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#5 lower case the same as a #4?

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#5 lower case the same as a #4?

Old 11-09-2017, 08:43 PM
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Default #5 lower case the same as a #4?

interchangeable?
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Old 11-09-2017, 09:42 PM
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Yes
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Old 11-09-2017, 09:52 PM
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I don't think you can put #4 gears, shafts and bearings in a #5 case or vise versa, can you? I think to do the swap, the lower would need to be complete with the correct internals in it.

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Old 11-09-2017, 10:14 PM
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Complete will bolt up.
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Old 11-10-2017, 06:15 AM
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Good question and I'd like to know the answer as well. As for a complete lower swap I believe one potential issue could be the polygon vertical shaft in a SSM IV, not sure the V used a polygon shaft.
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Old 11-10-2017, 08:03 AM
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So what is the weak area of the #4? The upper or lower? I know that Gary sells straight cut gears for the #4 that will make it equal to, or close to as strong as a #5.
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Old 11-10-2017, 01:32 PM
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A SSM4 is a shortened SSM3. A SSM5 is a shortened SSM3A. I believe the main difference is 3A and 5 have bigger shafts.
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Old 11-10-2017, 05:30 PM
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The gears are better in the 5 vs 4 and the bearings are bigger as well. Other than the prop shaft, I don't think there is much difference in the actual shaft size in 4 vs 5. They are cut different. Splined (5) vs polygon (4), but as far as I know, the overall diameter is the same.
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Old 11-10-2017, 05:58 PM
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Finally got a hold of Collabella ,.. the 2 are not interchangeable.
The 5 lower has bigger stuff in it..
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Old 11-11-2017, 06:51 AM
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That makes sense 'cause I researched putting 5 lower intervals in a 4 housing and that wasn't an option.
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