QU30037U USED 7 Tooth Plastic Speedometer Drive Gear for 1973-1990 Chevy and GMC New Process NP205 Part-Time Transfer Cases and 1973-1979 NP203 Full-Time Transfer Cases. May be Red or Natural color. Available while supplies last!

Also See: QU30037 New Speedo Gear

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Dan the Gear Man Tech Notes:
About
GM Only
1990-on

Tech Note 1: About
QU30037 plastic speedometer drive gear was introduced in some late 1973 or early 1974 Chevy and GMC transfer cases. Most 1973-1974 NP205 gear drive models still used smooth bore steel drive gears, however, as best as I can remember, plastic gears were used for just about all models by 1975, but, GM parts books do list the steel gear up to 1976.

Tech Note 2: GM Only
QU30037 Speedometer Gear for Chevy and GMC NP203 Chain Drive and NP205 Gear Drive Transfer Cases is a 7 tooth red or natural plastic gear with 38 internal splines that fits most GM NP205 Transfer Cases. It is unique to GM. It will NOT interchange with Dodge, Ford, and International gears!

Tech Note 3: 1990-on
I believe 1990 was the year GM switched to electronic signal generation. These cases have a steel reluctor wheel instead of a plastic drive gear. The electronic speedometer sending unit screws into the rear output housing. A magnet on the sending unit reads off the reluctor wheel. The rear output housing is different for electronic and mechanical speedometer versions.

Applications
NP203 Full-Time Transfer Cases: 1973, 1974, 1975, 1976, 1977, 1978, 1979
NP205 Part-Time Transfer Cases: 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990