What Model or Ratio Velvet Drive do I Have?
Transmission Assembly Number	Previous Trans. Assembly Number	Transmission Ratio
Forward	Reverse
10-17-000-001	AS1-71C	1:1	1:1
10-17-000-002	AS1-71CR	1:1	1:1
10-17-000-003	AS1-71CBR	1:1	1:1
10-17-000-004	AS1·:71CBR	1:1	1:1

10-17-000-005	AS2-71C	1.52:1	1.52:1
10-17-000-006	AS2-71CR	1.52:1	1.52:1
10-17-000-007	AS7-71C	1.91:1	1.91:1
10-17-000-008	AS7-71CR	1.91:1	1.91:1

10-17-000-009	AS3-71C	2.10:1	2.10:1
10-17-000-010	AS3-71CR	2.10:1	2.10:1
10-17-000-011	AS14-71C	2.57:1	2.57:1
10-17-000-012	AS14-71CR	2.57:1	2.57:1

10-17-000-013	AS15-71C	2.91:1	2.91:1
10-17-000-014	AS15-71CR	2.91:1	2.91:1
10-17-000-015	AS20-71C	1:1	1:1
10-17-000-016	AS20-71CR	1:1	1:1
10-17-000-108	None	1.88:1	1.88:1

10·18-000-001	AS11-72C	1:1	1.10:1
10-18-000-002	AS11-72CR	1:1	1.10:1
10-18-000-003	AS12-72C	1.52:1	1.68:1
10-18-000-004	AS12-72CR	1.52:1	1.68:1
10-18-000-1 06	None	1.88:1	2.07:1

10-18-000-005	AS17-72C	1.91:1	2.10:1
10-18-000-006	AS17-72CR	1.91:1	2.10:1
10-18-000-007	AS13-72C	2.10:1	2.31:1
10-18-000-008	AS13-72CR	2.10:1	2.31:1

10-18-000-009	AS14-72C	2.57:1	2.83:1
10-18-000-010	AS14-72CR	2.57:1	2.83:1
10-18-000-011	AS15-72C	2.91:1	3.20:1
10-18-000-012	AS15-72CR	2.91:1	3.20:1

10-18-000-013	AS20-72C	1:1	1.10:1
10-18-000-014	AS20-72CR	1:1	1.10:1
10-18-000-01'5	None	1:1	1.10:1
10-18-000-106	None	1:1	1.10:1
10-18-000-017	None	1:1	1.10:1

What Model or Ratio Velvet Drive do I Have?

Transmission
Assembly Number

Previous Trans.
Assembly Number

Transmission Ratio

Forward

Reverse

10-17-000-001

AS1-71C

1:1

10-17-000-002

AS1-71CR

1:1

10-17-000-003

AS1-71CBR

1:1

10-17-000-004

AS1·:71CBR

1:1

10-17-000-005

AS2-71C

1.52:1

10-17-000-006

AS2-71CR

1.52:1

10-17-000-007

AS7-71C

1.91:1

10-17-000-008

AS7-71CR

1.91:1

10-17-000-009

AS3-71C

2.10:1

10-17-000-010

AS3-71CR

2.10:1

10-17-000-011

AS14-71C

2.57:1

10-17-000-012

AS14-71CR

2.57:1

10-17-000-013

AS15-71C

2.91:1

10-17-000-014

AS15-71CR

2.91:1

10-17-000-015

AS20-71C

1:1

10-17-000-016

AS20-71CR

1:1

10-17-000-108

None

1.88:1

10·18-000-001

AS11-72C

1:1

1.10:1

10-18-000-002

AS11-72CR

1:1

1.10:1

10-18-000-003

AS12-72C

1.52:1

1.68:1

10-18-000-004

AS12-72CR

1.52:1

1.68:1

10-18-000-1 06

None

1.88:1

2.07:1

10-18-000-005

AS17-72C

1.91:1

2.10:1

10-18-000-006

AS17-72CR

1.91:1

2.10:1

10-18-000-007

AS13-72C

2.10:1

2.31:1

10-18-000-008

AS13-72CR

2.10:1

2.31:1

10-18-000-009

AS14-72C

2.57:1

2.83:1

10-18-000-010

AS14-72CR

2.57:1

2.83:1

10-18-000-011

AS15-72C

2.91:1

3.20:1

10-18-000-012

AS15-72CR

2.91:1

3.20:1

10-18-000-013

AS20-72C

1:1

1.10:1

10-18-000-014

AS20-72CR

1:1

1.10:1

10-18-000-01'5

None

1:1

1.10:1

10-18-000-106

None

1:1

1.10:1

10-18-000-017

None

1:1

1.10:1

Notice there are two or more model numbers for each ratio. Velvet Drive used different model numbers for each rotation input.
With exception to the 2.10:1 ratio you can change the pump to be used on the engine you have. Changing the front pump will have no effect on the output rotation. The transmission will do nothing if not indexed for the proper engine input rotation.

Typically Even current production model numbers are used on standard (automotive) rotation engines and odd current production model numbers are on opposite automotive rotation engines.

1.88:1 and 1.91:1 Ratio transmissions reverse the output rotation from the input rotation