08 Burb won’t move
08 Burb won’t move Helping a buddy out and before we pull the tranny I wanted to run it by the experts. Suburban ran fine, wife parked it and got in the next day and it won’t move at all, to the point of pulling the driveshaft to get it on the trailer because it wouldn’t roll when put in neutral. You can start it and run it thru the gears and the motor acts normal when put in gear but no output shaft movement at all. I can give it gas in gear but nothing happens and then it won’t come out of drive unless I turn it off. Just trying to rule everything out before pulling the tranny.
Moderator
Joined: Aug 2010
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From: Ann Arbor, MI
I don't understand what you mean by "it won’t come out of drive unless I turn it off". Other than that, it almost sounds like the shifter is not working. I don't recall a single other post here where the trans acted like it was in Park.
Assuming the shifter is fine, I would first drop the pan and confirm that the internal mechanism for disengaging Park is working.
Assuming the shifter is fine, I would first drop the pan and confirm that the internal mechanism for disengaging Park is working.
I can’t shift it out of drive at all unless I shut it off. I’ll get someone to run the shifter while I’m under it. I feel the detents as I run the shifter and here the motor unload when I put in neutral.
https://www.youtube.com/watch?v=HeZL...ature=youtu.be
This is with the shift linkage disconnected and running it by hand all the way down and back to park. I’m not sure if the brake switch or column has any effect on the transmission engaging.
This is with the shift linkage disconnected and running it by hand all the way down and back to park. I’m not sure if the brake switch or column has any effect on the transmission engaging.
TECH Junkie
Joined: May 2012
Posts: 3,050
Likes: 716
From: Poplarville, MS
Yes, it’s a simple design. Two rods are hooked to the rooster cone. The small rod is hooked the manual valve in the valve body and the larger rod goes toward the rear of the trans and operates the parking paw. Either one of these rods coming loose could cause a problem, but with not being able to move the vehicle when not in park I suspect something is wrong with the parking linkage.
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I pulled the pan and manually ran the linkage but didn’t have good enough light to see the pawl side of things. I’ve got to get a good flashlight and hopefully I don’t have to drop the valve body. I don’t want to chance losing any checkballs.
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Verdad Gallardo Well it looks like the little beveled piece that pushes on the pawl is hanging on the pawl not letting it drop. I pulled that linkage out but I don’t have anything to compare it to. The spring doesn’t look broke, beveled piece slides fine back and forth until it’s close to coming off and it hangs up. I’m not sure if the end of the shaft should have a shoulder or not.
Yes and yes, well the beveled piece almost slides off the rod but hangs up close to the end. I mushroomed the end of the rod and stuck it back in and it seems to be working correctly. Output locks when you put it in park and unlocks in gear. Buddy wants to find a new parking rod, so I’m hunting for one.