A340E Shift Kit 1985, new and ready to install. Fits the A340E. Ships fast from the USA.
Toyota 4Runner, Pickup, Tacoma, T100, Tundra, Supra, Cressida and Lexus SC owners with the A340E or four-wheel-drive A340F usually come looking for this kit for one of three reasons: shifts have gone long and mushy with mileage, a truck that tows or wheels keeps burning clutches, or the converter lockup has started to slip and heat the fluid. This is the TransGo 340-HD2 Reprogramming Kit with Gear Command, listed here for A340E units from 1985 on. It is new, made in the USA, backed by a 1-year warranty and ships from the USA.
On the A340E the ECU decides when to shift and when to lock the converter by switching solenoids, but how firmly each clutch and brake applies is still hydraulic. Toyota's manual explains that throttle pressure follows the throttle opening and acts on the primary regulator valve, so line pressure rises and falls with throttle, and accumulators then cushion each apply. As the valve bores and clutches wear, that pressure drifts and shifts stretch out. The 340-HD2 kit raises and steadies the pressure with new primary regulator springs and a washer plus red, blue and white cut back valve springs, firms the accumulators with new springs and spacers, and lets you enlarge selected separator plate feed holes with the drill bits supplied. It also brings a hardened steel lock-up relay boost valve and bushing, because the aluminum original wears and lets converter apply pressure leak, plus an optional hardened 1-2 shift valve that holds first gear in manual low.
Electrical faults are a different job. A failed shift or lockup solenoid sets its own code and usually causes a wrong gear or no lockup at all, not a soft shift; check those with our solenoid multimeter test first.
Toyota's factory manual uses a hydraulic test with the fluid at 50-80 C (122-176 F): read line pressure in D and R at idle and again at stall. If every reading is low, it lists the throttle cable adjustment, throttle valve, regulator valve, oil pump and overdrive direct clutch as suspects; low in D only points at the forward clutch, low in R only at the direct clutch or first and reverse brake. A kit helps the first group, not worn clutches. See our pressure testing guide for the gauge setup.
TransGo lists 340-HD2 for 1985-on A340, A341, A343 and AW4 transmissions, which takes in the A340E, A340F and A340H. Its older printed instructions say 1987-2007, so if you have a 1985 or 1986 unit, send us your year, model and VIN before ordering and we will confirm. The instructions cover four different valve body designs, and TransGo notes the lock-up relay boost valve fits type two, three and four valve bodies except some Lexus models. Browse matching parts in our Aisin collection.
| Fits | A340E 1985 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Reference | A340F |
| Ships | From the USA |
| Warranty | 1-year |
The 1996-2002 4Runner uses the A340E (2WD) or A340F (4WD), and TransGo lists the 340-HD2 for both. Send us your VIN if you want the transmission code confirmed.
TransGo's product page says 1985-on, but its printed instructions say 1987-2007. Send us your year, model and VIN before ordering an early unit so we can confirm.
No. Everything is done through the pan opening with the valve body on the bench, and the transmission stays in the vehicle.
If they are original and the truck has high mileage, it is cheap insurance while the valve body is out. A shift or lockup solenoid fault will not be cured by the kit alone.
Use the fluid your owner's manual specifies, typically Toyota Type T-IV on later trucks or Dexron on early ones, and check the level hot.
The kit covers A340-family units in Lexus vehicles, but TransGo notes its lock-up relay boost valve does not fit some Lexus valve bodies. Identify your valve body type before installing that part.
