545RFE Filter and Pan Service Guide: Both Filters, Torque Specs and Fill Procedure

A 545RFE pan drop looks like every other fluid service until you notice the second filter. Chrysler built this transmission with two: the usual sump filter inside the pan, plus a spin-on cooler return filter that catches debris coming back from the cooler before it reaches the pump. Plenty of quick-lube services change the one under the pan and never touch the other. Then a few of them change the cooler filter with the wrong part and the truck comes back with a delayed engagement every morning. This guide is the full job the way Chrysler lays it out, with the torque values, the fill numbers and the two filter mistakes that cause comebacks.

Everything here applies to the 45RFE as well. The two units share the case, pump, valve body and filter layout; the 545RFE adds a fifth gear. Chrysler revised filters and pans over the production run, so confirm part numbers against the VIN before you order.

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Recommended 545RFE parts

Filters, a drain-plug pan, and the solenoid pack kit if the service turns up more than dirty fluid. Secure checkout.

545RFE Transmission Solenoid Pack and Filter Kit

$255.99View part

45RFE 545RFE 65RFE 68RFE Transmission Filter Kit, 4WD

$30.99View part

Dorman 265-870 Transmission Oil Pan with Drain Plug for 65RFE 68RFE 545RFE

$106.99View part

When Chrysler Says to Service It

Chrysler's maintenance schedule for the 2007 Commander (a 545RFE application) splits service into Schedule A and Schedule B. Schedule B is for vehicles that see any of these: temperatures below freezing, stop-and-go driving, a lot of idling, dusty roads, short trips under 10 miles, sustained high speed in weather above 90°F, trailer towing, heavy loads, commercial use, or off-road driving. Chrysler adds a note that most vehicles are operated under Schedule B conditions (Chrysler Maintenance Schedules).

On Schedule B, the transmission items are:

• 60,000 miles: drain and refill the automatic transmission fluid and replace the main sump filter.
• 120,000 miles: drain and refill, replace the main sump filter and the spin-on cooler return filter (if equipped).

So the factory interval changes the cooler filter every other service. That is the minimum. On a truck that tows, idles in traffic or has ever run hot, I change both filters every time the pan comes off. The cooler filter costs little compared to what it protects, and it is the one filter in the system that sees everything the cooler and converter shed.

What You Are Working With: Two Filters, Two Jobs

Chrysler's description of the 545RFE says it plainly: dual filters protect the pump and other components, with a cooler return filter added to the customary main sump filter. The same passage notes the lube and cooler circuits are independent, so the transmission keeps normal operating pressure even if the cooler is blocked or the fluid is too cold to flow (Chrysler 545RFE Operation). That design is good for the transmission, but it means a clogged cooler filter will not announce itself with a pressure code. It just cuts cooler flow while the unit keeps shifting.

The parts you are dealing with, cross-referenced from Raybestos' filter catalog:

• Cooler return filter (spin-on): Raybestos 515489, replacing OE 5179267AD and earlier numbers including 4799662. Raybestos notes it uses the updated OE anti-drainback valve design (Raybestos 515489).
• Sump filter, 4WD 1999-on and 2WD 2010-on: Raybestos 515492, replacing OE 05013470AA through AE, a metal and plastic filter with a lip seal and valve (Raybestos 515492).
• Sump filter, 45RFE and 545RFE 2WD: Raybestos 515494, replacing OE 04800029AA and 05015267AC.

The 2WD and 4WD sump filters are not interchangeable, and pans differ between applications. Raybestos lists 15 pan bolts and both cork and nitrile pan gasket options for this family.

Step 1: Drop the Pan and Read It

If your pan has no drain plug, loosen the bolts along one side first and let the pan tip so it drains before it comes free. Have a wide drain pan ready. Once the pan is off, inspect before you clean anything. Chrysler's guidance: look for excessive metal on the pan bottom and magnet. A light coating of clutch material on the pan bottom is not a problem unless the truck also has a slipping condition or shift lag. If the fluid and pan are contaminated with a lot of debris, go to diagnosis instead of finishing the service (Chrysler Fluid and Filter Replacement).

Look at the old sump filter too, especially the seam where the metal and plastic halves join. Transmission Digest documented a 2006 Durango with 82,000 miles that came back after a fluid service with inconsistent Park-to-Drive and Park-to-Reverse engagements, a check engine light and P0868. Upshifts, downshifts and lockup were fine, and the scan tool and gauge showed nothing unusual. With the pan off, the sump filter was split at the metal/plastic seam (Transmission Digest, May 2014). A split filter lets the pump pull air and unfiltered fluid, and it will not show up on any data PID.

Do not judge the fluid by color alone. Chrysler says ATF+4 is dyed red for identification, that it darkens toward brown in normal use, and that neither color nor odor can be used to decide fluid condition or the need for a change (Chrysler Automatic Transmission Fluid). What matters is what is in the pan and how the truck drives.

Step 2: Install the Sump Filter the Right Way

This is the step that ruins transmissions. Chrysler puts it in a caution box: the primary oil filter seal must be fully installed flush against the oil pump body. Do not put the seal on the filter neck and try to push the filter and seal in as one assembly, or you will damage the transmission (Chrysler Fluid and Filter Replacement).

In practice: pull the old seal out of the pump bore every time. It likes to stay behind, and if you install a new filter with a new seal over the old one, the filter neck sits wrong and the pump can suck air at the neck. Seat the new seal in the bore by itself, square and flush, then push the filter neck into it. Torque the filter screw to 40 in-lb (Chrysler 545RFE Specifications). That is inch-pounds. It goes into aluminum.

Step 3: Change the Cooler Return Filter, With the Right Part

Chrysler's 2007 spec table lists the cooler return filter at 84 in-lb (Chrysler 545RFE Specifications). Lube the new filter's seal with clean ATF+4 and do not use a filter wrench to tighten it past spec.

Watch the part number. Chrysler bulletin 21-015-05 (September 2005) covers a delayed first engagement into Drive or Reverse after the vehicle sits, typically overnight, that starts after the cooler return filter is replaced. The suspect part is filter 04799662AB, which can let fluid drain back out of the converter while the engine is off. Transmission Digest summarizes the later bulletins, 21-016-05 and 21-007-06: the correct filter is 4799662, and any filter with an AB suffix is suspect and should not be installed (Transmission Digest, May 2014). Current replacements carry an anti-drainback valve, per Raybestos (Raybestos 515489). If an old AB filter is sitting on a shelf in your shop, throw it out.

Step 4: Clean, Seal and Torque the Pan

Clean the magnet and pan, and scrape both sealing rails to bare metal. Old RTV left on the case rail is the usual reason a pan weeps after a service. Use either a quality reusable gasket or a thin, even bead of RTV, not both. Torque the pan bolts to 105 in-lb in a crisscross pattern (Chrysler 545RFE Specifications). Leaning on a ft-lb wrench here is how pan rails get bent and threads get pulled out of the case.

Step 5: Fill With ATF+4 and Set the Level Hot

Use Mopar ATF+4 or a licensed ATF+4 fluid (Chrysler 545RFE Specifications). Chrysler says Dexron II is not recommended, improper fluid can cause clutch chatter, and no additives should be used except leak-detection dye. It also says to avoid "sealers" (Chrysler Automatic Transmission Fluid).

For volume, Ram's published capacities for the 45RFE and 545RFE list a service fill of 5.2 liters (11 pints) for 4x2 and 6.2 liters (13 pints) for 4x4. A dry overhaul takes 14 to 16 liters (29 to 33 pints), depending on the cooler setup (Ram Body Builder 2008 fluid capacities). A pan drop only replaces about a third of the fluid, because the converter and cooler hold the rest. Put in about the service fill, start the engine, then set the final level on the dipstick. Do not trust the number alone.

Chrysler's level check (Chrysler Fluid Level Check):

1. Vehicle on level ground, selector in Park. The converter fills in both Park and Neutral, but Chrysler specifies Park for an accurate reading.
2. Engine idling for at least one minute.
3. At normal operating temperature, about 180°F (82°C), the level is correct in the HOT cross-hatched area. At 70°F it reads about at the upper COLD hole.
4. After adding fluid, wait at least 2 minutes for it to drain down the fill tube before you check again.
5. Read temperature on the scan tool. Chrysler notes that true transmission oil temperature only shows on the scan tool in Reverse or a forward gear, so shift through the gears to get a real reading before you trust it.

Get the level right either way. Chrysler explains that low fluid lets the pump draw in air, so pressures run low and build slowly. Overfilling lets the gear train whip the fluid into foam, which causes the same problems and can push fluid out the vent, where it looks like a leak. Either one can lead to overheating, oxidation and varnish (Chrysler Fluid Level Check). Seat the dipstick fully when you are done.

Step 6: Road Test and Check What Changed

Drive it long enough to get the fluid to temperature, recheck the level, and pay attention to the first engagement the next morning. If it has a delayed engagement after sitting, the filters are the first place to look, not the solenoid pack:

• Confirm the cooler return filter part number and suffix.
• Pull the pan and check the sump filter seam and the neck seal.
• If a sump filter split, Transmission Digest recommends putting gauges on the line pressure sensor tap and the cooler return fitting and making sure pressure drops to zero as soon as the engine stops. Any pressure that stays after shutdown can blow the sump filter, so find the source before you install another one (Transmission Digest, May 2014).

If the truck came in running hot, the service is also a chance to check cooler flow. Sonnax measured about 1.3 GPM of cooler flow at idle with stock programming on an RFE. When desired line pressure at idle was raised by a tune, flow dropped to about 0.5 GPM, and to 0.3 GPM at maximum pressure (Sonnax: RFE Stalling and Overheat Issues). New filters will not fix low cooler flow caused by pressure regulator position or a worn TC limit valve bore. Our 545RFE overheating guide covers that diagnosis.

The Short Version for the Bench

1. Interval: Chrysler Schedule B is sump filter at 60,000 miles and both filters at 120,000. I change both filters every service on anything that tows.
2. Pan: inspect before cleaning. A light film of clutch material is normal; metal or heavy debris means diagnosis.
3. Sump filter: remove the old seal, seat the new seal flush in the pump body first, then the filter. 40 in-lb.
4. Cooler filter: no 04799662AB. 84 in-lb.
5. Pan bolts: 105 in-lb, clean rails, gasket or RTV, not both.
6. Fluid: ATF+4 only, no additives. Service fill about 5.2 L (4x2) or 6.2 L (4x4); set level HOT in Park after one minute at idle.

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Frequently Asked Questions

How often should the 545RFE filter be changed?

Chrysler's Schedule B, which it says covers most vehicles, calls for draining the fluid and replacing the main sump filter at 60,000 miles, and replacing both the sump filter and the spin-on cooler return filter at 120,000 miles. On a truck that tows or runs hot, change both filters every time the pan comes off.

Does the 545RFE have two transmission filters?

Yes. Chrysler added a spin-on cooler return filter to the main sump filter to protect the pump and other components. The sump filter is inside the pan; the cooler return filter catches debris coming back from the cooler. Many quick services only replace the sump filter.

How much fluid does a 545RFE take after a filter change?

Ram lists a service fill of 5.2 liters (11 pints) for 4x2 and 6.2 liters (13 pints) for 4x4, using ATF+4. A dry overhaul takes 14 to 16 liters. Set the final level on the dipstick in Park with the engine idling at about 180 degrees F, not by the number alone.

Why is my 545RFE slow to engage after a filter change?

The usual cause is fluid draining out of the converter overnight. Chrysler bulletin 21-015-05 names cooler return filter 04799662AB as suspect for this, and later bulletins say any AB-suffix filter should not be installed. A sump filter split at its seam or a seal installed on the filter neck instead of the pump bore can cause the same complaint.

What is the torque spec for 545RFE pan bolts?

Chrysler lists 105 in-lb for the oil pan bolts, 40 in-lb for the primary filter screw and 84 in-lb for the cooler return filter. These are inch-pounds going into aluminum, so use an inch-pound wrench.