B-CA trans swap

Jeff SEMI · Aug 29, 2010

Would a B have a faster road speed with a four speed from a CA or do both transmissions have 1:1 ratio in high gear?

Dick L · Aug 29, 2010

8 1/2 mpr for the B and 1 1/2 mpr for the CA but I would guess a lot of the difference is in tire size.

The B that I mow with is on 8 - 24 and the other ones are on 11.2 - 24 and there is quite a difference in ground speed.

Jeff B. · Aug 30, 2010

Well, Dick is right. without knowing for sure I can assure you that both trannys are 1:1 in high gear.( I don't think they made overdrive ratios in those units) Your speed will come from tire size and rpm.

Brian G. NY · Aug 30, 2010

I agree with Jeff; 1:1 in high, whether it's a 3 or 4 speed. So.....tire size determines the road speed. The real plus in the 4-speed, is the better selection in all the lower gears.
Of course the tire size impacts the lower gears as well, but not as noticeably.

B-CA trans swap

Jeff SEMI

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Dick L

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Jeff B.

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Brian G. NY

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