A518 valve body for 1990-1995, Sonnax-updated, dyno-tested and ready to install. Ships fast from the USA.
If the tag on your 1990-1995 Dodge transmission reads A518 rather than 46RH, you have the same hydraulically governed four-speed overdrive automatic under an older Chrysler case code - Chrysler used A518 before standardizing on the numeric 46RH designation, and the two names describe one transmission. This listing is a valve body built for that 1990-1995, 2-solenoid unit, rebuilt with Sonnax's corrections for its known wear points and run on a dyno before it ships so shift feel and apply pressure are verified, not assumed.
The A518 generates governor pressure mechanically, with a flyweight governor driven off the output shaft, rather than through a computer-controlled solenoid - that is what separates it and its 46RH twin from the later electronically governed 46RE. The valve body carries just two solenoids, one for the overdrive clutch and one for the torque converter lockup clutch, each fired by a pressure switch rather than a governor solenoid circuit. Those two solenoids plus the mechanical governor signal are what the spool valves use to time overdrive engagement and lockup apply, so when the bores wear from pressure cycling, the result shows up as a shift or lockup complaint rather than an electronic code.
Because there is no governor pressure solenoid to set a code on this unit, run the complaint down hydraulically rather than with a scan tool first. Our 46RE/46RH common problems and fixes guide lays out the elimination order across cooler flow, pump condition and the valve body, and those same mainline and converter circuit wear points apply directly to the A518's hydraulic valve body.
This valve body fits the 1990-1995 A518 - the 2-solenoid, mechanically governed generation also sold under the 46RH case code during the same years, so this listing and our 46RH valve body are the identical part. Confirm your casting and separator plate match the listing photos, or send your year and VIN and we will verify fitment. If your truck is a 1996-or-newer model with a governor pressure solenoid and sensor, it has moved to the electronically governed 46RE and needs a different valve body, such as our 1996-1999 46RE valve body; the full lineup is on the 46RE/46RH/A518 parts collection page.
Drop the pan and change the filter in the same job so debris from the old valve body does not carry into the new one, torque the bolts in Chrysler's sequence rather than corner to corner, and refill with ATF+4. There is no computer relearn to run on this mechanically governed unit, but check that the overdrive and lockup pressure switches operate cleanly after the swap, since a sticking switch produces the same symptoms as a valve body fault. If the clutch module or governor components are original to a 1990-1992 truck, replacing a worn clutch module or sprag clutch at the same time prevents a comeback.
| Transmission | A518 |
| Year Range | 1990-1995 |
| Condition | Remanufactured / updated |
| Testing | Dyno-tested |
| Shipping | Ships from the USA |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. A518 is Chrysler's older case code for this 1990-1995 hydraulically governed four-speed overdrive automatic; 46RH is the later numeric name for the identical unit.
The A518 carries two solenoids - one for the overdrive clutch and one for the torque converter lockup clutch. There is no governor pressure solenoid, because governor pressure is generated mechanically.
The 46RE replaced the A518/46RH's mechanical flyweight governor with a computer-controlled governor pressure solenoid and sensor. The valve bodies are built differently and are not interchangeable.
No. 1996-and-newer trucks in this family use the electronically governed 46RE and need its own valve body.
ATF+4.
The valve body is run on a test stand after assembly so shift feel and apply pressure are verified before it ships, instead of assumed from a visual rebuild.
