I have a 2006 Liberty 2.8CRD. I had to replace the TCM about a year & a half ago due to it failing. I am now having many of the same issues(jerks mightily into reverse, but slips & won't shift in drive, throwing P0700 code). I dropped the valve body & solenoid yesterday & cleaned them well, filled the transmission back up & it is back to doing the same issues. If anyone can give me any ideas I would greatly appreciate them. Thanks.

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2006 Jeep Liberty Limited 2.8RCD with K&N filters, Weeks Stage 1 Mod.
2007 Jeep Grand Cherokee 3.0CRD with K&N filters, Diablo PowerPuck & soon to be doing EGR & DPF delete.

The TCM's are really tough. I wouldn't be surprised if the TCM swap just reset some pin connection to the TCM. I chased all these issue hunting P0700 and P0714 codes. Ended up it was a shorting wiring harness from the TCM to the transmission. Took 6 months to figure out on and off with the symptoms coming and going. Found it near the A/C reservoir on the passenger side firewall.

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Purchased 2006 LIberty CRD 82K 01/16
SS Cat Back Exhaust, Full EGR Delete,Provent, Michelin 245/70 R16 AT/2
Stock Tune, Serpentine Belt Service,160 Amp Alternator
10/17 96K, New Head, Injectors, ARP Studs, HDS T-Stat
04/18 99K, New Reman Trans
09/18 104K, Lift Pump
01/19 106K, OME Lift, Eaton TruTrac LSD in new rebuilt diff

I really appreciate the info. I am going to start tracing wires today. Thank you again.

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2006 Jeep Liberty Limited 2.8RCD with K&N filters, Weeks Stage 1 Mod.
2007 Jeep Grand Cherokee 3.0CRD with K&N filters, Diablo PowerPuck & soon to be doing EGR & DPF delete.