Velvet Drive 5000 Marine Transmission Overheat Diagnosis and Repair

Using a cooler flow gauge we determined that there was a loss of pressure in the LH rotation position. Upon disassembly it was noted that the sealing rings were badly worn and the insert in the case was grooved. A used insert was installed and the transmission was completely disassembled, clutches inspected and resued along with new gaskets and seals. We tested it after repair on our dyno to verify the repair. Vessel is a 39' Carver with a pair of 7.4L MPI Mercruiser's. This was the port side. Velvwlt Drive 5000 2.8:1 ratio. The original concern was after about 20 minutes up on plane the alarm would sound and the transmission was over 210 degrees F.

[joeshmoe]

Great diagnosis. There's no substitute for experience.

[TodayIWorkOn]

I have a velvet drive that has a similar situation. We are going to pull it in the early spring and probably open it up to see what happened. This video was so helpful! Do you have any rebuilt MODEL 20-02-0051
RATIO 2.5011 Serial 5200 laying around I can purchase? I'm a buyer!

[hilarykerns]

My HS1A runs hot, any ideas ?
the cooler has plenty of water running through

[bebitte]

Do you built yourself this dyno or you buy it somewere?

[justlooking]

How many of these have you rebuilt in your lifetime?