Chaning Differential Fluid
12-07-2005, 03:45 PM
#13
Registered User
Diff.: Mobil 1 75W-90 Synthetic hypoid gear oil, 1 qt.
Torque the fill/drain bolts to 33 lb. ft.
Drain washer is 14mm, Fill washer is 20mm
Works for me...
For the other stuff:
Tranny: GM Synchromesh Friction Modified, 2 qt. (do NOT use Penzoil Synchromesh)
Torque fill to 33, drain to 29 lb. ft.
Can't remember washer sizes for these...
Clutch: DOT-3 brake fluid, 1-2 mini bottles
Torque the fill/drain bolts to 33 lb. ft.
Drain washer is 14mm, Fill washer is 20mm
Works for me...
For the other stuff:
Tranny: GM Synchromesh Friction Modified, 2 qt. (do NOT use Penzoil Synchromesh)
Torque fill to 33, drain to 29 lb. ft.
Can't remember washer sizes for these...
Clutch: DOT-3 brake fluid, 1-2 mini bottles
12-07-2005, 06:18 PM
#15
Diff fill - 23mm box end wrench
Diff drain - 24mm socket
I set my torque wrench to ~30-31 for all of these. It's close enough, considering my cheap torque wrench is probably only good to +-10%.
You can't get a torque wrench on the diff fill plug, so get a feel for what 30lb-ft feels like from the others and do this one by feel. After you've done several fluid changes, you will start to notice when the crush washer compresses (a good time to stop, BTW) - that's another reason you should a new washer every time.
If something comes together for Saturday morning, I might be available for a fluid-change get together.
Diff drain - 24mm socket
I set my torque wrench to ~30-31 for all of these. It's close enough, considering my cheap torque wrench is probably only good to +-10%.
You can't get a torque wrench on the diff fill plug, so get a feel for what 30lb-ft feels like from the others and do this one by feel. After you've done several fluid changes, you will start to notice when the crush washer compresses (a good time to stop, BTW) - that's another reason you should a new washer every time.
If something comes together for Saturday morning, I might be available for a fluid-change get together.
12-08-2005, 04:58 AM
#17
Man, you really want it all.... 
Tranny fill is a 3/8" square head - use a 3/8" socket wrench without a socket.
I *think* the drain uses the same 17mm socket as the oil drain plug.
Random tip for anyone doing a tranny of diff change for the first time - remove the fill plug before the drain plug. That way, if you can't get it out, you can give up BEFORE you've drained the fluids, and car is still driveable.
Tranny fill is a 3/8" square head - use a 3/8" socket wrench without a socket.
I *think* the drain uses the same 17mm socket as the oil drain plug.
Random tip for anyone doing a tranny of diff change for the first time - remove the fill plug before the drain plug. That way, if you can't get it out, you can give up BEFORE you've drained the fluids, and car is still driveable.
12-08-2005, 05:32 PM
#19
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Ive changed all my Fluids to royal purple huge difference the car runs like a brand new car. Also while your at it check your plugs and or change them while you have time. This will also make the car feel alot better. I had also read about cleaning the TB with some carb cleaner for a smoother Idle
12-08-2005, 05:50 PM
#20
Registered User
Changing your fluids at 19,000 with ANYTHING is going to make the car seem a lot better, especially if it has been beat on, bt if the purple stuff floats your boat, go for it. Unless there is something wrong, though, changing the plugs at that early of an age is a waste of money. There probably won't be much buildup on the TB at 19k, and even so, I can't imagine idle being smoother due to a cleaning... spraying that crap in there takes too high a risk of getting the MAP sensor eaten alive.