Replace a worn one-way clutch element inside your automatic transmission with the Pioneer Automotive Industries Transmission Sprag, part number 764029. This automatic transmission sprag assembly is an exact-fit replacement for 297 listed applications, including the 1964-1976 Buick Riviera, 1965-1977 Cadillac DeVille, 1965-1977 Chevrolet Corvette, 1969-1975 Chevrolet Camaro, 1972-1977 Bentley Corniche and 1975-1977 Checker Marathon.
A sprag works as a one-way clutch. Its elements let the mating race turn freely in one direction and wedge to lock it in the other, so the transmission can hold or release a member at the correct point in the shift sequence. Pioneer builds its transmission components as exact-fit replacement parts made with no compromise.
Signs this part may need replacing: The transmission may slip or have no drive in a particular gear. Shifts may flare or be delayed, or the transmission may freewheel where it should hold. These symptoms can have other causes, so diagnose the transmission before replacing the sprag.
See the Buyer's Guide tab for the full application list and engine details.
What does a transmission sprag do?
It acts as a one-way clutch inside an automatic transmission. It turns freely in one direction and locks in the other, so a transmission member is held or released at the right time.
Which vehicles does Pioneer 764029 fit?
It is listed for 297 applications, including the 1964-1976 Buick Riviera, 1965-1977 Cadillac DeVille and 1969-1975 Chevrolet Camaro. See the Buyer's Guide tab for the full list.
What are signs of a failing sprag?
Possible signs include slipping or no drive in a particular gear, flared shifts, or freewheeling where the transmission should hold. These can have other causes, so diagnose before replacing.
Is this an exact-fit part?
Yes. Pioneer describes its transmission components as exact-fit, no-compromise replacement parts for the listed applications.
Can I install the sprag myself?
Replacing a sprag requires disassembling the automatic transmission. An experienced technician should do the job, following the vehicle's service information.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
