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Service bulletin T-TT-0334-15

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10111404
Published by NHTSA2017-08-14
Manufacturer's numberT-TT-0334-15
Manufacturer's date2015-04-14
NHTSA componentPOWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); POWER TRAIN

NHTSA's summary

TT: Certain vehicles may exhibit a leak from the input shaft seal on the transfer case assembly. This leak is typically first identified by fluid collecting at the bottom of the seam between the transmission output and transfer case input mating surfaces.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline, Transfer case

Vehicles listed
TOYOTA 4RUNNER2013, 2014, 2015

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
T-TT-0334-152017-08-14. Service bulletin. TT: Certain vehicles may exhibit a leak from the input shaft seal on the transfer case assembly. This leak is typically first identified by fluid collecting at the bottom of the seam between the transmission output and transfer case input mating surfaces.