Symptoms - Automatic Transmission. GMC Truck Savana 2001

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2001 🢒 Savana 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Symptoms - Automatic Transmission

Diagnostic Category

Diagnostic Information

The following table consists of eight diagnostic categories that are located in the left-hand column. Using this column, choose the appropriate category based on the operating conditions of the vehicle or transmission. After selecting a category, use the right-hand column to locate the specific symptom diagnostic information.

Fluid Diagnosis

This category contains the following topics:

•	Fluid condition (appearance, contaminants, smell, overheating)

•	Line pressure (high or low)

•	Fluid leaks

•	Refer to Transmission Fluid Check .

•	Refer to Oil Pressure High or Low .

•	Refer to Fluid Leak Diagnosis (procedure).

•	Refer to Oil Out the Vent .

Noise and Vibration Diagnosis

This category contains the following topics:

•	Ratcheting noise

•	Noise (drive gear, final drive, whine, growl, rattle, buzz, popping)

•

Vibration

•	Refer to Ratcheting Noise .

•	Refer to Vibration in Reverse and Whining Noise in Park .

Range Performance Diagnosis

This category contains the following topics:

•	Drives in Neutral

•

No Park

•	No Reverse

•

No Drive

•	No engine braking

•	Shift selector indicator does not match transmission gear range

•	Refer to Drives in Neutral .

•	Refer to No Park .

•	Refer to No Reverse or Slips in Reverse .

•	Refer to No Drive in All Ranges .

•	Refer to No Drive in Drive Range .

•	Refer to No Overrun Braking - Manual 3-2-1 .

•	Refer to Range Selector Displays Incorrect Range .

Shift Quality (Feel) Diagnosis

This category contains the following topic:

•	Harsh, soft or slipping shifts

•	Harsh, soft or delayed engagement

•	Shift shudder, flare or tie-up

•	Refer to Harsh Shifts .

•	Refer to Slipping or Harsh 1-2 Shift .

•	Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting .

•	Refer to No 3-4 Shift, Slips or Rough 3-4 Shift .

•	Refer to Harsh Garage Shift .

•	Refer to Delay in Drive and Reverse .

•	Refer to 3-2 Flare or Tie-Up .

Shift Pattern

This category contains the following topics:

•	One forward gear only

•	Two forward gears only

•	Gear missing or slipping

•	No upshift or slipping upshift

•	No downshifts

•	Non-First gear start

•	Refer to First Gear Range Only - No Upshift .

•	Refer to Third Gear Only .

•	Refer to Second/Third Gear Only or First/Fourth Gears Only .

•	Refer to Slips in First Gear .

•	Refer to Slipping or Harsh 1-2 Shift .

•	Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting .

•	Refer to No 3-4 Shift, Slips or Rough 3-4 Shift .

•	Refer to No Part Throttle or Delayed Downshifts .

•	Refer to Second Gear Start .

Shift Speed Diagnosis

This category contains the following topic:

Inaccurate or inconsistent shift points

Refer to Inaccurate Shift Points .

Torque Converter Diagnosis

This category contains the following topics:

•	Torque converter diagnosis

•	TCC does not apply

•	TCC does not release

•	TCC apply/release quality

•	Refer to Torque Converter Diagnosis .

•	Refer to No Torque Converter Clutch Apply .

•	Refer to No Torque Converter Clutch Release .

•	Refer to Torque Converter Clutch Shudder .

If Symptom Not Found

•	Refer to Transmission Fluid Check .

•	Refer to Road Test .

•	Refer to Line Pressure Check .