Complete front oil pump for the Aisin A340E four-speed and its A341E, A343F, A350E and AW30-40LE cousins, OE 3530130040 and 3530135010.
A Toyota 4Runner, Tacoma, T100, Tundra or Supra, or a rear-drive Lexus, with the Aisin A340-series four-speed that engages slowly when hot, slips under load or whines with engine speed often has a worn front pump behind the complaint. This is the complete front oil pump assembly for that family: pump body, cover, stator shaft, gears and front seal, ready to bolt in. It cross-references OE numbers 3530130040, 3530135010 and 3537030031.
The A340E is a rear-wheel-drive four-speed built from a three-speed planetary section with an overdrive planetary in front of it. The torque converter hub drives the pump gears, and the pump supplies everything downstream: line pressure for the clutches and brakes, converter and lock-up feed, and the cooler and lube circuit. On earlier units line pressure is also shaped by the TV cable; GEARS magazine notes Toyota replaced the cable with an electronic SLT solenoid for the 2000 model year. Either way, the valve body can only regulate the oil the pump delivers.
GearBoxList points out that the A340E lives a long time on clean fluid, but dirty fluid wears the bushings and costs oil pressure, after which the forward clutch burns first, then the second brake, then Low/Reverse. A pump body or cover that has been scored by that debris cannot be fixed with a seal kit.
Start with the fluid level and condition, then a line pressure test at the test port, idle and stall, in Drive and Reverse. Low pressure in both ranges with a correctly adjusted TV cable (or a good SLT solenoid on later units) points at the pump or the pressure regulator. Our guide on Aisin slipping under load walks through it, and converter hub and pump bushing wear explains why a worn hub and a worn pump usually travel together.
The listing covers the A340E, A340H, A340F, A341E, A343F, A350E and A650E, plus the AW30-40LE, AW30-43LE and AW30-80LE versions used outside Toyota. That is a long list of related cases, and Aisin changed pump details over the years, so do not order on the transmission name alone. Read the code on the case tag or VIN, match your old pump part number to 3530130040, 3530135010 or 3537030031, or send us your year and VIN. The rest of our A340 parts are in the Aisin transmission collection.
A pump is usually changed during a full overhaul; the A340E/A340F/A343F master rebuild kit covers the clutches and seals. If shift timing was also off, the A340E shift and lock-up solenoid kit is worth fitting while the pan is down.
| Transmission | Aisin A340E (RWD 4-speed) |
| Also listed for | A340H, A340F, A341E, A343F, A350E, A650E, AW30-40LE, AW30-43LE, AW30-80LE |
| OE reference | 3530130040, 3530135010, 3537030031 |
| Type | Complete front oil pump assembly with stator shaft |
| Item weight | 12.21 lb |
| Package dimensions | 13.19 x 11.81 x 6.69 in |
It is listed for the A340E, A340H, A340F, A341E, A343F, A350E and A650E and the AW30-40LE, AW30-43LE and AW30-80LE, cross-referencing OE 3530130040, 3530135010 and 3537030031. Match your old pump number or send us your year and VIN before ordering.
It is a complete front pump assembly: body, cover, stator shaft, gears and front seal, ready to install.
Slow engagement into Drive or Reverse when hot, slipping in more than one gear, a whine that follows engine RPM, and forward clutches burning soon after a rebuild. A line pressure test confirms it.
Toyota Type T-IV ATF. GearBoxList lists 8.3 liters total capacity. Check the level hot after the install.
Only if the pump body, cover and gears are not scored. Once debris has scored the gear pocket or cover face, the pump has to be replaced to get line pressure back.
Flush or replace the cooler and lines, inspect the converter hub, and if the clutches are burnt, overhaul the unit with a master rebuild kit.
