Thread Tools Search this Thread Display Modes
Old 09-03-2015, 08:14 AM   #1
Veteran Member
City: Portsmouth
Country: USA
Join Date: Jun 2009
Posts: 32
Transmission replacement

I currently have a 71c 10-17 velvet drive 2.1:1 transmission behind a perkins 6-354.

Unfortunatley the tranny is shot. There was a driver saver between the shaft and transmissiont that was shreaded,cause unknown but suspect hitting a submerged object. The trans has been destroyed also. Looking at alternatives, possibily replacing with a 72c same ratio, or sourcing another 71c. Anyone have any suggestions or experience with this set up?

Twilight time is offline   Reply With Quote
Old 09-03-2015, 08:53 AM   #2
Forkliftt's Avatar
City: Biloxi Mississippi
Country: USA
Vessel Name: Patricia Louise II
Vessel Model: 1983 42' Present Sundeck
Join Date: Oct 2007
Posts: 2,450
Destroyed as in case/ shaft damage?? These aren't nearly as available as one for a Chevy truck- so repair might be a better option??

1983 Present 42 Sundeck
Twin Lehman 135's

Steve Point Cadet/ Biloxi, Mississippi USA
*Present 42 twin 135 Lehmans
Forkliftt is offline   Reply With Quote
Old 09-03-2015, 09:21 AM   #3
siestakey's Avatar
City: Sarasota,FL/Thomasville,GA
Country: USA
Vessel Name: Steppin Stone IV
Vessel Model: Marine Trader Kelly Trawler 46
Join Date: Jul 2013
Posts: 1,792
Send a message via Skype™ to siestakey
Do not see one with the same ratio but ebay has several rebuilt and used

velvet drive marine transmission | eBay
Skype roatan63
siestakey is offline   Reply With Quote
Old 09-04-2015, 09:59 AM   #4
City: Anacortes
Country: USA
Join Date: Nov 2012
Posts: 784
The 71c is a very basic, well travelled machine. Behind the typical power of a Perkins 354, they typically last a long time. Yes, there are stronger transmissions out there, but if it were me on my own boat, I'd just replace like with like.

You can get an excellent rebuilds of this unit.
ghost is offline   Reply With Quote
Old 09-04-2015, 09:31 PM   #5
Datenight's Avatar
City: Noank, CT
Country: USA
Vessel Name: Datenight
Join Date: Jan 2008
Posts: 535

When the Velvet drive went in the old boat I took it to a local transmission shop. Complete rebuild for $750.00 in 2011. I did the removal and installation.

North Pacific 39
Datenight is offline   Reply With Quote
Old 09-05-2015, 12:17 AM   #6
Nomad Willy's Avatar
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 16,093
Stay w the BW and you probably won't need to raise your engine 2 to 4".

North Western Washington State USA
Nomad Willy is online now   Reply With Quote
Old 09-09-2015, 11:17 PM   #7
JDCAVE's Avatar
City: Lions Bay, BC
Country: Canada
Vessel Name: Phoenix Hunter
Vessel Model: Kadey Krogen 42 (1985)
Join Date: Apr 2011
Posts: 2,226
Transmission replacement

If money was no object...Twindisc.

Sent from my iPad using Trawler Forum
JDCAVE is offline   Reply With Quote
Old 09-16-2015, 12:22 AM   #8
City: Anacortes
Country: USA
Join Date: Nov 2012
Posts: 784
Pretty sure the twin disc would have a different down angle than the 71c. Nothing like changing motor mounts and everything else to get 30 years out of the next build instead of 25.
ghost is offline   Reply With Quote
Old 09-16-2015, 03:21 AM   #9
kapnd's Avatar
City: hawaii
Country: usa
Vessel Name: #31
Vessel Model: ex-Navy MUB 50 fish/cruise
Join Date: Aug 2013
Posts: 543
If the dimensions will work, the 72 is a way beefier trans.
If you hit something solid enough to wreck the drivesaver, you would know it, and your prop would be a pretzel. The drivesaver is intended to protect your tranny from such trauma.
Things like poor alignment, or bolts falling out of the coupling can wreck a drivesaver. The transmission failure may have occurred later, after the seals gave up and all the oil leaked out.

kapnd is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 10:58 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012