Chrysler Dodge A500 40RH & 42RH Automatic Transmission Overhaul Kits & Parts


Having automatic transmission problems with your A500. Considering overhauling your 518_large.jpgDodge Chrysler A500 40RE/42RE transmission? We provide a large inventory selection for Dodge Chrysler A500 40RE/42RE automatic transmission overhaul kits, parts including steels, kits, solenoids, filters, solenoids. This wide selection of parts are used in the Dodge Chrysler A500 40RE/42RE automatic transmission in Dodge Chrysler Ram 50, Chrysler trucks starting in 1988 with 3.9 lt engines, Dodge Durango's starting in 1998 with either 3.9 or 5.2 lt engines also used in Chrysler Vans starting in 1988. In addition to these kits we also supply torque converters, fluids, problem prevention kits and in most cases we can supply good take out hard parts and save you some money.


Free information is provided on parts illustrations, maintenance tips, overhaul tips and assistance in identifying just what automatic transmission you have in your vehicle. In addition a factory description and ratio information is available.

Parts Illustration

Troubleshooting/Overhaul Manual
Maintenance Tips

Overhaul Tips
Remanufactured Chrysler Dodge Automatic Transmissions
What domestic transmission do I have?



4 speed rear wheel drive automatic overdrive transmission. Unit identification:

  • Hydraulic (RH) units utilize a 2 or 3 pin case connector.
  • Electronic (RE) units utilize an 8-pin case connector.

Hydraulic (RH) 1988 - 1996.

Electronic (RE) 1993-ON

Fluid Recommendation
This is an abbreviated list and other parts are available. If you need something that is not listed just let us know.

Part Number

Qty Req




TMA500   Technical Manual 1988-96


TMA500SE   Technical Manual (42RE Jeep) 1993-On




Master Rebuilder Kit w/o steels 42RH 1988-96




Master Rebuilder Kit w/o steels 42RH and 44RE with Dacron Filter 1993-99




Master Rebuilder Kit w/o steels 42RH and 44RE with Plastic Filter 1997-On




Clutch Steels Plate Kit 42RH 1988-96




Clutch Steels Plate Kit 42RE and 44RE 1993-On




Low & Reverse Band 1988-On




Bushing Kit (except 1993 42RE w 3.9L) 1988-93




Bushing Kit (also 1993 42RE w 3.9L ) 1994-On




Overdrive Piston to Overdrive Direct Hub Bearing 1988-On




Overdrive Sun Gear Thrust Plate and Bearing Kit (updated) 1988-On




Direct Roller Can to Output Shaft Bearing 1988-On




Overrun Clutch Roller Assembly (before 11/16/87) 1988




Overrun Clutch Roller Assembly (from 11/16/87) 1988-On




Overdrive Clutch Roller Assembly 1988-On




External Cooler Auxiliary        
LPD4589   Long "True Cool" Lower pressure Drop Cooler 8" x 11" x 1.5" Complete kit. Remove the heat extend the transmissions life.  



The following components are available to enhance Shifting  

Part Number

Qty Req






Shift Calibration kit 1988-On



The following electronic components may or may not be required.

Part Number

Qty Req






3-4 Shift Solenoid 2 pin Case Connector 1988-96




Dual Pack Solenoid 3 pin Case Connector 1988-96




Dual Pack Solenoid and Trans. pressure Sensor Kit 1993-On




Governor Pressure Solenoid 2Prong Connector 1993-On




Trans. Pressure Sensor 4 Prong Connector 1996-On




Natural Safety Switch (w/seal) 3 prong Round Connector 1988-99




Natural Safety Switch (w/seal) 3 prong Rectangular Connector 1999-On



Torque Converter ---------- Torque Converter Problem & Information

For this series transmission there are MANY different possible torque converters (not all listed here). When rebuilding your transmission it is always recommended that you change the torque converter. The small metal and other debris you found in the pan will also be in the old converter. When ordering the torque converter you must supply the four digit code off of the existing unit (located on a sticker). Some of the probabilities are:

torqueconverter_large.jpg Torque Converter Installation/Preparation

Code Order Part Number   Application Price
877 NAP877   Jeep 1993, 11.25" 4.0L non-lockup


703 NAP703   Jeep1 1994-Up 4.0L Grand Cherokee, Comanche no-ring gear 11.25" lockup


783 NAP783   Jeep 1994-Up 4.0L Grand Cherokee 90 degree, bolt pattern: no ring gear 11.25" lockup


871 NAP871   Jeep 1993; 3.9L with ring gear 11.25" lockup


Be sure to use our transmission cooling line flush kit in order to remove debris from radiator transmission cooler reservoir. Your cost is $11.88 order Kooler Kleen.
Blue Decal NAP290   1990-91; 3.9L High Stall 11.25" lockup


White Decal NAP488   1990-91; 5.2L Low Stall 11.25" lockup


627 NAP627   1992; 3.9L High Stall 11.25" lockup


324, 871, 899 NAP871   1992-93 3.9L High Stall 11.25" lockup


853 NAP853   1994-95; 3.9L High Stall 11.25" lockup


549, 593, 594, 781, NAP781   1996-up; 3.9L, Durango (98-up) 5.2LL Dakota, 5.2L Truck 90 deg bolt pattern. Narrow ring gear 11.25" lockup


792, 599, NAP792   1996-up; 5.2L 90 deg bolt pattern, wide ring gear 11.0" lockup



We supply only high quality remanufactured torque converters, cost + $50.00 core deposit (some may be higher).
Troubleshooting/Overhaul Manual

These manuals are typically 50 to 85 pages and contain both troubleshooting information and data to support overhaul, such as electronic data, illustrations and specific procedures and specifications. These are professional shop manuals which will give you the capability to diagnose problems, and evaluate repair options. If you decide to have your transmission overhauled at a local shop you will be armed with detailed knowledge of problems and potential fixes. This information should allow you to get the best deal, Always compare pricing for labor. If you supply the parts and ask for warranty in the end you will save money.

Fluid Recommendation:
Red Line high-Temp ATF

Our Red Line high-Temp ATF --is a synthetic GL-4 gear oil for use where Dexron III is recommended. A higher viscosity allows optimal operation at 70 degrees higher temperature, providing better torque converter efficiency. Perfect for heavily-loaded vehicles. Superior stability allows high-temperature operation without varnishing valves and clutches.

Recommended for use after overhaul, mixing with existing fluid is not recommended!

Our LubeGard "automatic transmission protectant " is recommended as an additive to improve transmission life and maintenance.

Red Line high-Temp ATF your cost $11.95 qt.


Master Rebuild Kit

Typically contains gaskets and rubber kit, sealing rings, metal/rubber clad seals, friction plates, steel plates* , front and rear bushings, filter and where applicable Band* and/or Modulator*.


*not included if listed separately


Maintenance Tips


Regular maintenance cycles and continued checking of fluid levels is critical to the life of your transmission. Operating temperature is the single most critical parameter effecting the life of the transmission. Keep the temperature down and fluid fresh helps the units typically last a very long time under normal driving conditions. We can supply a couple of aftermarket products to help you get the most out of your transmission:


Auxiliary Transmission Oil Cooler.


The Truco part number LPD4589 is an excellent auxiliary oil cooler to provide additional cooling capacity. The kit includes all parts required to mount the unit and connect to existing cooling lines. This is a typical do it yourself project. The unit typically mounts in front of the radiator. Your cost on this transmission life saving product is $108.74 plus shipping and handling.


Fluid Additive


Generally we don't recommend additives but we have found that the Lubegard "Automatic Transmission Protectant" at only $13.93 + S&H can:

  • Prevent overheating, reducing transmission temperature up to 40 degrees F.
  • Extend fluid life
  • Eliminates transmission fluid foaming and oxidation
  • Reduces wear throughout the transmission
  • Remove clutch chatter and torque converter shudder
  • Softens and modifies harsh shifts
  • Provides for smoother shifting
  • Eliminates objectionable noises during shifts
  • Keeps valves and governors free and frees stuck valves in valve bodies
  • Raises the thermal and oxidative stability
  • Only product that increases the fluids ability to transfer heat
  • Contains no Ash

Always consult and follow owners manual for maintenance intervals and requirements.


Consult and follow owners manual for maintenance intervals and requirements.

Overhaul Tips


Before you tear into the transmission, we suggest you first study the troubleshooting/overhaul manual, add a bottle of our "Automatic Transmission Protectant" and put a few miles on the vehicle. This just might free valves and governors that are possible stuck in valve bodies. Be sure to get computer trouble code(s), see owners manual for technique to acquire malfunction codes. This will be a great assistance in diagnosing possible problems.


Twenty-One Steps to Successful Transmission Repair:


1) Do your research locate any technical bulletins pertaining to your transmission, ask your dealers parts department for bulletins.


2) Clean the entire transmission, including the valve body.


3) Check pump, valve body and case for warpage.


4) Flat file pumps, valve bodies, and cases. Just a few strokes with the file to knock off high spots and handling burrs.


5) Check all pump gear clearances.


6) Check planet pinion end play and side to side motion.


7) Soak all planet assemblies.


8) Soak all friction materials for 15 - 30 minutes.


9) Make sure all steels are in usable condition or replace. Do not sand or tumble steels when used against High Energy friction materials.


10) Inspect all surfaces upon which a band will ride.


11) Replace all rotating oil control rings.


12) Check all oil control rings and rubber products in the bores for proper fit.


13) Check all major support bushings and bushings that control lube oil.


14) Pre-lubricate all bushings and thrust washers.


15) Pre-lube pumps.


16) Pre-fill torque converter.


17) Use available manuals to ensure proper specifications and clearances.


18) Set correct clutch and band clearances.


19) Take the time to set the total end play.


20) Use a torque wrench on all pumps and valve bodies.


21) Always double flush the cooling and cooling return lines to the radiator to remove particles trapped there.


Take your time, take your time, take you time!


Torque Converter Information


Failure modes for torque converters manifest themselves in different ways, slow failure, i.e. loss of power over time, instant failure, i.e. input shaft spline failure. Following is a short list of problems, possible causes:



Possible Cause


Overheated Converter TCC/PWM Solenoid filled with debris ATSG Bulletin #98-25
Overheated Converter Replace worn TCC Regulator Valve Transgo #SK4L60E or Sonnax #77754-03k (92-97), 77754-04k (98-up) these require reamer #77754-R2
LOCKUP Slipping (CODE P1870) Worn valve body casting ATSG Bulletin #00-41
TCC Slipping (1994-1995) PCM Software ATRA Bulletin #473

The difference between stator design, look inside the converter at the larges set of spline's (stator shaft spline's). If the spline's are split then the unit has a dual element stator. Do not interchange single element and dual element converters.


Torque Converter Installation/Preparation


Many torque converter problems can be avoided with proper preparation:


1) Pre-thread converter bolts by hand to make sure there is no sign of stripped threads.


2) Check and clean crankshaft thoroughly. Change crank spacer (if applicable).


3) Use 320 grit sandpaper or Emory cloth to remove any metal shavings on crankshaft.


4) Check converter for any damage that may have occurred during shipping.


5) Pre-fill converter with a minimum of (1) quart of transmission fluid.


6) Clean all paint off the pilot using 320 grit emory cloth.


7) Apply grease, not transmission gel, on the pilot.


8) Check flexplate for cracks and be sure there is no more than .006" run out.


9) Make sure all engine dowel pins are in place and clean.


10) Make sure all electrical ground straps are properly connected.


11) Never, Never use an impact gun to install torque converter bolts. Driving a bolt into the converter cover will create a dimple on the lockup apply surface. Lockup clutch failure will occur when the lockup piston applies against and uneven surface. Grinding off on thread length from all lockup converter bolts is recommended to avert this type of failure.

Parts Illustration: a500partill_th_large.jpg






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In addition to Doge and Chrysler automatic overhaul kits and repair parts we offer free technical support to assist you in solving your automotive problems.