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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Links
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/
Tools
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
Part Links
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/
Related Videos
How To Use a Pinion Depth Measuring Tool: https://youtu.be/S61Ut8tOu1o
#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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Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy®.