Reverse Lockout No Longer Works! Ideas?
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,033
Likes: 0
From: H-Town Texas
Reverse Lockout No Longer Works! Ideas?
Just like the title says...reverse lockout doesn't work anymore and won't stop me from shifting into reverse while driving (easy to do when shifting from 4-5). I was hoping someone could point me in the direction of a possible fix?
Thanks
Thanks
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
Has there been any recent work done on the car? The plug for the solenoid may not have been pushed on far enough to engage the lock tab. The solenoid might be bad as well.
Pro
Joined: Oct 2002
Posts: 586
Likes: 0
From: Idabel OK
You may be able to "push through it", but I don't recommend it. I am in the process of reinstalling a trans right now and one of the biggest issues was the reverse.
What started out as likely just the solenoid, ended up in no reverse at all and a marred up shifter.
Good luck
What started out as likely just the solenoid, ended up in no reverse at all and a marred up shifter.
Good luck
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,033
Likes: 0
From: H-Town Texas
You may be able to "push through it", but I don't recommend it. I am in the process of reinstalling a trans right now and one of the biggest issues was the reverse.
What started out as likely just the solenoid, ended up in no reverse at all and a marred up shifter.
Good luck
What started out as likely just the solenoid, ended up in no reverse at all and a marred up shifter.
Good luck
From the looks of it this isn't going to be an easy fix
Advanced
Joined: Jun 2009
Posts: 64
Likes: 0
From: Portage Indiana
I had the exact same issue on my Z06 CE. Gets very nerve wracking to drive doesn't it!! The fix is to change the solenoid that is located on top of the transmission. The part list price is $166.00, I ended up giving $106.00 for it at the local Chebby Dealer. The FSM calls for the rear section to be dropped a few inches to gain access. I was able to change the solenoid in about 10 minutes on my lift. I'm tall with long arms which helped. You won't get it reaching up from a laying position on jack stands!! Good luck... and happy shifting 
Also, the lockout will set a code in the DIC but won't generate a CEL. An open or shorted coil should both generate the code. Mine did NOT set a code. Obviously there was some mechanical reason in the assembly for the problem. Some day with more time I'll take it apart...
Also, the lockout will set a code in the DIC but won't generate a CEL. An open or shorted coil should both generate the code. Mine did NOT set a code. Obviously there was some mechanical reason in the assembly for the problem. Some day with more time I'll take it apart...
Last edited by BigJimZ16; Oct 13, 2009 at 02:45 PM. Reason: after thought
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,033
Likes: 0
From: H-Town Texas
I had the exact same issue on my Z06 CE. Gets very nerve wracking to drive doesn't it!! The fix is to change the solenoid that is located on top of the transmission. The part list price is $166.00, I ended up giving $106.00 for it at the local Chebby Dealer. The FSM calls for the rear section to be dropped a few inches to gain access. I was able to change the solenoid in about 10 minutes on my lift. I'm tall with long arms which helped. You won't get it reaching up from a laying position on jack stands!! Good luck... and happy shifting
Also, the lockout will set a code in the DIC but won't generate a CEL. An open or shorted coil should both generate the code. Mine did NOT set a code. Obviously there was some mechanical reason in the assembly for the problem. Some day with more time I'll take it apart...
Also, the lockout will set a code in the DIC but won't generate a CEL. An open or shorted coil should both generate the code. Mine did NOT set a code. Obviously there was some mechanical reason in the assembly for the problem. Some day with more time I'll take it apart...
Advanced
Joined: Jun 2009
Posts: 64
Likes: 0
From: Portage Indiana
I used a 1/4" drive ratchet, 13mm socket (I think); I put my right cheek right up against the bottom of the diff. facing forward, I was able to feel the plug and the single blot that attachs the lockout assy. If you have Popeye arms you're screwed... I din't have to lower the rear section at all. By the way, if you have the FSM, it only deals with the electrical part of the lockout assembly. That requires alot more room. Take my advice and change the whole assembly. That's the way GM sell it anyway. My guess is that your failure is the same as mine and it's in the assembly where the solenoid action moves through a right angle. Take your time and keep the new assembly clean. Make sure the o-ring is lubed with a drop of oil.
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Melting Slicks
Joined: Oct 2007
Posts: 2,383
Likes: 13
From: Kinston North Carolina
You're getting some good info here, but it wouldn't hurt to do a little troubleshooting first. What would you say if you changed it, and later found it was just a fuse?
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What would you say if you changed it, and later found it was just a fuse?------------------------------------------------------
Melting Slicks
Joined: Oct 2007
Posts: 2,798
Likes: 8
From: It's true money can't buy happiness, but it is more comfortable crying in a Corvette than on a bicyc
St. Jude Donor '13
In my case I over looked the wiring for that connector when I did the clutch. Pulled both wires out of the connector. I was able to get under the car on stands and bear hug the tranny. I found the problem and I took the pins out of the connector and soldered the wires back and put it all back together. Works fine. Had a code, hard to shift into reverse, would go into reverse while hunting 5th, but no message or cel. In any event do a little investigating before swapping parts.
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
All the lockout does is place a spring loaded mechanism in place so it is hard to shift into reverse. The mechanism is designed to be overridden in case of a failure that leaves the lockout in place when the car is stopped. That way the car can be moved if required. Anybody can override their lockout if they use enough force to push past the spring.
Bill
Bill
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,033
Likes: 0
From: H-Town Texas
Thanks for the info guys...I will check the fuse first and then if that's not it I will check that solenoid when I can get up to my garage in Tulsa (currently at OU).
I am hoping it's just a fuse, but honestly I doubt it...Just curious, but if I somehow pushed past that spring am I screwed?
I am hoping it's just a fuse, but honestly I doubt it...Just curious, but if I somehow pushed past that spring am I screwed?
Advanced
Joined: Jun 2009
Posts: 64
Likes: 0
From: Portage Indiana
Thanks for the info guys...I will check the fuse first and then if that's not it I will check that solenoid when I can get up to my garage in Tulsa (currently at OU).
I am hoping it's just a fuse, but honestly I doubt it...Just curious, but if I somehow pushed past that spring am I screwed?
I am hoping it's just a fuse, but honestly I doubt it...Just curious, but if I somehow pushed past that spring am I screwed?
The GM part # you want is 19133262.
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,033
Likes: 0
From: H-Town Texas
I appreciate the part number and hopefully this will fix the problem.
Advanced
Joined: Apr 2008
Posts: 54
Likes: 0
From: San Jose CA
I think I just had this problem last night but didn't catch it in time. I am at a loss now, cause I don't know if it means I need a whole new trans or if they can fix mine. I must of pushed through and grinded it while trying to shift into 5th. I don't have a reverse now. back up lights come on but the car doesn't move but just grinds
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
In my case I over looked the wiring for that connector when I did the clutch. Pulled both wires out of the connector. I was able to get under the car on stands and bear hug the tranny. I found the problem and I took the pins out of the connector and soldered the wires back and put it all back together. Works fine. Had a code, hard to shift into reverse, would go into reverse while hunting 5th, but no message or cel. In any event do a little investigating before swapping parts.
I did this too lol
Melting Slicks
Joined: Feb 2003
Posts: 2,966
Likes: 22
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11
