5-Bolt Shifting 8000 Series

5-Bolt Quick-Change Rear Axle

This new rear end is nearly ready for release. It is a very strong design and is ready for the horsepower of today's TQ midgets or similar sized racecars. It has a special Acro Exclusive ring and pinion that allows it to be stronger without sacrificing weight and size. The size and weight of this new rear isn't much more than our current 7000 Series 4-bolt design.

We have designed this as a system to be upgraded in stages if desired. This means your current driveline, axle, hubs, etc., may be able to be used with this rear, saving on upgrade costs.

This rear end is available with 11⁄2" diameter axles (steel or aluminum), 13⁄4" diameter splined aluminum axles, or our all-new 13⁄4" diameter extra-light hollow-core splined axle.

5-Bolt Quick-Change Rear End 5-Bolt Quick-Change Rear End 5-Bolt Quick-Change Rear End 5-Bolt Quick-Change Rear End

5-Bolt Quick-Change Rear End 5-Bolt Quick-Change Rear End 5-Bolt Quick-Change Rear End

5-Bolt Quick-Change Rear End


Click to view or download:

Acro 5-Bolt Quick-Change Gear Ratio Chart
Ultimate
Ratio 		Lower
Gear #		 Upper
Gear #		   Ultimate
Ratio 		Lower
Gear #		 Upper
Gear #
15.340 18s 47   9.038 26 40
15.014 18s 46s   8.813 26s 39
14.533 19 47   8.587 26s 38s
14.224 19s 46   8.486 27 39
13.914 19s 45s   8.269 27s 38
13.513 20 46   8.051 27s 37s
13.219 20s 45   7.973 28 38
12.925 20s 44s   7.763 28s 37
12.589 21 45   7.554 28s 36s
12.310 21s 44   7.496 29 37
12.030 21s 43s   7.293 29s 36
11.750 22 44   7.091 29s 35s
11.483 22s 43   7.050 30 36
11.216 22s 42s   6.854 30s 35
10.984 23 43   6.658 30s 34s
10.728 23s 42   6.633 31 35
10.473 23s 41s   6.444 31s 34
10.281 24 42   6.254 31s 33s
10.036 24s 41   6.242 32 34
9.792 24s 40s   6.059 32s 33
9.635 25 41   5.875 32s 32s
9.400 25s 40   5.875 33 33
9.165 25s 39s  
Acro 5-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 #
5.875 33 33   3.582 41 25
5.697 33 32s   3.525 40s 24s
5.529 34 32   3.439 41 24s
5.519 33s 31s   3.357 42 24
5.357 34 31s   3.296 41s 23s
5.204 35 31   3.217 42 23s
5.184 34s 30s   3.142 43 23
5.036 35 30s   3.077 42s 22s
4.896 36 30   3.006 43 22s
4.868 35s 29s   2.938 44 22
4.733 36 29s   2.869 43s 21s
4.605 37 29   2.804 44 21s
4.569 36s 28s   2.742 45 21
4.446 37 28s   2.670 44s 20s
4.329 38 28   2.611 45 20s
4.287 37s 27s   2.554 46 20
4.174 38 27s   2.481 45s 19s
4.067 39 27   2.427 46 19s
4.020 38s 26s   2.375 47 19
3.917 39 26s   2.299 46s 18s
3.819 40 26   2.250 47 18s
3.766 39s 25s   2.203 48 18
3.672 40 25s
3-Bolt Non-Shifting 6000 Series

3-Bolt Non-Shifting 6000 Series
(For use with in-out boxes)
4-Bolt Shifting 7000 Series

4-Bolt Shifting 7000 Series

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