Mine is completely stock, no tsbs or mods, and at light throttle, the shift speeds, indicated by the speedometer are below..
1st to 2nd 11mph
2nd to 3rd 20mph
3rd to 4th 36mph
TC lockup 53mph
4th to 5th 63mph

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2006 CRD Sport,
Born on 5-20-2006 @ 7:20pm
Jeep Green, Oil drain valve
Tow Package, Transmission skid plate
EHM2, ORM,
Current mileage 79,000.
Past Jeeps: 63 CJ5,
1994, 1995, 2000 Cherokee,
1995, 1997, 2003 Wrangler

Have had no TSB's or been to the dealer since purchase in Oct 05. TC lockup at 51 mph and 4th-5th at 58 MPH. Got my recall notice the other day for F37 and they said I also needed F23. What is F23?

F23 are the lower ball joints. I need them also.

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2006 Liberty Sport CRD
Born on 2-6-06, Purchased on 4-21-06
Everything Stock...for now.

My shifting & vehicle is identical in every way, except for the born-on as in sig. Also, downshifts to 4th at 58 mph. Not listed for F37, yet...

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2006 Jeep Liberty Limited CRD w/275000 miles

I have always thought mine was odd, and your numbers seem to confirm that. I don't usually care about the first three gears, but mines seems to go 1-2-3-4-5 and THEN the TC locks. I know the TC isn't locked because I can make the RPM's fluctuate more than the speed. (500 RPM +/-)

Are these trannies supposed to lock the TC in 4th?

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OLD RIDE: 2005 Liberty Sport 4x4 CRD - Inferno Red, Sunroof, Cruise, Tint, Tow Package

NEW RIDE: 2008 Flame Red JK Unlimited X 24S Dual tops, Auto, PW/L, Infinity Sound system, Sirius, Tow pkg, side steps
Added: Black fuel door, 7 pin Trailer lights, uConnect + iPod kit, bikini top, AutoPage 2-way alarm, Flexatrunk

Mine locks up in 4th as well as 5th, so I'm hoping so...

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2006 Jeep Liberty Limited CRD w/275000 miles

I've had F31, and some other flash corrections, but not F37. Your numbers match my CRD's current behavior.

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Thanks,
Ken Jennings
2006 KJ Limited 4x4 CRD, Option Pkg G, Lt. Khaki, Built 1 Feb 2006
Tow Package for myself, EVIC TPM
Side Curtain Airbags for my daughter
http://www.kenjennings.cc/crd/dieselexp.html

From some of the posts I've read, the flash part of the F37 is identical to the F31. Some who have had the F31 are reporting that the F37 is not requiring a reflash because the system shows it to be current. At least I think that is what they meant.

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Matt B.

05 Limited CRD. Bought it new. 112k on the clock now.

GDE Eco-tune, rear differential drain plug (drilled and tapped the pumpkin), transmission pan drain plug, Fumoto oil valve, fuel filler neck restriction removed, front hitch, Hayden fan clutch, Sears P1 battery since 08, Mobil 1 5w40, 5 volt glow plugs, DIY timing belt at 109k

Perhaps once the vehicle is back in the dealer's hands they looked the VIN up on the computer and saw F31/prior flashes had not been done, and used the opportunity to do it? Last time I took my CRD in for an oil change I ended up with The Ball Joint Replacement, because it popped up on the computer for them and they happened to have the parts on hand.

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Thanks,
Ken Jennings
2006 KJ Limited 4x4 CRD, Option Pkg G, Lt. Khaki, Built 1 Feb 2006
Tow Package for myself, EVIC TPM
Side Curtain Airbags for my daughter
http://www.kenjennings.cc/crd/dieselexp.html

I have ask this before on different posts, but.... If I am NOT listed on the jeep web site for ANY recalls, does that mean that I have the latest flash, and pump, and TC? I may call DC and see if they can look it up as well. Any thoughts?

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2006 CRD Sport,
Born on 5-20-2006 @ 7:20pm
Jeep Green, Oil drain valve
Tow Package, Transmission skid plate
EHM2, ORM,
Current mileage 79,000.
Past Jeeps: 63 CJ5,
1994, 1995, 2000 Cherokee,
1995, 1997, 2003 Wrangler

If I were you I'd be very, VERY happy. I hate the fact that my factory installed transmission and transfer case has been out and back in.

As for the pump, NO ONE has it stock from the factory. It was not introduced for this transmission (used in the pickup trucks as well as our CRDs) until model year 2007 vehicles began production. The pump fails from excessive heat, caused by the improper programming for the transmission and pump we were given. It was good for the diesel, but the pump did not move enough transmission fluid through the transmission at the diesel's low RPM, thus, torque converter slips, thus generates excess heat, ect, ect, ect until the pump and/or torque converter fails.

The replacement torque converter is the same one I had originally, and I have the same pump as they did not/would not replace it - even though I operated under faulty programming for 14,100 miles. There is a very high probability that the last few CRDs have the latest software programming in them to control shifting - thus - if your one of them, your in the best position of any of us as your all new, with no mileage on any of your drivetrain components using faulty software in the computer.

You definitely have the new design lower ball joints - so for now - your not in any recalls and should be quite happy.

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'05 CRD Sport born on 06/20/05, bought on 9/23/05, L.O.S.T. on 9/27/05 - modding ever since:

Daystar 2.0" Lift, P255/70R16 Revos, Boulder Bars, Reese Front Hitch w/9k Hooks, Poison Spyder Rock Ring, MOPAR Skids/Bug Shield/Roof Rails/Mats, WARN Hitch Shackle(Rear), 10k Hitch Hook(Front), Custom Tilt/Slope Meter, Ammo Box Mod, Rotella T 5W-40.