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Weird shifting issues

Old 02-13-2019, 04:00 PM
  #1  
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Join Date: Feb 2019
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Model: Cherokee (XJ)
Default Weird shifting issues

Hey guys, Iíll try and give as much details as I can. 2004 Columbia. 4.0 42re trans. I got a little muddy water in the trans the other week. Iím a shop foreman for a trucking company, so I drove it straight to my shop and drained it all out. Had no problems at this point. All of our equipment is for heavy duty trucks so I couldnít flush it all the way. So I filled and drained until it looked normal and changed the filter. Ran fine for a couple days and now itís acting up.
When acelerating from a stop. It will not shift out of first until I hit 4200-5000 rpms. When it does shift itís smooth. When itís in the next gear (it feels like 3rd) I have no kickdown. You floor it and it just gradually goes. Downshifting is smooth. Here is what I have checked/done.
-dropped pan for a 4th time, no chunks of clutch packs or metal
-used professional code reader, 0 codes active or inactive on anything
-checked all fuses and relays, replaced the all for the hell of it
-shifting into neutral then back to drive doesnít seem to help
-checked the kickdown cable or I think itís called the throttle position cable
-visually inspected wires and such to the trans.
-trans cooler is not hooked up

Itís not overheating
Using 1st or 2nd gear doesnít help.

Im kind of lost where to look next, it feels like itís maybe a issue with the tcm putting it into limp mode or something. It doesnít feel mechanical.
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Old 03-05-2019, 03:29 AM
  #2  
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Join Date: Nov 2015
Location: syracuse ny
Posts: 1,610
Year: 1997
Model: Grand Cherokee
Engine: 4.0
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Sounds to me like you are underfilled. The dipstick is loony on some of the 42re's. Try putting in another quart.
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Old 03-12-2019, 01:54 PM
  #3  
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Join Date: Nov 2013
Location: North East Georgia
Posts: 94
Year: 1997
Model: Grand Cherokee
Engine: 4.0L STRAIGHT 6!!!
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How can water get into the transmission?


I have had mine 97 grand cherokee bumper deep on several occasions and never thought to worry about anything. I thought everything was all sealed up
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Old 03-13-2019, 12:50 PM
  #4  
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Join Date: Mar 2019
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Model: Cherokee (XJ)
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They should be sealed. The only vent is the dipstick tube. But, a bad seal on the dipstick tube, tcu plug, pan or any of the sensors will let water in. Additionally there is the occasional issue where if you take two hot pieces of metal with a gasket between them and put them in water they can draw water past the gasket, there's a fancy term for this but I forgot what it is, it's similar to the capillary action that draws solder into a joint.
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Old 03-15-2019, 03:32 PM
  #5  
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Join Date: Nov 2015
Location: syracuse ny
Posts: 1,610
Year: 1997
Model: Grand Cherokee
Engine: 4.0
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Just noticed the OP profile says XJ, Also says he has a 4.0 that wont shift until 4500-5k rpm. Not bad for a 4.0...?
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