Pontiac Tech Tip: Grinding and/or Growling Noise in Park on Incline

Pontiac Tech Tip: Grinding and/or Growling Noise in Park on Incline

Owners of some vehicles equipped with Hydra-Matic front wheel drive transaxles may comment on a grinding and/or growling noise that is noticeable when standing in PARK on a hill or slope with the engine running and the parking brake not applied.

Affected Models:
2007 and prior Pontiac passenger cars and light trucks with Hydra-Matic front wheel drive (FWD) automatic transmissions.

Service Information:
Owners of some vehicles equipped with Hydra-Matic front wheel drive transaxles may comment on a grinding and/or growling noise that is noticeable when standing in PARK on a hill or slope with the engine running and the parking brake not applied. Under these conditions, the weight of the vehicle puts a load on the parking pawl which can create a “ground-out” path through the drive axles, front struts, springs and spring towers. Normal engine noise can be transmitted to the passenger compartment through the “ground-out” path.

Owners concerned about this condition should be advised to apply the parking brake prior to shifting into PARK. This is the recommended procedure described in the owner’s manual. Applying the parking brake first will put the load of the vehicle on the rear brakes rather than on the parking pawl.

Refer the owner to the appropriate owner’s manual for additional details and instructions.

Courtesy of Mitchell 1.

For more information on Mitchell 1 products and services, automotive professionals can log onto the company’s website at www.mitchell1.com.

You May Also Like

Clarios Formalizes Joint Development Agreement with Altris

Altris will develop sodium ion cells for low-voltage tech while Clarios will lead in battery management systems, software, and system integration for battery design.

Clarios and Altris, a Swedish developer and prototype manufacturer of sodium-ion batteries, announced an exclusive Joint Development Agreement (JDA) for low-voltage mobility applications.

Under the new JDA, Altris will focus on developing the sodium ion cell technology for low-voltage applications, while Clarios will leverage its expertise in Battery Management Systems (BMS), software, and system integration to design the battery system. This development agreement enhances a collaboration agreement initiated earlier this year, which set in motion the creation of a detailed production plan for low-voltage vehicle batteries utilizing sodium-ion cells, the companies said.

Less is More with Cordless Work Lights

The automotive industry has reaped the benefits of LED lights more than any other industry.

Streamlight Wedge XT
Eaton to Supply ELocker Differential System to EV Manufacturer

The system leverages an electric motor to power the rear wheels and an electric motor or an optional ICE driving the front wheels.

Servicing EVs in Your Shop

Technicians need to learn how to correctly diagnose and repair electrical systems.

technician using laptop
Tool Time Podcast: Schrader TPMS

In this episode, Nadine and Eric sit down with Yanick Leduc to discuss all the TPMS solutions his company has to offer.

Other Posts

Eli Opens Reservations for its Micro-EV in the US

The new Eli ZERO represents a new category of high-tech, efficient and sustainable micro-EVs, according to Eli Electric Vehicles.

Hunter Engineering Releases New Alignment Coverage

Semi-annual specification update includes new and existing records.

#11 LED Work Lights

Light emitting diodes (LEDs) were a revolutionary development of electrical science.

LED Work Lights Feature
Eaton Receives 2024 Automotive News PACEpilot Award

Eaton was recognized for its 4-speed electrified vehicle transmission.