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96 Automatic grinds and doesn't move; just grinds and park doesn't work
Topic Started: Oct 4 2012, 01:11 PM (2,920 Views)
blowinsmoke21
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so i have 96 lsi 4 cyclinder automatic transmission. I was driving today and when i came to a red light i stopped and the car kinda made a slight clunk, nothing loud or anything just happened to feel it through the floor. I didn't think anything of it, i went to take off and it didn't move. I tried to put it into park and back into drive, but when it wouldn't let me shift to park. It just grinded when about to go into park. The shifter moves everywhere (r,1,2,d) when running but wont go into park when running. I can put it into park when its shut off. When it is in park i can push the car as if it were in neutral. Please help with any advice. Thanks in advance.
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cpalz
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Kind of a long shot, but did you break a cv axle? When it grinds, while you are putting it in park, while running, you are most likely hearing the parking pawl trying to engage while the components are spining. They should not be spinning if you are not moving. They could spin if an axle was broke. Even at idle. Kinda Like having your wheels off the ground and putting it in drive, watching the wheels creep. All it takes is one axle broken, and it could creep, with an open diff. And that could be why you can push it in park. Even if one shaft is disconnected, because of the diff. I would start it and look at the axles underneath. see if part of one is turning, where it comes out of the transmission, or by the wheel. A long shot, like i said, but it could cause the symptoms you are talking about.
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cpalz
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Or if not broken, the axle might have popped out.
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blowinsmoke21
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i took both axels out. with the axels out i can still turn the part that sticks out of the differential where the axels slide into by hand. It seems that there is something inside the differential that may be broke. Any ideas?
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cpalz
Advanced Member
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Were the axles in good shape? Both were seated properly where they go into transmsssion? Got a pic of what you can turn by hand? If it is where the axles go in, that should turn, especially with no axles in it. What you would have to do is, keep one side from turning, any way you can. Then Put it in park, engine off. Then try turning the other one, the one not blocked from turning, either by hand, or with axle inserted. It should not turn if everything is working.
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blowinsmoke21
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When I had passenger side axel off with car in park and engine off I was able to turn the piece coming out of differential by hand. Driver side axel was in and driver side tire was on ground stopping driver side to turn. As I turn it by hand I can feel clicking if some sort. I don't have a picture as of now but I can take one tonight when I get home.
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cpalz
Advanced Member
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Ok. As long as axles are in good shape, and no part of the axle that is held is turning, or the splines are not destroyed, It seems like it is internal to the transmission. Remove the other axle just for fun, inspect it and the splines, and if good, Transmission is most likely the culprit. Sad Day....

As an afterthought, look at the shift cable also, to make sure all is well there, and properly engaging all gears.
Edited by cpalz, Oct 5 2012, 09:19 AM.
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blowinsmoke21
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Thanks for the fast response. I checked the linkage and and seemed well everything moved when shifting through the gears.
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blowinsmoke21
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So apparently I took the cv joint apart at the boot by the transmission. So I didn't ever have it all the way out of the differential. So I removed it all the way. I stuck my finger in the differential. And was able turn the spline inside the differential on both sides. Would turn both the same direction at same time and turn both at the same time in opposite direction. Also I could hold one side still and spin the other side. Does this give any body any other ideas or things to try?
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JABayne
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Here is what happened to me. I drove over some railroad tracks and the same thing happened. I could press on the gas but I would not go anywhere and heard some grinding going on underneath. Dragged the car home, got it up on jacks and found the sound was coming from the differential where the CV axles connected to the transmission.

I have just in the past two days finished replacing the transmission because of this. I talked to a really close mechanic friend and described the whole scenario. He said the differential gear was broke and it would be best to just rebuild or replace the transmission.

Like I said I just replaced it with a part pulled from a wrecked car (go to car-parts.com to find them) and my car will now engage into gear. At first it did not want to, but I did not have enough fluid in it, and the shifting cable needed adjustment.

I hate to say it but what you are describing sounds almost identical to what I have experienced. The way I found out for sure was to take out the axles and have the car up on jacks. Start the car and engage the transmission to drive or reverse. Look through the differential. If nothing is moving it's definetly shot.

JABayne
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92xjlaredo
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blowinsmoke21
Oct 5 2012, 05:23 PM
So apparently I took the cv joint apart at the boot by the transmission. So I didn't ever have it all the way out of the differential. So I removed it all the way. I stuck my finger in the differential. And was able turn the spline inside the differential on both sides. Would turn both the same direction at same time and turn both at the same time in opposite direction. Also I could hold one side still and spin the other side. Does this give any body any other ideas or things to try?
well taking a little of my experience from offroad adventures, if this is an open differential, which im sure they are. you should be able to hold one side and the other will spin, and if you spin one side without holding the other, the side you arent touching should spin in the opposite direction. unless im very unfamiliar with front wheel drive transmissions and drivelines.
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blowinsmoke21
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Thank you guys. And yes u are correct you should be able.to hold one side and spin the other. Mine could spin both sides opposite of each other and same way as each other. Mine was shot I just put a new transmission on Tuesday and everything is good now. Yesterday I put 150 miles on it all is good.so far. Thank you to all for your input and suggestions! This forum is really helpful.
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