Transmission Fluid Change

Drain and replace transmission fluid in the Tremec T-56 6-speed manual transmission, including filter service if applicable.

Warnings

Tools required

Parts

• Transmission drain plug crush washer (if equipped) × 1 — Use OEM specification
• Transmission fill plug crush washer (if equipped) × 1 — Use OEM specification

Fluids

• Pennzoil Synchromesh 75W-90 — 4.2 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow transmission to cool if vehicle was recently driven (minimum 30 minutes)
3. Raise vehicle on lift or support securely on jack stands at all four corners, ensuring vehicle is level
4. Verify vehicle stability before working underneath
5. Gather all tools and new fluid before beginning drain procedure

Procedure

1. 1

   Locate transmission drain and fill plugs
   From underneath the vehicle, identify the transmission drain plug on the bottom of the transmission case and the fill plug on the driver's side of the transmission case. Verify the drain and fill plug drive size against the factory service manual before selecting a tool; confirm whether they use a hex (Allen), square, or other head type. Clean the area around both plugs with a wire brush to prevent contamination when removing plugs.
2. 2

   Loosen fill plug first
   Using a 10mm hex socket, loosen the fill plug approximately 1-2 turns but do not remove it yet. This ensures you can refill the transmission after draining. If the fill plug is seized or cannot be loosened, do not proceed with draining until the issue is resolved.
3. 3

   Position drain pan and remove drain plug
   Position the drain pan directly beneath the transmission drain plug. Using a 10mm hex socket, carefully remove the drain plug. Be prepared for fluid to flow immediately. Allow fluid to drain completely until flow stops (typically 5-10 minutes). Inspect the drain plug and washer for damage.
   ⚠Fluid may be warm and will flow quickly initially. Keep hands clear of the fluid stream.
4. 4

   Inspect and prepare drain plug
   Once fluid has fully drained, inspect the drain plug threads and sealing surface. If equipped with a crush washer, replace it with a new washer. Clean the drain plug threads and sealing area with a shop rag. Inspect the drain plug hole threads in the transmission case for damage.
5. 5

   Reinstall drain plug
   Install the drain plug with new crush washer (if equipped) into the transmission case. Thread by hand initially to prevent cross-threading. Using a torque wrench and 10mm hex socket, tighten the drain plug to specification in the torqueRefs.
   Torque spec

   Drain Plug34 Nm (25 lb-ft)
6. 6

   Remove fill plug and prepare for filling
   Fully remove the fill plug that was loosened in step 2. Inspect the fill plug and its washer (if equipped) for damage. If equipped with a crush washer, replace with a new washer. Clean the fill plug and surrounding area.
7. 7

   Fill transmission with new fluid
   Using a fluid transfer pump or funnel with extension hose inserted into the fill hole, add the OEM-specified transmission fluid in the quantity given in the factory service manual. Verify the correct fluid type, specification, and fill capacity for the TR-6060 transmission before filling. Fill slowly to prevent overfilling and allow air to escape. Fluid level is correct when it begins to weep out of the fill hole. Vehicle must be level during this operation.
8. 8

   Reinstall fill plug
   Once fluid reaches the bottom of the fill hole and begins to weep out, install the fill plug with new crush washer (if equipped). Tighten to the transmission fill plug torque specification (not the drain plug spec). Thread by hand initially, then tighten to specification using a torque wrench and 10mm hex socket.
   Torque spec

   Drain Plug34 Nm (25 lb-ft)
9. 9

   Clean work area and inspect for leaks
   Wipe down the transmission case around both drain and fill plugs to remove any spilled fluid. Inspect both plugs visually for proper seating. Clean any fluid spills from the undercarriage to allow leak detection later.

Reassembly

1. Lower vehicle from lift or jack stands
2. Dispose of used transmission fluid at an appropriate recycling facility; do not pour down drains or onto ground

Verification

• Start engine and allow to idle for 1-2 minutes
• With engine running and transmission in neutral, depress clutch and shift through all gears slowly, pausing 2-3 seconds in each gear
• Return to neutral and shut off engine
• Raise vehicle and inspect drain and fill plugs for any signs of leakage
• Test drive vehicle through all gears to verify smooth shifting and proper transmission operation
• After test drive, perform final inspection of drain and fill plugs for leaks with vehicle on level ground

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