4-Bolt Shifting 7000 Series

(also available as non-shifting)

4-Bolt 7000 Series shown with splined axle 4-Bolt 7000 Series shown with splined axle

Complete 13⁄4" diameter splined axle unit without hubs, brakes, or carrier bearings. Brake optional.

4-Bolt 7000 series shown with offset 4-Bolt 7000 series shown with offset

Complete 11⁄2" diameter keyed axle with optional hubs and brake.

Introduced in 1996, this rear end has an internal shifter to shift it in or out of gear. This unit can be purchased with any style axle and any style hub we offer. The photos show how the center section can be mounted on the axle to suit your installation needs.

Click to view or download:


Acro 3-Bolt & 4-Bolt
Quick Change Gear Ratio Chart
Acro gears will replace Davis or Peck.
(Acro) (Number of Teeth) (5:14 Ring & Pinion)   (Acro) (Number of Teeth) (5:14 Ring & Pinion)
Set No. Top Bottom Ultimate Ratio   Set No. Top Bottom Ultimate Ratio
1 27 27 5.14   18 33 20s 8.481
2 27 26s 5.337   19 34 20 8.738
3 28 26 5.535   20 33s 19s 8.927
4 28 25s 5.756   21 34 19s 9.197
5 29 25 5.962   22 35 19 9.468
6 29 24s 6.210   23 34s 18s 9.708
7 30 24 6.425   24 35 18s 9.994
8 29s 23s 6.480   25 36 18 10.280
9 30 23s 6.704   26 35s 17s 10.582
10 31 23 6.927   27 36 17s 10.884
11 30s 22s 7.009   28 37 17 11.187
12 31 22s 7.242   29 36s 16s 11.565
13 32 22 7.476   30 37 16s 11.886
14 31s 21s 7.587   31 38 16 12.207
15 32 21s 7.832   32 37s 15s 12.678
16 33 21 8.077   33 38 15s 13.021
17 32s 20s 8.224   34 39 15 13.364
Acro 4-Bolt Quick-Change
Inverted Gear Ratio Chart
For use with transmission-driven setups.
Ultimate
Ratio		 Lower
Gear #		 Upper
Gear #		   Ultimate
Ratio		 Lower
Gear #		 Upper
Gear #
5.140 26s 26s   3.115 33 20s
4.950 27 26s   3.024 34 20
4.773 28 26   2.959 33s 19s
4.589 28 25s   2.872 34 19s
4.431 29 25   2.790 35 19
4.254 29 24s   2.721 34s 18s
4.112 30 24   2.643 35 18s
4.077 29s 23s   2.570 36 18
3.941 30 23s   2.497 35s 17s
3.814 31 23   2.427 36 17s
3.769 30s 22s   2.362 37 17
3.648 31 22s   2.284 36s 16s
3.534 32 22   2.223 37 16s
3.482 31s 21s   2.164 38 16
3.373 32 21s   2.084 37s 15s
3.271 33 21   2.029 38 15s
3.213 32s 20s   1.977 39 15
3-Bolt Non-Shifting 6000 Series

3-Bolt Non-Shifting 6000 Series
(For use with in-out boxes)

5-Bolt Shifting 8000 Series
All-new design

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