velvet drive 1:1 slipping during right turn |
Post Reply |
Author | |
emccallum
Platinum Member Joined: August-08-2006 Location: Clarks Hill SC Status: Offline Points: 1084 |
Post Options
Thanks(0)
Posted: June-20-2011 at 12:48pm |
Caddyshack....I couldnt reply to your email, as it isnt showing in your profile. I think my problem is carb related, and not the tranny. When I really feel the "slip" it seems more choking or fuel starving than a slip. I think the float may need adjusting.
|
|
Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13513 |
Post Options
Thanks(0)
|
My 1200 hr velvet drive does this as well in the cold spring/fall water. Keep the fluid absolutely full.
|
|
eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
Post Options
Thanks(0)
|
its stamped "made in the USA"
|
|
"the things you own will start to own you"
|
|
Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
Post Options
Thanks(0)
|
Eric, after some investigation, I found PCM calls it's unit "Power plus Vee" while Indmar's is "Ski Vee"
They look pretty similar, but i think you can take the shaft coupling is different in the units. |
|
eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
Post Options
Thanks(0)
|
I believe they bolt it to the pcm trans and it is referred to as the ski-vee. the only tag on it says Pleasure Craft Marine. this one is out of an 08 cc, so i would assume it is a ski-vee. looking at it from my perspective it does seem as a its a ZF child by design. I'll snap a couple pics today and post for future reference. it is water case cooled,
I would say since that indmar is a big customer of the ZF transmissions that it is a ZF ski-vee crossing over to the PCM line. surely this hunk of iron beats out the u-jointed, circ pumped competition |
|
"the things you own will start to own you"
|
|
Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
Post Options
Thanks(0)
|
Eric, is the PCM v-drive unit a ZF one? is it the same as Indmar's Ski vee?
|
|
eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
Post Options
Thanks(0)
|
pcm came up with a pretty nice v-drive unit, the way they are supposed to be designed, cast iron case, heavy Timken tapered bearings and helical cut gears, 2 moving parts, splash lubricated, and supposedly maintanance free. supposedly from the pencil caddy PE's they say you cant rebuild them But...its in my thoughts already on how to rebuild, i have to sleeve a bore and dial in where the old bearing was.
i got to hand it to them, its a stout, simple, rugged unit |
|
"the things you own will start to own you"
|
|
bbishop1974
Senior Member Joined: May-16-2010 Location: rindge,nh Status: Offline Points: 275 |
Post Options
Thanks(0)
|
eric,i love your babling.i'll take it over stereo install questions any day.
|
|
Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
Post Options
Thanks(0)
|
Oil level shoud be checked inmediately after engine shut off so you want to see full mark on the dipstick with the hoses and oil cooler filled with oil.
|
|
eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
Post Options
Thanks(0)
|
confuse, conquer, milkcrate lol
|
|
"the things you own will start to own you"
|
|
wingwrench
Senior Member Joined: December-11-2010 Location: Lakeland, FL Status: Offline Points: 155 |
Post Options
Thanks(0)
|
It's not babble as long as the subject is boats. |
|
Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
Post Options
Thanks(0)
|
I understand the part where you put it in a milkcrate and send it to Ohio. |
|
emccallum
Platinum Member Joined: August-08-2006 Location: Clarks Hill SC Status: Offline Points: 1084 |
Post Options
Thanks(0)
|
Thanks Eric, maybe I can get one more season. I may recheck the fluid level, just to be sure.
That was a bit more info than I needed, but I get your point. |
|
eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
Post Options
Thanks(0)
|
but a better understanding, the oil pressure in the pack has to overcome the return spring pressure, there is always oil in the forward pack and at times with weak return springs when you rev the engine the pack will momentarily apply because of a weak spring and the pressure created by the centrifical force
btw, when i babble, do you guy's understand this stuff? |
|
"the things you own will start to own you"
|
|
eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
Post Options
Thanks(0)
|
to get into the dynamics of a transmission, under higher RPM's, the centrifical force of the fluid in the forward drum will create pressure and should hold the clutch pack and not slip, unless you have hard or galled rubber seals and the pack may leak and allow a slip, on the turns they do take into account that you may pull air thru the screen and allow the pump to cavitate and intermittantly you would think the clutch pack would let loose. any time a pack slips you create flash heat on the plates and they will lose the co-efficiency of friction (ability to hold). I wouldnt say its time for a rebuild yet. but seeing the age of the trans it may need a facelift...it seems that the average lifespan of these Borgs is around 25 years, if maintained properly
|
|
"the things you own will start to own you"
|
|
emccallum
Platinum Member Joined: August-08-2006 Location: Clarks Hill SC Status: Offline Points: 1084 |
Post Options
Thanks(0)
|
Eric/all,
My velvet drive seems to slip every so slightly during hard right/starboard turns. I think it is slipping as I cant believe the prop is cavitating. Fluid is fresh and proper level. Otherwise, it engages f&R great. slight rattle at idle, but not more than it always has had for the last 250 hrs. Tranny is original 82. Am I heading for a rebuild soon? Engine has 570 hrs, tranny has more....how much? dont know probably 1000. |
|
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |