How-to Rebuild GM 9.5" 14 Bolt (Truetrac and 4.10 Gears) - GMT400 Restoration Ep.4

Hey y'all, In this video I give you step-by-step directions on how to rebuild, regear, or lock/lsd a 9.5" GM semi-floater 14 bolt. I used a Detroit Truetrac and Yukon 4.10 gears. Parts #s are available at the beginning of the video. Setup specs per Yukon manual OEM Shim Depth: .030" (Mine was measured to .025, so it may depend on year) Pinion preload with new bearings: 15-22 inch lbs pinion preload with old bearings: 7-9 inch lbs backlash: 6-10 thousands of an inch ring gear bolt torque: 75 foot lbs main cap torque: 80 foot lbs 1. Remove Bearing caps. (Orientation matters, mark Top/Bottom L/R) 2. Mark/Score adjuster (If you intend on reusing stock gears) 3. Remove the bolt that holds the cross-shaft pin 4. Remove the cross-shaft pin 5. C-CLIP Removal (Use ring pliers if you have them) (May have to press on the axle shaft to expose them) 6. Remove Axle Shaft 7. Run adjustment collar back about 3 turns. (If you intend on reusing stock gears.) 8. Carrier should come out now. (Heavy! Don’t drop.) 9. Run adjustment collar back to stock spec (~3 turns) 10. Replace bearing caps for safe keeping / correct orientation 11. Remove yoke nut 12. Partially thread back on (so yoke doesn’t fly off) 13. Beat yoke loose 14. Remove nut and yoke 15. Remove pinion. Best practice is with a hammer and appropriate punch. DO NOT HAMMER ON THE THREADS / Partially threaded NUT. At least if you plan on reusing your gears. (Deadblow hammer / block of wood) 16. Remove outer pinion race 17. Remove inner pinion race (USE BRASS ONLY – Don’t damage the housing!) Mistakes were made using steel punch. Had to file/sand surface flat 18. Remove axle seal 19. Remove axle bearing 20. Clean the housing, magnet, and gasket surface. 21. Clean surface, and under bearings 22. Oil and install new axle bearings 23. New axle seals 24. Install pinion races 25. Make pinion setup bearings 26. Measure shims 27. Install setup bearings with shims 28. Install yoke/pinion WITHOUT seal 29. Tighten yoke so there is no play in the pinion 30. File down carrier / gears for any burs, want mating surface to be completely flush. Reusing gears but new carrier/locker – use a brass punch and work the old ring gear off. The bolts on it are REVERSE THREAD. Turn right to loosen. You can NOT reuse ring gear bolts. You need to order new ones. Can cut heads off the old bolts and use them as alignment studs. 31. Install ring gear on your carrier like this. The guy at the shop span the carrier while beating it with a mallet. Used the OLD bolts to draw the gear on. Said the ring gear will fully seat when I torque new bolts. (Also recommended freezing the carrier / baking the gears to make it easier.) 32. – Missing, Pressing carrier bearings on. Explain it 33. Install new bolts, use locktite Torqued in a star, from 60ft to 85 (I think) 34. Install carrier 35. Backlash and runout check 36. Pattern check 37. remove carrier and pinion 38. Press new bearings onto pinion 39. Final pinion install with new crush sleeve 40. Pinion seal and yoke installed 41. Pinion nut installed with red loctite 42. Torque crush sleeve to 15-22 in-lbs 43. Final Carrier Install 44. Install your shims, and tighten carrier preload. 45. Torque down main caps 46. Final runout and pattern check 47. Axle shafts and c-clips in 48. Axle spacer, cap and clip 49. Drums, Wheels on 50. Testing the truetrac 51. Cover and gasket on Some other videos I would recommend: milkcrate82- '81 14 bolt rebuild    • CHEVROLET 3/4 TON REAR BRAKES AND WHEEL BE...   jk gear and gadgets - 10.5 14 bolt rebuild    • 14 Bolt Axle Regear And Locker Install - J...   Hagerty - 12 bolt rebuild    • GM 12-Bolt rear diff UPGRADE: Positraction...   mowerdog - truetrac installation    • How to install a Detroit Truetrac limited ...