62TE Transmission Cooler 1989, new and ready to install. Fits the 62TE. Ships fast from the USA.
A Chrysler minivan, Journey or sedan that runs hot, shudders on converter lockup or throws erratic codes after a long drive does not always have a bad cooler or a worn converter. On the Chrysler front-wheel-drive automatics the small cooler bypass valve can stick open and send fluid around the cooler instead of through it. This listing is that valve: a new, genuine Mopar cooler bypass valve, part number 4659946AB (OE reference 4412229AB), listed for the A604/41TE family going back to 1989 plus the A606/42LE, 42RLE and 62TE.
Fluid leaving the torque converter heads out to the cooler and comes back to feed the lube circuit. The bypass valve sits in that path as a safety. Sonnax describes its intent this way: re-route ATF from the cooler line to lube only if the cooler is blocked, so a plugged cooler cannot starve the gears and bushings of oil. In normal running it should stay closed and every drop should go through the cooler.
The trouble is that the valve wears and collects debris, and it tends to stick open. Sonnax notes two results: much of the ATF never passes through the cooler, so the transmission overheats, and fluid pressure is bled out of the system, which can leave converter apply pressure too low and let the converter clutch slip.
On the 62TE, overheating also speeds up the clutch and solenoid problems the unit is known for, including the underdrive clutch wear and harsh 2-3 and 3-4 shifts. Heat is the common thread, so restoring full cooler flow protects everything else.
Start with a flow check: disconnect the cooler return line, run the engine in park and measure what comes out over a set time. Weak flow with a cooler that blows clear points at the bypass valve or pump. Watch fluid temperature on a scan tool during a road test, and check the fluid itself for a burned smell. Our 62TE common problems guide covers the heat-related failures, and the Grand Caravan 62TE problems guide explains what to check on the minivans.
The listing calls this valve out for the A604 (41TE), A606 (42LE), 42LE, 42RLE and 62TE, 1989 and up, in Dodge, Chrysler, Ram and VW Routan vehicles. The 1989 date is when the A604 arrived; it is not a 62TE model year. Where the valve lives varies: on the 41TE family it fits in the case under the pump, while TransGo's literature places the 62TE bypass in a separate bypass block. Sonnax also notes some 1997-and-later 41TE units were built with no bypass valve in the case at all. Compare your old valve to the photo and match part number 4659946AB, or send us your year and VIN. See all parts for this unit on the 62TE collection page.
| Fits | 62TE 1989 |
| Part type | Transmission Cooler |
| Condition | New |
| Brand | OEM |
| Reference | A604 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is the cooler bypass valve that controls whether fluid flows through the cooler or around it. If it sticks open the transmission runs hot even with a good cooler.
The listing includes the 62TE, but the 62TE uses a bypass block rather than the 41TE's in-case location. Match part number 4659946AB to your old valve, or send us your year and VIN.
That is when the A604 (41TE) came out. The valve is listed for that family from 1989 on and for the later 42LE, 42RLE and 62TE.
Yes. Sonnax notes a stuck-open bypass relieves fluid pressure and can reduce converter apply pressure, causing TCC slip and shudder.
ATF+4 only. Chrysler's owner information warns against other fluids, flushing chemicals and additives.
