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TSB 21-015-05

B45RFE / 545RFE Trans - Delayed Engagement Due To Cooler Return Filter Replacement

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Date: September 01, 2005 

Models: 2003 - 2006 (DR) Ram Truck

2000 - 2004 (AN) Dakota
2000 - 2003 (DN) Durango
2003 - 2006 (DR) Ram Truck
2004 - 2006 (HB) Durango
2002 - 2006 (KJ) Liberty
1999 - 2004 (WJ / WG) Grand Cherokee
2005 - 2006 (WK / WH) Grand Cherokee
2006 (XK) Commander

NOTE: This bulletin applies to vehicles equipped with a 45RFE or a 545RFE automatic
transmission (sales code DG4 or DGQ respectively).

The customer may experience an initial delayed shift engagement following an extended off
(not running) period of time, generally after being parked overnight. The initial shift engagement
may feel like a delay or slip when a transmission gear (reverse or drive) is first selected after
engine start.

The customer may not have experienced the delayed shift engagement until after the
transmission has been serviced, where the cooler return filter was replaced during the service
and/or repair.

The condition is not detrimental to the transmission but may cause concern with the customer.

The above condition may be caused by a suspect cooler return filter a part number of
04799662AB. This “AB” suffix / level filter may allow transmission fluid to drain back out of
the torque converter. The drain back condition may occur over a period time when the engine
(and transmission) are not running. With less fluid in the torque converter a delay in gear
engagement may occur at engine start up while the torque converter fills to its proper fluid

All 04799662AB cooler return filters with the “AB” suffix are suspect. The above condition may
be corrected by replacing a suspect “AB” filter with a new cooler return filter whose part
number is 04799662 (with no suffix or with a suffix that is other than the “AB” level).

NOTE: The cooler return filter, p/n 04799662, will not be available until
September 09, 2005. The filter part number is stenciled on the side of the filter

NOTE: A replacement 04799662 cooler return filter may come packaged with a
separate threaded adapter stud. The threaded adapter stud is used to attach
the cooler return filter to the transmission. Inspect the stud and note end
without threads. Install the stud end without the threads into the cooler return
filter and tighten the stud-to-filter connection to 18.6 Nm (165 in. lbs.). Once the
threaded adapter stud has been installed to the cooler return filter, install the
assembled cooler return filter to the transmission and tighten the filter to
14.1 Nm (125 in. lbs.)


FIGURE 1 - Transmission Filters - 4X4 Shown


Policy:    Information Only

I would like to thank Bob Bergevin, Arthur Cantrall, Barry Drodge, David Lovell, Bill Maurits, and Steve for supplying the information for these bulletins. And a big thank you goes to Geno's Garage for making possible.


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This page was edited on: May 3, 2004