Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1987ELECTRA ESTATE WAGON V8-307 5.0LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLEDESCRIPTION AND OPERATION
1987 Buick Electra Estate Wagon V8-307 5.0L
Automatic Transmission/Transaxle: Description and Operation
1987 Buick Electra Estate Wagon V8-307 5.0LSECTION Description and Operation
DESCRIPTION
This transmission is a fully automatic unit consisting primarily of a three-element hydraulic torque converter with a converter clutch, a compound planetary gear set and an overdrive unit. Five multiple-disc clutches and a band provide the friction elements required to obtain the desired function of the compound planetary gear set and the overdrive unit
The torque converter couples the engine to the overdrive unit and planet learn through oil and provides torque multiplication. he combination of the compound planetary gear set and the over-drive unit provides four forward ratios and one reverse. Fully automatic changing of the gear ratios is determined by vehicle speed and engine torque.
The hydraulic system in this transmission is pressurized by a variable capacity vane type pump to provide the working pressure required to operate the friction elements and automatic controls.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.