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Stone314
Stone314, warranty administration
Category: Car
Satisfied Customers: 69
Experience:  associates degree automotive technology
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Chevy: trany..first gear..the tranny sensor modules plaese let me

Resolved Question:

Hi i have a chevy silverado 2 drive 1997 my trany shifts hard and the first gear and second doesnt shift but when cold it does after it get hot has that issue the engine light is on because of that reason i was told by mechanic and said the computer was fried is the computer on the outside or inside trany and is the issue with the tranny sensor modules plaese let me know thanks
Submitted: 4 years ago.
Category: Car
Expert:  Stone314 replied 4 years ago.
Chat Conversation Started
Stone314 :

Good afternoon thank you for choosing Just Answer.com

Customer:

HI did you see the issues with my 97 chevy half ton 2 wd

Stone314 :

Yes you stated you have a check engine light on have you had it scanned for codes?

Customer:

yes it said the 3 shift modules are bad and the engine they try to turn it off but it wont so he said the computer is no good as well is the computer internal or outsid eof trany and where is it

Stone314 :

Control module is external to transmission did he give you a print out of what he found?

Customer:

Hi no he did not just over the phone what was wrong with it

Customer:

HI is anyone there

Customer:

Hello you back so the computer module is outside the tranny do you know where is at under the dash or where

Stone314 :

I am almost positive you have a 4l60e transmission is this correct?

Customer:

Hi am sure it is

Stone314 :

GM actually has a service bulletin for harsh first and 2nd gear harsh shift that requires reconditioning the valve body

Stone314 :

#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

Customer:

So can i buy these at a auto supply store and replace them is it easy and what is the dtc po741 and so on

Stone314 :
#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)










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)





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










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.










Harsh 1-2 Shift. Refer to Bulletin PIP3170E.


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)




[IMAGE][SRC][/SRC][ALT][/ALT][WIDTH]76.0233918128655[/WIDTH][HEIGHT]100[/HEIGHT][STYLE][/STYLE][/IMAGE]
Click here for detailed picture of above image.


Valve Body Spring and Bore Plug Chart (Inch)




[IMAGE][SRC][/SRC][ALT][/ALT][WIDTH]76.0233918128655[/WIDTH][HEIGHT]100[/HEIGHT][STYLE][/STYLE][/IMAGE]
Click here for detailed picture of above image.

[IMAGE][SRC][/SRC][ALT][/ALT][WIDTH]76.0233918128655[/WIDTH][HEIGHT]100[/HEIGHT][STYLE][/STYLE][/IMAGE]



























































































































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




[IMAGE][SRC][/SRC][ALT][/ALT][WIDTH]76.0233918128655[/WIDTH][HEIGHT]100[/HEIGHT][STYLE][/STYLE][/IMAGE]



































































































Call Out Number



Description



340



Valve, Manual



357



Valve, Forward Abuse



359



Plug, Bore



360



Pin, Coiled Spring



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



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. Left Side Control Valve Body Assembly










    Right Side Control Valve Body Assembly










    Control Valve Body Assembly Chart, Valve Springs and Bore Plugs


  4. 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.

  5. 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.

Customer:

Hi thats what he said the valve body where no good had to replace those and the computer because it got burnt out 1400.00 to do that can i buy a computer at gm for this tranny and is the codes hard to put in or will it do it itself once all put back together and will reset itself

Stone314 :

The check engine light will not go off until the issue is resolved with the valve body replacing the computer no

Customer:

HI so the computer has to be change for a new one and gm has them is the valve body a hard task or can be done my brother has knowledge of mechanic work

Customer:

The shop i took it to says the computer has to be changed even if the valve body is changed is that true

Customer:

hi it been a hour no response please respond

Stone314 :

If your brother is expeirenced yes it its possible only he can tell you if he is comfortable with doing this as far as the computer goes I would not change something I am not having a issue with

Customer:

Hello last Q i have about the computer can it be no good just because the light is not off they try to reset it and wont shut off but the valve body hasnt been changed once it changed it will the light shut off if you disconnect battery it will shut off also is that true thanks
































Stone314, warranty administration
Category: Car
Satisfied Customers: 69
Experience: associates degree automotive technology
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