The best replacement for 4.10 is 3.73.

The best alternatives to 4.10 are rated as following:
★★★★★  3.73
★★★★★  4.30 gears
★★★★  4.11
★★★★  3.73 gears
★★★  4.56 gears
★★★  4.88
★★★  4.56
★★★  3.73 mustang
★★★  3.55
★★★  4.30
★★  3.73 jeep
★★  3.42
★★  4.88 gears
★  3.73 gear ratio
★  3.73 rear axle ratio
★  3.73 mustang gt
★  3.55 gears
★  3.73 duramax
★  3.90
  gears
  3.90 gears
  3.92
  3.73 axle ratio
  3.73 towing
  3.73 silverado
  3.91
  3.73 rear end

Your alternative for 4.10 is not listed? Suggest!
Speaking about 4.10, one probably shouldn't forget about 700r4.

Other search terms related to 4.10 and their ratings are:
★★★★★ 700r4
★★★★ t56
★★★★ 35s
★★ aod
You have in mind a companion for 4.10 and it is not yet here? Propose!



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4.10
3.73
4.30 gears