45RFE Transmission Only Shifting Manually - North American Grand Cherokee Association
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Old 05-11-2017, 04:26 PM   #1
1997Cobra
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Join Date: Nov 2012
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Default 45RFE Transmission Only Shifting Manually

Background:

99 Grand Cherokee Limited
4.7L
45RFE

Bought this one as a fixer, not realizing how bad it really was. I bought it with a massive gas leak, so I didn't get to test drive it long. After fixing the gas leak, I realized the Trans was doing the 2-3 only shift (among other things). Replaced the trans with a JY trans out of the same year. Now, it is not shifting automatically. I put it in 1, it goes into 1st, 2 goes into 2nd, D goes into 3rd (will not downshift out of it either).

I've found a number of threads about limp mode, but that is not what is happening (at least I suspect it isn't limp mode). Anything in specific I should look for? I am at a loss, the thing shifts good and overall seems healthy.
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