U540E Transmission parts, repair guidelines, problems, manuals
A4LB1, A4Q, A4P, A4L, A4G, A4R, A4B, A4J
Transmission general data
| Number of gears | Transmission Type | Drive | ATF (full capacity) L | ATF (change) L | ATF type |
|---|---|---|---|---|---|
| 4 | AT | FWD | 6,2 | 4 | Toyota Type T-IV |
The 4-speed FWD automatic transmission U540E was designed by Aisin in 2000 on the basis of the famous A4LB-1, which went out of fashion by that time. The transmission A4LB-1 also was modified in 2002 and a new modification can be found on different cars worldwide.
This automatic transmission has two names - U540E (according to Aisin Co), and Daihatsu gave different names to its sub-modifications: A4Q, A4P, A4L, A4G, ..., depending on the car model. The U540E was upgraded with several hydraulic control solenoids, the valve body and electrics, and the new filter for the valve body.
What are you looking for?
Overhaul Kit | Friction Kit | Friction | Steel Plate | Steel Kit | Band | Solenoid Kit | Solenoid EPC | Solenoid TCC | Pump | Shaft | Drum | Valve body | Torque converter | Hub | Piston | Piston Kit | Planetary Gear | Filter | Gasket | Bushing | Seal | Bearing | Pressure Plate | Stator | Differential | Retainer | Inhibitor Switch | Instruction manual | TOOLS & ACCESORIES | Sensor
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- Cover Bolt, Cover Bolts, Mounting Bolt, Mounting Bolts, Pan Bolt, Pan Bolts, stud, studs, Split Pin
- Filters, Filter Cartridges, Filter Cartridge, Oil Pan Filter, Inlet, Filter Kit
- Friction Discs, Frictions, fric, Friction Disc, Friction, Friction Plate, Friction Ring, fric., Clutch Plate, Friction Lining
- Gasket Pan, Pan Gaskets, Pan gasket, Filter Gasket,Filter Gaskets
- ohk, OHK kit, Overhauls, mok, Overhaul kit, Masterkit, Master kit, Master Overhaul, Repair package, Overhaul, Rebuild kit, Master Rebuild, Super Rebuild Bundle, Banner Kit, SUPER KIT, SUPERIOR KIT
- Pans, Crankcase, Oil Pan
- Pistons, Apply Piston, Pack Piston, High Piston, Damper Piston, Piston Damper, Piston Plate, Interm. Servo Pist, Piston Seals, Piston Seal Ring, Piston Seal Rings, Piston Seal, Piston Cover, Piston Covers, Rear Servo, servo piston, Piston Retainer, Piston Retainers, Servo kit, Super Servo, servo, Shift Pison
- Piston Kits, Piston Complete, Piston part, Piston Sets, Piston Set
- Seals, Metal clad seal, Lip Seals, Connector Hole Seal, Lip Seal, Main Seal, Radial Lip Seal, Main Seal, Manual Seal, Oil Feed Seal, Side Cover Seal, Seal Cooler, Seal Oil Cooler, Case Seal
- Steel Kits, Steel Set Kit, Steel Clutch Plate Kit, Steel kit, clutch steel, clutch steels, Steel set, steel pack, module kit, Steel Plate Clutch Kit, Steel Plate Kit, Steel Plate Module, Steel Plate Set, Steel Module
- Steel Plates, steel, Steels, steel disk
Technical issues and repair guidelines
This transmission is very reliable as the most of Aisin transmissions. For many years of operation, it only requires change of oil and filter replacement, however it can cover the distance of 150-200 thousand kilometers even with an old filter. For the overhaul of this carefully adjusted transmission, specialists usually order the repair kit of gaskets and seals, which is mainly needed for reassembly of contaminated valve body and replacement of worn out rings causing the burning of frictions.
The kit of all friction clutches is usually ordered together with the repair kit. Frictions get burnt for various reasons, but one of the most popular ones is related to insufficient oil pressure, caused by:
1. worn-out teflon and rubber rings
2. dirty wedging valves of the valve body
3. dirty valves of solenoids
4. faulty electrics of the solenoid or wiring of solenoids
5. clogged filter
This transmission can be rarely met in repair services, all spare parts for this transmission are considered to be rarity and there is no much statistics related to its repair.
Instruction manuals and useful links Suggest your link
| Link type | Source | Description |
|---|---|---|
| alltranz.co | Scheme U540E |