80/90 weight is the usual recommendation. If it's a posi, don't forget the posi additive.
transmission fluid
Any Dexron fluid will work fine.
you have to drop the entire pan since there is no plug and you might as well change the filter and gasket while you have it off
75-140 synthetic
it goes in the same tube where the dip stick is at. just dont over fill add a little at a time or it will leak
For the Pontiac Aztek, the recommended differential fluid is typically a synthetic gear oil with a viscosity rating of 75W-90. It's important to check the owner's manual for specific recommendations and fluid specifications, as there may be variations depending on the model year and drivetrain configuration. Additionally, using a fluid that meets the API GL-5 standard is advised for optimal performance.
Synthetic 75w90
If your 1992 Pontiac LeMans won't shift into gear, first check the transmission fluid level and condition, as low or dirty fluid can cause shifting issues. Inspect the clutch fluid and the clutch master/slave cylinder for leaks or damage if it's a manual transmission. Additionally, examine the shift linkage and cables for any obstructions or misalignments. If these steps don't resolve the issue, it may be necessary to consult a mechanic for further diagnosis and potential repairs.
90 weight gear oil
You can use any SAE certified rear differential fluid in your 1970 Chevrolet. The 1970 Chevrolet differential fluid can be checked from the differential fluid check port.
Under the car on the upper side of the transmission, you will find a plug. Remove the plug and stick your finger in the hole. If you feel fluid, it is full. If not add the proper lube as stated in the owner's manual.
gm syncromesh synthetic