A750F Overhaul Kit 2003, new and ready to install. Fits the A750F. Ships fast from the USA.
The 2003 model year was the first for the A750F in North America, which means the earliest four-wheel-drive 4Runner, Land Cruiser and Lexus GX470 trucks are now carrying transmission seals more than twenty years old. Rubber that age has hardened whether the truck has 90,000 miles or 250,000, and owners notice it as seepage around the case, a lazy engagement on cold starts, or a slip that slowly creeps in. This A750F overhaul kit for 2003 is the reseal package for that first-year unit. The product photo shows it sealed in a Precision International overhaul kit bag, a brand of soft-parts kits built for transmission rebuilders.
The A750F shares its five-speed gear train and valve body with the two-wheel-drive A750E; what makes it an F is the rear of the case, which mates to a transfer case. Inside, clutch and brake packs are applied by pistons fed with line pressure, and that pressure is contained by lip seals on the pistons, sealing rings on the rotating shafts and gaskets between the pump, case and valve body. When those parts age, apply pressure bleeds away and the packs cannot clamp as hard as they should. An overhaul kit replaces only those sealing parts. It does not contain frictions, steels or a filter, so it is the right buy when the clutch packs measure good and the problem is pressure being lost on the way to them.
Early A750 trucks have a second common source of soft shifts: the valve body. TransGo documents that the unsealed aluminum accumulator pistons in these valve bodies wear their bores and cause flare shifts and burnt frictions, and its A750 shift kit literature ties 2-3 flare and third and fourth gear slip to worn valve bores. Fresh seals will not cure that, so plan to inspect the valve body while the unit is apart; the A750F shift kit for 2003 addresses those circuits. Our walkthrough on Aisin harsh or delayed shifts lays out a road-test and scan routine to tell a pressure leak from a valve or solenoid fault.
This kit is listed for the A750F, 2003. That year the transmission appeared in the four-wheel-drive 4Runner, the Land Cruiser, the Lexus GX470 and the Lexus LX470. Because the A750 family received running changes in later years, a 2003 kit is the safer match for a first-year case; compare the new gaskets to the ones you remove, and send us your year and VIN if you want us to check the match before shipping. Other years and the two-wheel-drive versions are on our Aisin transmission page.
Finish by clearing the transmission's learned values so the computer re-adapts shift timing to the sealed-up unit.
| Fits | A750F 2003 |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | OEM |
| Reference | A750E |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
In 2003 the A750F went into the four-wheel-drive 4Runner, the Land Cruiser, the Lexus GX470 and the Lexus LX470. Confirm the transmission code on the case or send us your VIN if you are unsure.
No. It is an overhaul kit, meaning gaskets, seals, sealing rings and O-rings. Friction plates, steels and a filter are not included.
Only if pressure is leaking past seals. Worn valve body bores and accumulator pistons are a common cause of 2-3 flare on early A750 units, so inspect the valve body during the rebuild.
The internal sealing parts are common, but the A750F rear case seals to a transfer case and the A750E uses a tailhousing, so buy the kit that matches your transmission.
Toyota WS fluid. Refill and set the level with the engine running at the specified fluid temperature, using the check plug procedure for your vehicle.
