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Transmission is detroyed?

HOPPY

HOPPY

New member
Ever since I bought my 2000 gtp about 4 months ago the trans has worked perfectly until yesterday.. I went to back in to a parking space and the car seemed to lock up and wouldn't move. I would have to gas it to get it unlocked just to roll but a bit then lock again.. when ever the car moved, forward or backward, it would make a horrible grinding noise almost sounded like plastic. So i got it into the space and i def was not going anywhere from there by itself. I had a friend who works for a gm parts dealer tow it to his house. originally he thought the rotors were worn through.. that wasn't it. we took apart the wheel assembly down to the cv shaft which was snapped so we figured that was the problem. he fixed it this morning along with new front rotors and the car does the same thing it doesn't want to move and feels like the trans is locking up. any ideas?? he believes it is the trans.

I'm sure Trannyman will be able to throw in his 2 cents. and I'll be pming you about a built transmission very soon i believe haha..

Thanks in advance.
 


Neutrals at stops, Shudders on take off: One of the most common problems I have found after the milege gets over roughly 60K miles. The scenario.... You are driving in traffic for a while OR your car has sat for a while and is a cold startup. You put the car in Drive range and it wont move, or if driving you come up to a stop light and in heavy traffic and the light turns green and SUPRISE!!! You are holding up traffic with a car that wont go anywhere. The most common cause of this problem is a worn out inner surface of the Input clutch piston. I will post pics soon so you can better understand why it IS a real problem. Once the inner sealing area wears it can prevent the inner lip seal for the piston from sealing properly. You may find that revving th engine up will finally get the car to move and it will BANG into gear. This is because the pump in the transmission is working harder and moving more fluid thus allowing the added fluid to overcome the leak which prevented the clutch from either initially applying or staying applied. Another area of concern that causes this is a boost valve in the valve body, not near as common but it can cause this problem on a lessor scale. If a fluid/filter service has not been performed in a very long time then a very dirty or plugged up filter can add to problems as it because a major restriction. IF the filter is found to be very dirty on the inside, which can be verified by cutting open the filter, then there are other problems inside the transmission anyways and an overhaul is the only correct way to fix the problem.
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4T65E Transmission Info

Could also be the diff.
 
My initial thought was a bad cv but since you later mentioned replacing them that rules them out as long as they were all checked to be ok or replaced. If your differential is coming apart that will definately cause the problems you have going on and if that checks fine then you likely have some internal geartrain damage
 
Trannyman95 said:
My initial thought was a bad cv but since you later mentioned replacing them that rules them out as long as they were all checked to be ok or replaced. If your differential is coming apart that will definately cause the problems you have going on and if that checks fine then you likely have some internal geartrain damage
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x2

My bet is... unfortunately, a issue with a drive sprocket. I once had this exact problem with my car and that is what it turned out to be.
 
the diff is the easiest thing to inspect at this point. unfortunately it sounds like this one is coming out of the car. i'm interested to hear what it is
 
Excessive gear / grinding noises while moving:
This can be a number of different things but is commonly the input carrier and sun gear which sits inside it. I have found this problem to be worse in the 1999-2001 models and can happen for no reason even on a low mileage transmission. It will start as a grinding noise that changes sound with speed and turns into crunching noises and finally loss of gears and all movement depending how far it goes. A lot of fine hard bits of metal will likely be in the pan or filter and a complete overhaul is the only remidy for this. Another cause of this noise can be a differential failing. The planet gears on the differential that sit inside the internal ring gear in the tail of the transmission can become very pitted and chip under high mileage and excessive stress and this can also happen if any debris is in the trans and travels through the cooler and back into the geartrain. Sometimes replacement of the differential can cure this, but normally the internal ring gear is damaged as well which requires complete overhaul.



That is what i thought it was after reading it on triple edge performance but luckily i got a call with some good news the other day the abs wasn't reconnected so everything seems fine now. I have noticed alittle noise after the new parts were installed nothing to scary though. BTW I had the drive shaft/cv joint, front rotors and pads replaced for $160. lets hope the trans and differential are fine
 


Getting a whining/howling noise now which gets high pitched with higher rpms now... now it sounds like i may be needing a new trans after all....
 
The noise actually goes away when i am off the gas.. it seems like it has to be something with the diff. or trans? idk

but when rev'd in neutral i don't get the noise
 


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