Differential Noise Failure Analysis, What Causes Noisy Gears? @ETCG1
Differential Noise Failure Analysis, What Causes Noisy Gears?  @ETCG1
Uploaded July 2020 | Updated September 2026, 9 hours ago
Those of you that have been following the #ETCGDadsTruck series know that I had a noise coming from the differential ever since I rebuilt it. I’ve since solved the problem with a new set of gears, but I decided to send the noisy gears off to be analyzed by a professional. In this video I share the results of that analysis and also talk about how you can avoid gear noise when rebuilding differentials.

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Check out my other channel for repair videos and the video where I go over this car for the first time: youtube.com/user/EricTheCarGuy?sub_confirmation=1

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Check out the ETCG Blog for the latest info: ericthecarguy.com/blog

Special thanks to Robert Bethel.

Links

Summit Racing: summitracing.com

More info on noise diagnosis: ericthecarguy.com/diagnosing-noises-in-your-car

Diagnosing Ring and Pinion Issues: onallcylinders.com/2014/03/21/gear-doctor-quick-guide-diagnosing-common-ring-pinion-issues

Tools

Pinion Depth Measuring Tool: raceplumbing.net/TD-Machine-11001-Pinion-Depth-Gauge-Deluxe-Dial-Indicator-Fixtures-GM-Dana-Ford-Mopar-Kit_p_84187.html

Dial Indicator Set (Checking Backlash): jbtoolsales.com/central-tools-3d102-dial-indicator-set-with-on-off-magnetic-base#oid=1002_1

Part Links

My Differential: summitracing.com/parts/aub-542022/overview/year/1990/make/chevrolet/model/c1500

My 3:73 Gear Set (Original): summitracing.com/parts/sum-741001

New Gear Set (Richmond): summitracing.com/parts/rmg-4900411

My Differential Cover: summitracing.com/parts/sme-8510300nl

Ratech Ring and Pinion Installation Kit: summitracing.com/parts/rat-3003k

Pinion Bearing Set: randysworldwide.com/product/pk-gm8-5

Related Videos

What’s That Noise in My Differential?: youtu.be/lv94-bItw-I

How To Use a Pinion Depth Measuring Tool: youtu.be/S61Ut8tOu1o

#ETCGDadsTruck Axle/Differential Rebuild (Part 1): youtu.be/F439MFi6qIk

#ETCGDadsTruck Axle/Differential Rebuild (Part 2): youtu.be/vkSvYCqrlOI

Last Minute Prep and Problems #ETCGDadsTruck: youtu.be/u0mBrFVET5Q

Dad Sees The Truck for the First Time: youtube.com/watch?v=EzcEu7V2OcA

What Does Dad Think of the Truck?: youtube.com/watch?v=49T8SYTkfbM

What Happened to Dads Truck Engine?: youtube.com/watch?v=RNzrdexY_Hw&t=7s

How Oil Pressure Works: youtube.com/watch?v=8f2fcbTh5yw&t=4s

Dads Truck Starts for the First Time (With Special Guests): youtube.com/watch?v=e5bDArrWvnI

#ETCGDadsTruck Playlist: youtube.com/watch?v=kCepnacqRuI&list=PLSzhQ6St-ov1g_GML2aVq6EN-_ShJ9G2o

**Answers to your Automotive Questions Here: ericthecarguy.com/faq

Social Network Links

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Differential Noise Failure Analysis, What Causes Noisy Gears?

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