Toyota U151 5-Speed FWD Automatic · Toyota/Lexus · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
2002–2013 Lexus RX330/RX350 (AWD and FWD); 2002–2013 Toyota Highlander (V6); U151E (FWD), U151F (AWD); 5-speed crossover transaxle
| Configuration | 5-speed FWD/AWD electronic automatic transaxle |
|---|---|
| Gear Ratios | 1st 3.30:1 · 2nd 1.90:1 · 3rd 1.42:1 · 4th 1.00:1 · 5th 0.71:1 · Rev 2.65:1 |
| Fluid Type | Toyota WS ATF |
| Fluid Capacity | 9.0 qts total, 5.0 qts service refill |
TCC shudder from WS fluid degradation is the most reported U151 complaint — Lexus RX owners notice it early.
Symptoms: Shudder at 40–55 mph; clears under hard acceleration
Solenoid failure at 100k+ miles causing stuck-in-gear.
Symptoms: Stuck in 2nd or 3rd; OD light flashing; P codes
The AWD rear differential coupling develops seal leaks on the U151F.
Symptoms: Fluid leak at rear coupling; AWD engagement issues
TCC inspected and replaced. Solenoids replaced. AWD seals replaced if applicable. All clutch packs replaced. Valve body rebuilt. Full WS soft parts kit.
Toyota WS every 40,000 miles. RX350 TCC shudder often resolves with fresh WS fluid — always try this first.
Usually TCC shudder from degraded WS fluid. Try a WS flush first — resolves most RX350 shudder complaints. If shudder is specifically during turns or at very low speed, it may be the AWD rear coupling.
Toyota WS ATF.
2–3 days.
$1,700–2,400.
Yes — same U151F transaxle, same fluid requirements, same failure modes.
Free diagnostic, written estimate, lifetime warranty. Chicago's U151E/F rebuild specialists since 1987.
