IIRC, 700r-4
hydromatic 400
The 1989 Chevrolet Vandura with a V6 engine typically comes equipped with a 4-speed automatic transmission, specifically the TH700R4. This transmission is known for its overdrive capability, which improves fuel efficiency during highway driving. It's important to verify the specific configuration, as some models may have different transmission options.
stickshift
The 1989 GMC G-Series Vandura takes 16" replacement windshield wiper blades on both sides front.
change your transmission fluid and transmission filter if the problem persists then your transmission is most likely no good.
700 r4 also known as L60 transmission...
I believe that was an ( A4LD ) automatic transmission with the 4 cylinder engine on a 1989 Ford Mustang
The 1990 GMC Vandura 3500 typically uses the GM 4L80-E automatic transmission. This heavy-duty transmission is known for its durability and is often paired with the larger V8 engines found in the Vandura line. It features a four-speed design with overdrive, providing better fuel efficiency and performance compared to older transmissions.
you could use regular transmission fluid.
To remove the transmission from a 1992 GMC Vandura, first ensure the vehicle is securely lifted and supported. Disconnect the battery, then remove the driveshaft, exhaust, and any components obstructing access to the transmission. Unbolt the transmission from the engine and the crossmember, disconnect the shift linkage, and then carefully slide the transmission out of the bell housing. It may be helpful to use a transmission jack for support during this process.
Most likely a 700R-4 But it might be a 4L60E
10W30