Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

[rwerner43]

Just installed two new PCM motors in my Carver.

We put a ton of effort into deturmining which was standard and which was reverse but are not 100% sure of the outcome. We marched firing order from the old engines and have the trannys on the same side that they were removed from. Should be right but....

So I have finished the port motor, runs great, but tranny will not engage. Never had a bit of trouble with the trannys. Thought it may be wrong rotation as the pumps work in one direction.

So the tranny on the port engine has a "direction arrow" pointing out, to the port side showing clockwise rotation looking from the FRONT.

The engine rotates clockwise, looking from the FRONT to the belts. The same direction as the arrow on the tranny.

Is that correct?

 

[Don S]

Re: Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

The transmissions input shaft needs to turn the same direction as the flywheel on the engine turns.

 

[rwerner43]

Re: Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

OK so if the belts are turning clockwise when looking at it from the bow, and the "direction" arrow on the transmission shows the same rotation, is that correct?

 

[rwerner43]

Re: Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

BTW the tranny's are Borg Warner Velvet Drive 1.88:1 Model 10-17-108

 

[jonesy cc]

Re: Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

clockwise at the belt end is counterclock wise at flywheel , you need a clockwise at flywheel counter clockwise at belt end. this would be a reverse rotation motor . Ithink the timming cover off ,on old motor no chain is rev. rotation. there will be gear to gaer

 

[rwerner43]

Re: Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

Does anyone have an opinion looking at the image?

 

[rwerner43]

Re: Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

Still would love some feedback before I pull the motors.

 

[Fireman431]

Re: Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

clockwise at the belt end is counterclock wise at flywheel , you need a clockwise at flywheel counter clockwise at belt end. this would be a reverse rotation motor . Ithink the timming cover off ,on old motor no chain is rev. rotation. there will be gear to gaer

That's impossible. The crankshaft can only turn in one direction at a time and the harmonic balancer is bolted to the front and the flywheel to the rear. They will spin in the same direction. There is no possible way the flywheel would be spinning in the opposite direction. Now if you are speaking about viewing it from the front and then viewing it from the flywheel, your statement, however misleading, would be correct. The easier way to state it is that the engines rotation is to port. The pic you posted is correct.

When you engage the trans, can you see ythe shift lever of the transmission moving? Is all tight? If it is engaging fully, the main thing that would tell me is that the input shaft of the trans is slipping inside the flywheel.

 

[rwerner43]

Re: Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

Well I finally found the answer from a great Borg Warner guy. The 1.88:1 and 1.91:1 Velvet Drives have a reversing gear in them, all the others are straight through. So what I have, although it looks right, and we thought it was, is wrong.

Now to pull the motors, switch the tranny's and switch the placement of the motors. No problem, it is only 95 degrees right now!!!

 

[Luhrs28]

Re: Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

Here's how I would attack this: You have hoses going to and from a tranny oil cooler, right? Well Tee in a pressure gauge temporarily and run the engine. If the direction setup of the trans is correct you should see anywhere from 60 to 120psi on the gauge. If you have no pump pressure then either the rotation setup of the trans is wrong or the trans input shaft isn't coupled up to the flywheel damper.

If you have good pump pressure and it still won't engage then the trans is going to have to come out to see what's wrong.

 

[Lyle29464]

Re: Borg Warner Velvet Drive will not engage, new motors, Rotation issue?

Need to slow down a bit. The output is correct. If you change the transmissions that will be wrong. You need to change the input. To do this you just reverse the pump. remove transmission and look at the front pump. It will have 2 possible settings one for CCW engine and one for CW. Change it. ( google for picture)

In the back of my mind I try to figure out why?

My answers.

1. Transmissions labled wrong? 33%
2 Your in error on the rotation? zero % the engine is wired for a standard turn CCW ( looking from rear)
3. The old motors were turning inboard? 1% but I have seen it.
4 When they rebuilt the tranny's they changed the front pump. 33%
5. I would check the model numbers. I think they will tell you the output. One of mine has a L in the number.
6. Hate to see you make the wrong change.
7. The engine above is wired for a standard turn ie "LEFT" hand turn. ( looking from rear)
8. The transmission output is only correct if the decal is correct.
9. The front pump is wrong or the decal is wrong. 99%