Auto Transmission - Normal operation ?? -
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Unread 03-03-2013, 09:10 AM   #1
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2007 JK Wrangler 
Join Date: Jul 2009
Location: franklin, tn
Posts: 5
Auto Transmission - Normal operation ??

I have a 2007 JKUR, with 92,000. The auto transmission has developed a 'hard downshift' during deceleration. It doesn't happen all the time, but more than not. Seems only to happen after I have come up to speed and shifted into 4th/od. Then as I begin deceleration, I feel the hard downshifts. If I turn off the overdrive, it doesn't seem to happen. Upshifts are smooth.

I took it the a local transmission shop, and they ran diagnostics, and didn't find any trouble with the unit, at least nothing turned up on their scan tool. They said everything looks good, and suggested a 'reboot'.

The next day, I went to the dealer for my $16 coupon oil change, and talked to the service manager about the problem. He also indicated to try a 'reboot', and told me exactly how to do it(disconnect the battery, touch the cables together to dissipate the capacitors). I tried this but still no luck.

Before I take it back to the dealer, or any where else, for a thorough check, I was curious if any one else was experiencing this issue ?



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Unread 03-03-2013, 10:10 AM   #2
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Thunderstrike's Avatar
2009 JK Wrangler 
Join Date: Dec 2005
Location: Montgomery, AL
Posts: 3,161
Did you change transmission fluid and filter change at 60,000 miles? Try that first. Make sure the fluid is ATF-4 synthetic. Suggest Valvoline.
2009 JK Rubicon (Former Daily Driver); 2014 VW Jetta GLI Autobahn w NAV.
Auto, Power, Remote Start, Towing Package, MyGig Navigation with Lockpick, Rear View Camera, B&M 70268 Transmission Cooler, Aeroforce Interceptor, Valentine 1, Tub Sound-Deadened with Raamat and Ensolite, Hard Top Heat Insulated with 1/2" Styrofoam Insulation, Bilstein Shocks Front & Rear, PIAA Dual Horns, IPF 920H4 Headlights.
Protection: Skid Row Engine Skid, Lower Control Arm skid & Evaporator Skid; Rock Hard Gas Tank Skid; Warn Stainless Steel Differential Skid Front & Rear.
Recovery Gear: Warn 9.5Ti Winch, 11,000# Pull-Pal.
Communication: Uniden 520XL CB, Diesel External Speaker, 3' FireStik Whip.
Shrockworks Mid-width Front Bumper with Warn 9.5Ti Winch -- Ordered 7/17/2009; Bumper Received 12/4/2009.
1" Coil Spacer Front & 1/2" Coil Spacer Rear restored OEM Rake.
4x4 Trips:
Moab - 4/2006, 5/2008, 4/2009, 5/2011, 4/2013
Ouray - 8/2007
Rubicon - 9/2008
Gone, but not forgotten: 2004 TJ, 1999 Audi A4, 1992 VW Jetta GL 5 Speed
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