a stop in 3, I get all three gears. Accelerating from a stop in 1-2, it stays in first, never shifts to second even at very high rpm. I readjusted the TPS, checked resistance of the solenoids at both the TCU and connector and getting 11~14ohms. Removed the TCU fuse and did the drive test. Works as it should. No visible wire damage that I can find. Wondering if anyone has any ideas on this before I take it to a trans shop. Thanks.
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Old Oct 28, 2020 | 12:32 PM
  #2  
boxburn's Avatar
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From: United Kingdom
Year: 1995 RHD
Model: Cherokee (XJ)
Engine: 4.0l
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When in 1-2 you should get 2nd gear at about 40 MPH which is around 5K RPM. As you are getting all gears when driving normally your solenoids are working as they should.
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Old Oct 28, 2020 | 12:52 PM
  #3  
Tccolv's Avatar
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From: N. Carolina
Year: 1995
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Engine: 4.0
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Wow, went to try that. Thought it was going to explode but damn...it shifted around 40. Thanks!!! Would be nice to figure out how to lower the shift point and/or how to better use 2nd gear for mid-speed engine braking but I’m glad it’s working. Thanks again.
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Old Oct 28, 2020 | 01:09 PM
  #4  
boxburn's Avatar
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From: United Kingdom
Year: 1995 RHD
Model: Cherokee (XJ)
Engine: 4.0l
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Not that I do it often but the engine sound at 4-5k is sweet just before it changes into 2nd.

I think the only thing you could do to get a lower shift into 2nd would be to wire in your own switch which can manually turn on solenoid #2 to force 2nd gear when the TCM is requesting 1st. I believe there are kits out there to do this but I wouldn't even know the sort of websites to look on myself.


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Old Oct 28, 2020 | 01:24 PM
  #5  
Tccolv's Avatar
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From: N. Carolina
Year: 1995
Model: Cherokee (XJ)
Engine: 4.0
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Thanks. A shift kit sounds interesting but trying to keep this think pretty close to stock.
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Old Oct 28, 2020 | 01:31 PM
  #6  
Griffyorcono's Avatar
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Model: Cherokee (XJ)
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https://nickintimedesign.com/product...fter-jr-v1-96/

Basically turns an auto into a manual without a third pedal from what I've been told by the creator. I also know without a shadow of doubt that if the installation didn't go well if you contacted Nick he would help you.
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Old Oct 28, 2020 | 01:33 PM
  #7  
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From: N. Carolina
Year: 1995
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Engine: 4.0
Default

Hmm, that looks interesting. Will definitely check that out. Thanks.
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Old Oct 28, 2020 | 01:34 PM
  #8  
boxburn's Avatar
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From: United Kingdom
Year: 1995 RHD
Model: Cherokee (XJ)
Engine: 4.0l
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I knew someone would have a link to a kit.

Plug and play so could be removed without a trace, as long as you don't drill any holes for mouting bits of it.
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Old Oct 28, 2020 | 08:49 PM
  #9  
doublechaz's Avatar
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From: Prescott, AZ
Year: 1988
Model: Cherokee (XJ)
Engine: 4.0
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I don't have that module from nickintime, but I have the REM module from him that reads out the ECU data so you can see it while driving. I really like it.
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