DescriptionNew and unpainted ZF 63A marine transmission. Gear ratio is 2.5:1. Down-angle is 8 degree. Owner’s manual included. For standard-rotation engines only (same as automotive rotation). Can be shifted either direction for forward (A or B, fully-reversing). Output coupler overall diameter is 5-7/32″, bolt center-to-center diameter is 4-1/4″. 4 evenly-spaced bolt holes. Does not come with any accessories. View coolers, adapters, or damper plates if you need any accessories, or send a message for help.
If you are not sure if this is the correct transmission, or you want to learn more about ZF transmission types, hp ratings, and ratios, you can view the comprehensive ZF transmission selection guide here (PDF).
This transmission is sold by an official ZF dealer with full warranty support.
To improve transmission longevity and to preserve the factory warranty, please follow these guidelines when purchasing, installing, and running a new transmission:
- If you ever had water or metal debris in the oil previously, or your old transmission failed, you should replace your oil cooler, lines, and fittings. If not, and your oil cooler is in good condition and not too old, you should have it flushed and inspected.
- If your damper plate is old or worn, has any visible cracks or damage, or has loose springs (for spring type dampers), replace it. If you’re changing from a Volvo MS-series transmission to a ZF, you’ll also need to switch from the original spring type to a Centa bushing type damper.
- Change your transmission fluid regularly following your factory owner’s manual guidelines. Never go more than a year between oil changes.
- On transmissions with an oil filter, replace it as needed following your factory owner’s manual guidelines.