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2005 chevy: 1500 pickup..that has engine lite comming..Trans

Customer Question

2005 chevy 1500 pickup that has engine lite comming on pretty often coe is PO894 Trans. Slipping Fluid full no burnt smell Will shift very hard until i shutt it off for a few minutes
Submitted: 5 years ago.
Category: Chevy
Expert:  Mike S. replied 5 years ago.

I found a few tsb's on code PO894.

#08-07-30-008B: Diagnostic Information on Diagnostic

Trouble Code (DTC) P0894 and P1870 - (Jun 3, 2008)

This bulletin is being revised to remove the 2002 model year. Please discard Corporate

Bulletin Number 08-07-30-008A (Section 07 -- Transmission/Transaxle).

Diagnostic trouble codes (DTC) P0894 and P1870, Transmission Component Slipping, may have

different root causes. The following diagnostic tips are provided to assist in accurately repairing the

condition.

When attempting to diagnose a DTC P0894 or P1870, it is important to also refer to the appropriate

Service Information (SI) document for further possible causes of this condition.

Subject: Diagnostic Information on Diagnostic Trouble Code (DTC)

P0894 and P1870

Models: 2003-2007 GM Passenger Cars and Light Duty Trucks

2003-2007 HUMMER H2

2006-2007 HUMMER H3

2005-2007 Saab 9-7X

with 4L60-E, 4L65-E or 4L70-E Automatic Transmission (RPOs M30, M32 or

M70)

  • Corporate Bulletin Number 06-07-30-007 is intended for 2006 vehicles only. This bulletin

provides diagnostic procedures to determine if the TCC enable solenoid is cracked.

  • Slip speeds ranging from approximately 100 to 400 RPM at steady state light load driving are

usually caused by the TCC not applying.

  • Slip speeds greater than about 400 RPM at steady state driving are usually caused by a slipping

clutch or band. Inspect the oil pan for the presence of excess clutch debris.

  • A plugged or restricted TCC apply fluid orifice (238, located in the pump) may cause DTC P0894

or P1870, especially in low mileage vehicles with less than 8,000 km (5,000 mi).

  • A converter clutch valve (224, located in the pump), which does not have full travel of 13 mm

(0.5 in) or is stuck in the off position may cause DTC P0894 or P1870. Inspect the valve for

chips, debris, nicks or burrs. Also, inspect the springs (225 and 226) to make sure they are not

limiting valve travel. A spring that is not fully wound may catch in the bore, limit valve travel

and cause DTC P0894 or P1870.

  • A cut, damaged or missing turbine shaft O-ring seal (615) may cause these DTCs. When

installing this O-ring to the turbine shaft, make sure it is fully seated on the groove all the way

around the turbine shaft and can be easily rotated with the thumb and forefinger. Failure to

fully seat this O-ring may result in cutting when the torque converter is installed.

  • A cracked or leaking TCC solenoid (part of harness 66) may cause DTC P0894 or P1870. Use

solenoid test kit J 44246 to test the operation of this solenoid.

  • A cracked or leaking TCC PWM solenoid (396) may also cause DTC P0894 or P1870.
  • If the vehicle has 24,000 miles (38,600 km) or more, and diagnostics have not determined

another cause of the DTC, the torque converter should be replaced.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may

occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools,

safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that

your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

 

 

#08-07-30-001: 4L80E, MT1 and 4L85E, MN8

Simplified Valve Body Reconditioning Instructions,

DTC P0741, P0742, P0751, P0752, P0756, P0757,

P0894, Harsh or Delayed Shifts, Slips, No Drive, No

Reverse - (Jan 16, 2008)

 

This bulletin is designed to provide easy to follow valve body reconditioning instructions and new

illustrations to simplify reassembly of the valve body, and list other service information

documents that are related to the 4L80X transmission family.

Related Service Document

 

PIP3427A - SES light on, DTC P0757, harsh shifts, delayed 2-3 shift, no third gear or slip in third

or reverse, or a 2-3 shift flare. Debris stuck in the #11 check ball, or a sticking pintle in the 2-3

shift solenoid.

Inspection Procedure

Subject: 4L80E, MT1 and 4L85E, MN8 Simplified Valve Body

Reconditioning Instructions, DTC P0741, P0742, P0751,

P0752, P0756, P0757, P0894, Harsh or Delayed Shifts,

Slips, No Drive, No Reverse

Models: 1997-2000 Chevrolet Silverado

1997-2002 Chevrolet Silverado Chassis Cab

1997-2003 Chevrolet Express

1997-2006 Chevrolet Suburban

1997-2008 Chevrolet Express Panel, Cutaway Vans

2001-2006 Chevrolet Silverado 2500 HD, Silverado 3500 HD

2002-2006 Chevrolet Avalanche

2004-2006 Chevrolet Express 2500 HD, Express 3500 HD

2004-2008 Chevrolet W3500/4500 Series Medium Duty Tilt Cab Models

1997-2003 GMC Savana

1997-2008 GMC Savana Panel, Cutaway Vans

2001-2002 GMC Classic Sierra 3500 HD Chassis Cab

2001-2006 GMC Sierra 2500 HD, Sierra 3500 HD

2001-2007 GMC Yukon XL

2002 GMC Sierra Chassis Cab

2004-2006 GMC Savana 2500 HD, Savana 3500 HD

2004-2008 GMC W3500/4500 Series Medium Duty Tilt Cab Models

2006 GMC Yukon Denali XL

2007 GMC Savana, Savana HD, Sierra Classic HD

2001-2002 Workhorse Chassis

with Hydra-Matic® 4L80-E or 4L85-E (RPO'S MT1, MN8)

 

1. Using the exploded view (Illus. A), inspect each bore for freedom of valve(s) movement

and evidence of debris. Pay particular attention to those valves related to the customer's

concern. IF VALVE BODY CLEANING IS NOT REQUIRED, DO NOT DISASSEMBLE BORES

UNLESS IT IS NECESSARY TO VERIFY MOVEMENT OF VALVES.

 

2. Verify movement of the valves in their normal installed position. Valves may become

restricted during removal or installation. This is normal due to small tolerances between

the valves and bores.

3. If a valve is restricted and cannot be corrected by cleaning the valve and bore, then

replace the valve body. Describe the restricted valve on the repair order.

Disassembly/Reassembly

 

1. If a valve is restricted by a metal burr from machining that bore, remove the valve and

burr, then inspect movement in the valve's normal position. If no other debris or

restrictions are found, then reassemble the valve body and install in the transmission.

2. If the valve body has been contaminated with debris from another transmission

component failure, then disassemble all bores for complete cleaning of all valve body

components. Keeping individual bore parts separated will make reassembly easier. Use the

following illustrations for positive identification and location of individual parts.

3. Using GM Brake Clean, or equivalent, in a safe and clean environment (clean aluminum

pan), clean the valve body and dry it with compressed air. Use appropriate eye protection.

4. Clean individual valve body components with GM Brake Clean, or equivalent. Coat each

valve with clean ATF and reassemble in each bore. Check each valve for free movement

during assembly of each bore.

Important: Position the valve body as shown in the following illustrations for positive

identification and location of individual parts.

Left Side Control Valve Body Assembly

Call Out Number Description

 

301 Body, Control Valve

302 Filter, Pressure Control Solenoid Valve Fluid

303 Pin, Shift Valve, Fluid Filter Bore Plug

304 Seat, Low-Reverse Ball Valve

305 Valve, Low-Reverse Ball

307 Seal, 3rd Ball Valve Bushing

308 Valve, 3-4 Shift

309 Spring, 3-4 Shift Valve

310 Bolt, Solenoid (1-2 and 2-3 Shift Valve)

311 Valve Assembly, 2-3 Shift Solenoid

312 Valve, 2-3 Shift

313 Valve Assembly, 1-2 Shift Solenoid

314 Valve, 1-2 Shift

315 Spring, 1-2 Shift Valve

316 Plug, Shift Valve Fluid Filter Bore

317 Filter, Shift Solenoid Valve Fluid

318 Pin, Low-Reverse Ball Valve Seat

334 Bushing, Reverse Ball Valve

335 Bushing, 3rd Ball Valve

Right Side Control Valve Body Assembly

Call Out Number Description

 

301 Body, Control Valve

303 Pin, Accumulator Valve Bore Plug, Shift Valve

310 Bolt, Pressure Control Solenoid Clamp

Control Valve Body Spring and Bore Plug Chart (Metric)

 

319 Valve, Manual

320 Valve Assembly, Pressure Control Solenoid

321 Clamp, Pressure Control Solenoid

322 Retainer, TCC PWM Solenoid Valve

323 Valve Assembly, TCC PWM Solenoid

324 Valve, TCC Regulator Apply

325 Spring, TCC Regulator Apply Valve

327 Spring, Actuator Feed Limit Valve

328 Valve, Actuator Feed Limit

329 Plug, Accumulator Valve Bore

330 Spring, Accumulator Valve

331 Valve, Accumulator

333 Retainer, Actuator Feed Limit Valve Spring

Control Valve Body Spring and Bore Chart (Inch)

 

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that

may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the

equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin

applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the

information.

 

#07-07-30-024: Information on 4L60-E M30 Rear

Wheel Drive Automatic Transmission Valve Body

Reconditioning, DTC P0741, P0756, P0894, Harsh 1-2

Shift - (Sep 27, 2007)

The following new service information outlined in this bulletin will aid technicians in providing

easy to follow valve body reconditioning instructions and new illustrations to simplify reassembly

of the valve body. This service bulletin will also provide additional service information documents

that are related to the 4L60-E transmission.

Related Service Documents

Subject: Information on 4L60-E M30 Rear Wheel Drive Automatic

Transmission Valve Body Reconditioning, DTC P0741,

P0756, P0894, Harsh 1-2 Shift

Models: 2004-2007 Buick Rainier

2002-2005 Cadillac Escalade

1997-2002 Chevrolet Camaro

1997-2003 Chevrolet Corvette, S-10

1997-2005 Chevrolet Astro

1997-2005 Chevrolet Blazer

1997-2007 Chevrolet Express, Silverado Classic, Silverado, Suburban,

Tahoe

2002-2007 Chevrolet Avalanche, TrailBlazer, TrailBlazer EXT

2004-2007 Chevrolet Colorado

2004 Chevrolet SSR

1997-2003 GMC Jimmy, Sonoma

1997-2005 GMC Safari

1997-2007 GMC Savana, Sierra Classic, Sierra, Yukon

2001-2007 GMC Envoy, Envoy XL, Envoy XUV, Envoy Denali, Envoy XL

Denali, Yukon XL, Yukon Denali, Yukon XL Denali

2004-2007 GMC Canyon

1997-2004 Oldsmobile Bravada

1997-2002 Pontiac Firebird

2004 Pontiac GTO

2006-2007 HUMMER H3

2005-2007 Saab 9-7X

with Hydra-Matic® 4L60-E Automatic Transmission (RPO M30)

  • DTC P0741 - Torque Converter Clutch (TCC) System - Stuck Off. Refer to Service Bulletin

04-07-30-041.

  • DTC P0756 - 2-3 Shift Solenoid Valve Performance - No First or Second Gear. Refer to

Service Bulletin 01-07-30-036F.

  • DTC P0894 - Transmission Component Slipping. Refer to Service Bulletin 06-07-30-007.

Important: If valve body cleaning is not required, Do Not disassemble the bores unless it is

necessary to verify movement of valves.

Inspection Procedure

1. Using the exploded views in this bulletin, inspect each bore for freedom of valve(s)

movement and evidence of debris. Pay particular attention to those valves related to the

customer's concern.

2. Verify movement of the valves in their normal installed position. Valves may become

restricted during removal or installation. This is normal due to small tolerances between

the valves and bores.

3. If a valve is restricted and cannot be corrected by cleaning the valve and bore, then

replace the valve body. Describe the restricted valve on the repair order.

Valve Body Spring and Bore Plug Chart (Metric)

  • Harsh 1-2 Shift. Refer to Bulletin PIP3170E.

Valve Body Spring and Bore Plug Chart (Inch)

Left Side Control Valve Body Assembly

Call Out Number Description

350 Valve Assembly, Control Body

354 Piston, Forward Accumulator

355 Pin, Forward Accumulator

356 Spring, Forward Accumulator

357 Valve, Forward Abuse

358 Spring, Forward Abuse Valve

359 Plug, Bore

360 Pin, Coiled Spring

361 Valve, Low Over Run

362 Spring, Low Over Run Valve

363 Cover, Forward Accumulator

364 Bolt, Forward Accumulator Cover

365 Spring, 1-2 Shift Valve

366 Valve, 1-2 Shift

367 A Shift Solenoid A (1-2 / 3-4)

367 B Shift Solenoid B (2-3)

368 Valve, 2-3 Shift

369 Valve, 2-3 Shuttle

370 Spring, Accumulator Valve

371 Valve, Accumulator

372 Sleeve, Accumulator Valve

374 Valve, Accumulator Feed Limit

375 Spring, Accumulator Feed Limit Valve

376 Plug, Bore

377 Pressure Control Solenoid

378 Retainer, Pressure Control Solenoid

387 Valve, Reverse Abuse

395 Retainer, Bore Plug

Right Side Control Valve Body Assembly

Call Out Number Description

340 Valve, Manual

357 Valve, Forward Abuse

359 Plug, Bore

360 Pin, Coiled Spring

Notice: Be sure all solenoids are installed with the electrical connectors facing the non-machined

(cast) side of the valve body; otherwise the solenoids will bind against the transmission case as

the valve body bolts are tightened and damage may occur.

Disassembly/Reassembly

1. If a valve is restricted by a metal burr from machining that bore, remove the valve and

burr, then inspect movement in the valve's normal position. If no other debris or

restrictions are found, then reassemble the valve body and install in the transmission.

2. If the valve body has been contaminated with debris from another transmission

component failure, then disassemble all bores for complete cleaning of all valve body

components. If possible, keep individual bore parts separated for ease of reassembly. Use

the illustrations in this bulletin for a positive identification and location of individual parts:

3. Using GM Brake Clean, or equivalent, in a safe and clean environment (clean aluminum

pan), clean the valve body and dry it with compressed air. Use appropriate eye protection.

4. Clean individual valve body components with GM Brake Clean, or equivalent. Coat each

valve with clean ATF and reassemble in each bore. Check each valve for free movement

during assembly of each bore.

380 Valve, Regulator Apply (Model Dependent)

381 Plug, Bore

382 Spring, 4-3 Sequence Valve

383 Valve, 4-3 Sequence

384 Valve, 3-4 Relay

385 Valve, 3-4 Shift

386 Spring, 3-4 Shift Valve

387 Valve, Reverse Abuse

388 Spring, Reverse Abuse Valve

389 Valve, 3-2 Downshift

390 Spring, 3-2 Downshift Valve

391 Valve, 3-2 Control

392 Spring, 3-2 Control Valve

394 3-2 Control Solenoid

395 Retainer, Bore Plug

396 TCC PWM Solenoid

397 Spring, Regulator Apply (Model Dependent)

398 Valve, Isolator (Model Dependent

  • Left Side Control Valve Body Assembly
  • Right Side Control Valve Body Assembly
  • Control Valve Body Assembly Chart, Valve Springs and Bore Plugs

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that

may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the

equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin

applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the

information.

 

 

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