A760E Master Rebuild Kit 2005

The first A760E six-speeds came off the line in 2004 and 2005, which puts the earliest Lexus GS and IS sedans and the Toyota Crown that carry them well past the age where clutch wear catches up. If one of those cars now revs between gears, slips in the top two ratios on a long grade, or keeps storing shift solenoid codes after the solenoids have already been replaced, this master rebuild kit for the 2005 A760E gives a rebuilder the frictions, steels, seals and gaskets to renew the whole unit in one job.

What a master rebuild kit does in a 2005 A760E

Aisin built the A760E as a six-speed version of its A750 rear-drive automatic. The first five ratios carry over, and a 0.586 sixth gear is added for low-rpm cruising. Every one of those gears is produced by applying a specific combination of clutches and brakes, and the transmission computer controls those apply pressures with solenoids while it watches input and output shaft speed. The computer has no way to make a worn clutch hold; it can only raise pressure and log a fault when the ratio drifts. A master kit attacks the actual wear: new lined frictions and steels for each pack, plus the piston seals, sealing rings, O-rings and gaskets that keep apply oil where it belongs. The listing also cross-references the A761E, the V8 member of the same family, so confirm which code your unit carries before you order.

Symptoms that call for a full rebuild

• Engine speed climbs without the car accelerating, worst in fifth and sixth under load
• Flare or a slip-then-bump feel on the middle upshifts
• Delayed or harsh engagement when shifting into Drive or Reverse
• Solenoid performance codes P0751, P0756, P0761 or P0766 that return after new solenoids
• Dark, burnt fluid with clutch material in the pan or on the magnets
• External leaks from several seals at once on a high-mileage unit

How to confirm the clutches are the problem

Those P0751-P0766 codes are the trap on this family. Sonnax explains that they set when the commanded gear ratio does not show up, which a slipping clutch causes just as easily as a stuck solenoid. Before buying parts, watch commanded gear against the actual input and output speeds on a scan tool; our guide to reading transmission live data shows how. Then pull the pan and look at the fluid and debris. Our Aisin slipping under load guide covers the line pressure and valve body checks that separate a hydraulic fault from burned frictions, and the flare versus slip article helps you describe what the car is actually doing.

Fitment

This kit is listed for the A760E in 2005 production. Aisin's own applications run by calendar year, so a car built in 2005 may be sold as a 2006 model. Rear-drive Lexus GS and IS sedans and the Toyota Crown used the A760E in that window, but the IS250, GS300 and other models also appeared with the A960E or the all-wheel-drive A760H, which take different parts. Read the transmission code on the ID plate before ordering, compare the friction count and tooth pattern against the plates you remove, or send us the year and VIN and we will check it. Later builds have their own listing, the A760E master rebuild kit for 2006-2009, and the full range for this family is on our Aisin transmission parts page.

Install notes

• Before reassembly, inspect each drum, the pump, bushings and thrust washers. A kit restores soft parts only; scored drums or a worn pump still have to be replaced.
• Soak the new frictions in Toyota WS fluid, then set each pack's clearance to the factory specification.
• Air-check every clutch and brake circuit before the valve body goes on, and prime the pump at startup.
• Worn valve body bores and accumulator pistons burn new clutches quickly. TransGo documents accumulator bore wear causing flare shifts and burnt frictions in this family, so many builders add an A760E shift kit at the same time.
• If the original solenoids are sticky or high-mileage, replace them with a 9-piece A760E solenoid set while the valve body is out.
• Refill with Toyota WS, check the level by the factory overflow procedure at the specified fluid temperature, and clear the learned shift values so the computer starts fresh.

Does this kit fit a 2006 model year Lexus?

Possibly. Aisin lists A760E use by calendar year, so a car built in 2005 may carry a 2006 model year. Check the transmission code on the ID plate or send us your VIN to confirm.

My IS250 or GS300 shows an A960E. Will this work?

No. The A960E is a different six-speed and takes its own rebuild parts. This kit is for the A760E.

Will new solenoids fix P0751 or P0756 codes?

Only if a solenoid is actually at fault. Those codes also set when a clutch slips and the commanded ratio does not appear, so verify with live data before replacing solenoids.

What fluid goes back in after the rebuild?

Toyota WS (World Standard) ATF. Soak the new frictions in it before assembly and set the level using the factory overflow check with the fluid at the specified temperature.

What should I buy with the master kit?

Plan on a filter, any worn drums or bushings found during inspection, a shift kit or accumulator repair for worn valve body bores, and new solenoids if the originals are suspect.

• Aisin Slipping Under Load: Root Causes and Fixes
• How to Read Transmission Live Data With a Scan Tool
• Shift Flare vs. Slip: How to Tell Them Apart
• Adaptive Relearn After a Valve Body Swap or Rebuild