Velvet Drive models

Determining Velvet Drive Models

Determining the correct model number of any inboard boat transmission can be a real task.  In this section we will try to give you information to make the task easier.  Ideally locating the factory tag which supplies not only the model number but the gear ratio and serial number as well is best.  So to start with here are the tag locations for Velvet Drive (and Borg-Warner) marine transmissions.


t One of the above units looks like mine - jump to "stright through models"

The above unit looks like mine - jump to "v-drive models"

CR-2 Reduction housing
This looks like my unit does - jump to "CR-2"

5000 Series & Liberty Series
This looks like my unit - jump to "5000S" models

 There is no tag on my stright through Velvet Drive transmission.  Now what do I do?

For direct drive (1:1 ratio) units it's not too hard to determine between a 71C and a 72C unit.  The
length and shape of the case are the indicators.  The 71C is 10-1/2 inches from the point it mounts
on the bellhousing to the end of the output flange.  The case is shaped as shown on the left of the
picture below.  The 72C is 11-7/16 inches from the point it mounts on the bellhousing to the output
flange.  That case shown on the right.  The difference between a 71C and the later model 1017 is
internal as is the differance between a 72C and a 1018.  Without disassembly you cannot tell the
differance.  And since they are the same unit except for this one internal change it really doesn't
matter anyway.

Without a tag it gets harder to determine what reduction model you have.  Again the difference
between the 71C and the 1017 is largely on the inside, also with the 72C and 1018.  However, if the
gear reduction sections haven't been changed the shape of the reduction housing can indicate if the
unit is a 71C or 72C or a later model 1017 or 1018.  The picture below shows the differance in the shape of the housings.  On the left is the reduction housing origianly  used on the 71C and 72C reduction models.  The housing on the right is from a later model 1017 or 1018.  Note that the 71C/72C
type housing has a bearing retainer plate with 6 bolts while the 1017/1018 type doesn't have this plate.  Also, the older units were equipped with a 4 inch flange (coupling) while the newer units have a
5 inch flange.  However, 5 inch flanges were available for the 71C/72C units and many were changed to
it.  Again, the newer and older reduction housings can both be used on either the 71C, 72C, 1017 or 1018 model units so depending on that to identify the model is chancy.

To tell the differance between a 71C/1017 model and a 72C/1018 model you need to measure the
case length from the bellhousing back to the end of the output flange.  "C" in the chart below.

 V-Drive model identification.

Only two (2) models were made in this configeration.  The 1004 and the 1005.  To determine which
you have measure from the bellhousing back to where the v-drive (hanging down part) case starts.
A 1004 is 8-37/64 inches and the 1005 measures 9-33/64 inches.

 5000 Series & Liberty Series

The only differance between the 5000 Series and Liberty Series is the addition of appx. 7 lbs. of
aluminum in the Liberty case.  They may be distinguished by the extra ridges on the outside of the
Liberty case.  The front the 5000 Series case has one vertical ridge.  This holds true for both the
Model 2001 & 2002 (v-drive) each with one ridge and the Model 3001 & 3002 (v-drive) units each
with more that one ridge.

 CR-2 Series 1013 and 1014 models

Both models of the CR-2 Series have the same distintive reduction housing and in the absence of a
tag is the best indicator of the Series type.  Determining the model requires measuring from the bell-
housing to the back of the output flange.  Model 1013 is 18.42 inches and Model 1014 is 19.36 inches.