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My car won't go into gear at all. The fluid was low, so I added some but still no gears. Put the car in the air, and the tires want to spin forward in drive, park, and reverse. No transmission codes on the dic. Pressure control selonoid ? Time to replace the transmission?

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The electronic connector going into the transmission is a large pigtail type connector. Might be a waste of time, but perhaps disconnecting it and reconnecting it -- with the engine off and the battery disconnected -- would ensure the issue is not just a miscommunication issue.


Bruce

2016 Cadillac ATS-V gray/black; 2013 Cadillac ATS 2L Turbo Premium (Wife's)

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Any buzzing or hydraulic noise? What does the fluid smell like? How much fluid did you need to add?

Explain no codes on the DIC?, did you extract the codes using the on board diagnostic system? They won't come up on their own


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Yeah I used the dic to read the codes. The fluid is still red with a good smell, my buddy actually added the fluid so let me check. Can you describe the noises I should check for? I'll give it a good listen

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Your initial problem description is confusing. Are you stating that no matter what position the gear selector is in, the car wants to move forward?


Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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The noise is sort of the noise a power steering unit makes when it low in fluid, a whining

WHen the car was in the air the wheels moved?

Do you feel an initial engagement when you move from N to DRIVE OR REV, sort of a bump?

Does it feel like its slipping?


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Your initial problem description is confusing. Are you stating that no matter what position the gear selector is in, the car wants to move forward?

thats exactly what is happening. It won't move when the car is on the ground so it must be slipping, but when its in the air, the front wheels are clearly spinning forward no matter what the shift selector is on. Park/reverse/drive all moved the wheels forward.

As far as feeling a bump when I first shifted, I want so say that I did feel a bump on the first shift, but I'll have to go try again to be sure.

Edited by Eyik66

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It sounds like the shifter cable is misadjusted but that would set a trouble code. I would need to study the shop manual to see what is going on but off hand, if the shift solenoids are stuck in 1st gear, that might cause the problem but again, that would set a code and shift solenoids are not usually an issue on the 2000+ cars.


Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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The only no-code cause that I can think of is bad transmission wiring connections. I believe Park includes a mechanical connection to the locking pawl (probably through a cable; others may chip in to correct me on this) but everything else is an electrical connection to the PCM. Look at the big connector under the car from the wiring harness to the transmission, and the wires to the transmission and back to the wiring harness.


CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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Do you have any OBD codes?  Run the codes and post them here.


CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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Is this with the front wheels off the ground and engine at idle?  When the wheels are on the ground and you give it a bit of throttle in Reverse, does the car move forward?   Does the car surge against the Park pawl when you give it a bit of throttle in Park?

This is the FSM entry for "Forward motion in N:

Checks

Causes

DEFINITION: Forward Motion in Neutral

Forward Clutch Housing

Feed hole plugged, inspect tower

Forward Clutch Piston

Jammed

Forward Clutch Plates

Seized or jammed

Forward Clutch Springs

Jammed

Forward/Coast Clutch Support Hub

Holes plugged

Manual Valve

Mispositioned or stuck

Shift Linkage

    •  Mispositioned
    •  Disconnected

The only do-it-in-the-driveway DIY check that is listed is to check the shift linkage.  The FSM drawing of the cable attachment to the transmission:

showGif.png

1 - where the cable attaches to the transmission.  This may be disconnected in your case.

2 - cable holder, with adjustment.  The FSM adjustment process follows.

Range Selector Lever Cable Adjustment

Notice: Adjust the shift control cable only while the transaxle and the gear selector are in NEUTRAL. Failure to do so may cause mis-adjustment.


Object Number: 97542  Size: SH

 

  1. Set the parking brake and chock the wheels.
  2. Remove the shift cable terminal from the transmission manual shaft lever pin.
  3. Pry on the shift cable terminal at the manual shaft lever pin with an appropriate tool. Prying or pulling up on any other part of the shift cable may result in damage to the shift cable .

  4. Fully lift the adjuster lock button. Ensure that the adjuster is free to move.
  5. Place the transmission manual shaft lever in (N) Neutral. In order to find (N) Neutral, rotate the lever fully counterclockwise to (P) Park, and then clockwise 2 clicks into (N) Neutral.
  6. Place the gear shifter inside the car to the (N) Neutral position. Use the transmission shift indicator on the console to find (N) Neutral.
  7. From under the hood, grasp the shift cable terminal and pull it toward the pin on the manual shaft lever. The shift cable adjuster spring should compress as the terminal is moved toward the pin.
  8. Attach the pin to the lever by pushing down carefully until it snaps.

Do not pull the terminal beyond the pin and then push back. This action could move the shifter out of (N) Neutral.


Object Number: 97544  Size: SH

  1. Press the adjuster lock button down flush with the adjuster body.
  2. Shift to (P) Park and release the parking brake while applying the service brake.
  3. Start the engine and assure all of the indicated gear positions match the vehicle response.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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21 hours ago, Dan03deville said:

I have discovered the shift valve and shifted the car by hand on the transmission and it still drives in all gears except park. Could this be the forward clutch being stuck? How can I check or fix this? 

Does the shift lever drive the shift valve in the proper position as shown in the shift indicator?  The two missing pictures labeled Object Number 97542/97544 are below:

showGif_01.pngshowGif_02.png

Checking the other parts requires removal and disassembly of the transmission.  If the external adjustments, fresh Dexron VI, etc. don't work for you then I would suggest that you commit to a transmission exchange or overhaul.  If you do internal automatic transmission work yourself, perhaps someone else can step up here.  I do suggest that you be prepared for clean, well lighted indoor workspace with a complete factory overhaul manual for the 4T80E before you start.


CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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Are you saying that in neutral, it acts like it is in drive?

What does it do in reverse?


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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