What’s That Noise in My Differential?
What’s That Noise in My Differential?
This video chronicles what I went through to diagnose a whining noise coming from the 10 bolt (8.5” 30 spline) differential of my 1990 C1500 truck (GMT400/OBS). The noise has been there ever since I installed a new carrier and gears last year.
I cover checking backlash, measuring pinion depth, bearing inspection, gear tooth patterns, and fluid inspection.
I hope you find this information useful!
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Summit Racing: https://www.summitracing.com
More info on noise diagnosis: https://www.ericthecarguy.com/diagnosing-noises-in-your-car/
Diagnosing Ring and Pinion Issues: https://www.onallcylinders.com/2014/03/21/gear-doctor-quick-guide-diagnosing-common-ring-pinion-issues/
Pinion Depth Measuring Tool: https://www.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): https://www.jbtoolsales.com/central-tools-3d102-dial-indicator-set-with-on-off-magnetic-base#oid=1002_1
Bleepin Jeep Pinion Tool: https://store.bleepinjeep.com/product/yoke-wrench-tool/
Astro Pneumatic Bushing/Seal Driver Kit: https://www.jbtoolsales.com/astro-pneumatic-7824-bearing-race-and-seal-driver-set#oid=1002_1
Milwaukee 1/2” (the big one): https://milwaukeetool.com/Products/Power-Tools/Fastening/Impact-Wrenches/2863-22
1/2” Breaker Bar: https://www.jbtoolsales.com/k-tool-23081-chrome-breaker-bar-1-2-drive-24-long#oid=1002_1
Torque Wrench: http://www.rakuten.com/prod/282405511.html
My Differential: https://www.summitracing.com/parts/aub-542022/overview/year/1990/make/chevrolet/model/c1500
My 3:73 Gear Set (Original): https://www.summitracing.com/parts/sum-741001
New Gear Set (Richmond): https://www.summitracing.com/parts/rmg-4900411
My Differential Cover: https://www.summitracing.com/parts/sme-8510300nl
Ratech Ring and Pinion Installation Kit: https://www.summitracing.com/parts/rat-3003k
Pinion Bearing Set: https://www.randysworldwide.com/product/pk-gm8-5/
How To Use a Pinion Depth Measuring Tool: Video link posted when available.
#ETCGDadsTruck Axle/Differential Rebuild (Part 1): https://youtu.be/F439MFi6qIk
#ETCGDadsTruck Axle/Differential Rebuild (Part 2): https://youtu.be/vkSvYCqrlOI
Last Minute Prep and Problems #ETCGDadsTruck: https://youtu.be/u0mBrFVET5Q
Introduction to #ETCGDadsTruck Build (Episode 1): https://youtu.be/kCepnacqRuI
#ETCGDadsTruck 4” Rear Suspension Drop (Part 1) (Episode 3): https://youtu.be/VNnEiIoGpwE
#ETCGDadsTruck 4” Rear Suspension Drop (Part 2) (Episode 4): https://youtu.be/63SfLDsdKRs
#ETCGDadsTruck Playlist: https://www.youtube.com/watch?v=kCepnacqRuI&list=PLSzhQ6St-ov1g_GML2aVq6EN-_ShJ9G2o
The #FairmontProject Playlist: https://www.youtube.com/watch?v=L22GsHQi7tU&list=PLSzhQ6St-ov2nxWVKCeU14Vt7JJ_QSZvs
**Answers to your automotive questions found here: http://www.ericthecarguy.com/faq
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