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Vehicle recall 10V168000 · April 23, 2010

Trans Tech DW4+9139, DW5+9159FRL and 11 more models

The HVAC control knobs may fracture and spin on the control shaft causing the operator to be unable to control the defrost system.

Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.

Summary
Transportation collaborative Inc. (tci) is recalling certain model year 2009 and 2010 school buses models sst 30 pak, STH4+9, STH4, STH5RL, ST5, ST4, DW4+9139, DW5193FRL, DW5139, DW5+9195, DW5+9159FRL, DW6159FRL, and DW6159 manufactured on Chevrolet express and GMC savana chassis from February 2009 through April 15, 2010. The HVAC control knobs may fracture and spin on the control shaft causing the operator to be unable to control the defrost system. These buses fail to conform to the requirements of federal motor vehicle safety standard no. 103, "windsheild defrosting and defogging system."
Consequence
If this condition affects the defrost system when it is required, it may decrease the driver's visibility, possibily resulting in a crash.
Remedy
Tci will notify owners and dealers will repair the buses free of charge. The safety recall began on April 29, 2010. Owner may contact tci at 1-845-988-0419.
Notes
Owners may also contact the national highway traffic safety administration's vehicle safety hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to http://www.safercar.gov.

Recall details

NHTSA campaign
10V168000
Reported to NHTSA
April 23, 2010
Filed by
TRANS TECH BUS
Owner notification
April 29, 2010
Vehicles potentially affected
192
Initiated by
the manufacturer
Components
Visibility › Power window devices and controls
Recall 10V168000 on nhtsa.gov, with the manufacturer’s documents

Vehicles covered

As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.

Has your Trans Tech been repaired?

Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.

NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Trans Tech dealer can also check your VIN. Recall repairs are free.