One problem related to transmission failure has been reported for the 2004 Toyota 4Runner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota 4Runner based on all problems reported for the 2004 4Runner.
Transmission failed due to rusted transmission lines. Leads up to finding out that frame is completely rusted out. Unable to fix it due to frame rust. Suspension are of frame rusted as well. . . Barely holding on. Traveling from TN to PA when all this happened.