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NO power in Drive?

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Old 03-29-2012, 02:30 PM
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Exclamation NO power in Drive?
When I shift into drive, my Jeep has nearly no power to move forward. It baaareelly goes when I give it gas. Reverse works fine, and I can shift into 1-2 to go forward no problem, but 3 and D don't work. What's going on? I need this car!
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Old 03-29-2012, 02:38 PM
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I'm going to check my trans fluid real quick..
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Old 03-29-2012, 06:14 PM
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Dang, fluid level is good....what should I check?
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Old 03-29-2012, 06:52 PM
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Go up under the dash on the passenger side. The TCU is located there. In it's harness, wrapped in yellow tape, is an inline fuse for the power to the TCU. REmove it and inspect it.
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Old 03-29-2012, 08:14 PM
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Originally Posted by cruiser54
Go up under the dash on the passenger side. The TCU is located there. In it's harness, wrapped in yellow tape, is an inline fuse for the power to the TCU. REmove it and inspect it.
Thanks will do that right now!
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Old 03-29-2012, 10:14 PM
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Originally Posted by cruiser54
Go up under the dash on the passenger side. The TCU is located there. In it's harness, wrapped in yellow tape, is an inline fuse for the power to the TCU. REmove it and inspect it.
That fixed it....why did it fix it? What's the TCU? Cruiser to the rescue. Again!
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Old 03-29-2012, 10:29 PM
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Originally Posted by shooting sticks
That fixed it....why did it fix it? What's the TCU? Cruiser to the rescue. Again!
Cuz that fuse is inline with the power to the Transmission Control Unit aka TCU.

No power, no shifty.
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Old 03-29-2012, 10:39 PM
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BTW, fuse blown or just a crappy connection?
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Old 03-29-2012, 11:48 PM
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Originally Posted by cruiser54
BTW, fuse blown or just a crappy connection?
Ah I see! Goody. The harness wasn't all the way in..
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Old 03-29-2012, 11:50 PM
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Originally Posted by shooting sticks
Ah I see! Goody. The harness wasn't all the way in..
What harness wasn't all the way in?
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Old 03-30-2012, 12:32 AM
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Originally Posted by cruiser54
What harness wasn't all the way in?
The line that had the fuse in it has a harness at the end that goes to a silver box under the dash and it wasn't all the way in the box. I bet that silver thing is the TCU.
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Old 03-30-2012, 06:29 AM
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Originally Posted by shooting sticks
The line that had the fuse in it has a harness at the end that goes to a silver box under the dash and it wasn't all the way in the box. I bet that silver thing is the TCU.

Sure is. Go drive your Jeep and enjoy it.
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Old 06-04-2020, 10:05 PM
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Hey guys, Hope everyone is holding up in this crazy time. I have a 91XJ that is pretty modified from the PO. Just today i have little power in Drive or 3rd. Reverse/ Low are fine. Very similar situation to this thread.
https://www.cherokeeforum.com/f2/no-power-drive-130218/
I do not seem have a TCU connected. Rather the yellow/ blue/yellow wires are spliced (pic attached). All yellow go together and all blue/yellow as well. Then they are tied into the black unit which i am not sure what to call that has a jumper conductor between the two. I messed around and made sure everything had a solid connection and swapped in a new fuse/ fuse harness to no avail. Anyone have any insight? It was running fine last time i started it, all i did in between was swap in some new speakers and did not mess with that harness at all. I appreciate any info you might have.

Here is a picture of what i believe was the TCU but it is not connected to anything, just wires spliced.
https://www.dropbox.com/s/u1j61si5v5..._0599.jpg?dl=0

Brett.
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Old 06-04-2020, 10:56 PM
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You might get more response if you start a new thread rather than hijacking an old one.
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Old 06-04-2020, 11:08 PM
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Originally Posted by Steve Hayes
You might get more response if you start a new thread rather than hijacking an old one.
I don't consider it highjacking if the OP was resolved and the new post is a similar question. Ultimately there ends up being fewer threads to search through.
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