94 ZJ at 4ooo RPM's at 60mph
01-09-2012, 10:33 AM
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Year: 1994
Model: Grand Cherokee
Engine: 4.0L
94 ZJ at 4ooo RPM's at 60mph
I have a 94 jeep grand cherokee with a 4.0 and automatic transmission. Driving down the road on any time of grade at all it will hit 4000 rpms at 60 mph. I can take my foot off the gas and it will up shift and go down to about 2k rpms but when i step on the gas at all it will down shift and hit 4000 rpms again. Any answers would be appreciated. The jeep also has 208k miles on it.
01-09-2012, 03:31 PM
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Year: 2016
Model: Grand Cherokee (WK2)
Engine: 5.7l HEMI
I would first listen to 721 and check the fluids.
If thats good then you can try switching the Transmission relay with a non essential relay, say the horn. Then take her for a spin, if that cures it then you know you need a new relay. If it doesn't, then you may need to replace the Trans Control Module (TCM). These transmissions, while they are hydraulic in operation, they are electrical in management. When the trans goes that high in RPMs only to do 60 tells me that your TCM may have gone into Limp Home mode. I wouldnt drive it anymore as you may fry the trans itself.
The relay would be in the fuse / relay box under the hood and may be labeled as the EATX. Hope this helps, Good Luck
If thats good then you can try switching the Transmission relay with a non essential relay, say the horn. Then take her for a spin, if that cures it then you know you need a new relay. If it doesn't, then you may need to replace the Trans Control Module (TCM). These transmissions, while they are hydraulic in operation, they are electrical in management. When the trans goes that high in RPMs only to do 60 tells me that your TCM may have gone into Limp Home mode. I wouldnt drive it anymore as you may fry the trans itself.
The relay would be in the fuse / relay box under the hood and may be labeled as the EATX. Hope this helps, Good Luck
01-09-2012, 03:58 PM
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Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Yeah, it has a throttle pressure cable (aka kick down cable). Check the fluid first, and if that checks out, do a search for the throttle vavle cable adjustment proceedure and give it a shot.
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01-10-2012, 02:40 PM
#8
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
cant find a pic of grand cherokee cable there should be a cable similar to this on your throttle body find it then follow these instructions
Last edited by freegdr; 01-30-2012 at 04:03 AM.
01-10-2012, 03:49 PM
#9
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Year: 1994
Model: Grand Cherokee
Engine: 4.0L
I just tried the cable thing and. Checked the fluid..my cable didn't have a button on it so I unconnected it from the throttle and just pulled it and let it go back in..hopefully it works unless I did it wrong lol
01-11-2012, 01:59 AM
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Year: 1993
Model: Grand Cherokee
Engine: 4.0L I6
check the TPS. I had a bad TPS and it shifted way to early. I then got a new one but that was bad too, dont buy the cheapest one. You can meassure it with a volt meter, but it can still look good since you cant meassure it 100%.