Anyone have these problems after 4l80e swap?
10-06-2007, 12:43 AM
#1
11 Second Club
Thread Starter
iTrader: (47)
Join Date: Feb 2003
Location: Kansas City, Mo
Posts: 3,937
Likes: 0
Received 0 Likes
on
0 Posts
Anyone have these problems after 4l80e swap? I got my PCM done by hp tuners finally. Car drives and shifts great most of the time lol. That leads me to some issues.
-The first one is sometimes the car will shift very smooth and quick and other times it will take a while to shift and shift hard....Is this in the tune or something else? I was pulling a MAF circuit code and throttle position sensor code when the transmission started shifting hard. Problem is im supposed to have a SD tune on my car. Thats that problem...not bad.
-The second is having me scratch my head. When I put the car into drive while stopped it feels like my transmission crossmember is loose and it vibrates. Not a bad vibration but its noticable and I can hear it, just sounds like something is loose but ive checked everything. It also seems like when I turn it does it as well. I have poly mounts on both motor and transmission and my y-pipe isnt even close to touching but thats exactly what it feels like. Did anyone else have these problems after the swap?
-The first one is sometimes the car will shift very smooth and quick and other times it will take a while to shift and shift hard....Is this in the tune or something else? I was pulling a MAF circuit code and throttle position sensor code when the transmission started shifting hard. Problem is im supposed to have a SD tune on my car. Thats that problem...not bad.
-The second is having me scratch my head. When I put the car into drive while stopped it feels like my transmission crossmember is loose and it vibrates. Not a bad vibration but its noticable and I can hear it, just sounds like something is loose but ive checked everything. It also seems like when I turn it does it as well. I have poly mounts on both motor and transmission and my y-pipe isnt even close to touching but thats exactly what it feels like. Did anyone else have these problems after the swap?
10-06-2007, 07:34 AM
#2
I would look into the MAP and TPS codes as they will definitely effect the way a trans shifts. As far as your vibration poly mounts create a lot of this. It is possible that your trans is rubbing in the tunnel area somewhere. Maybe try to change the mounts and see if it corrects the vibration for you.
10-06-2007, 08:33 AM
#3
11 Second Club
Thread Starter
iTrader: (47)
Join Date: Feb 2003
Location: Kansas City, Mo
Posts: 3,937
Likes: 0
Received 0 Likes
on
0 Posts
I would look into the MAP and TPS codes as they will definitely effect the way a trans shifts. As far as your vibration poly mounts create a lot of this. It is possible that your trans is rubbing in the tunnel area somewhere. Maybe try to change the mounts and see if it corrects the vibration for you.
Trending Topics
10-11-2007, 01:48 PM
#13
11 Second Club
Thread Starter
iTrader: (47)
Join Date: Feb 2003
Location: Kansas City, Mo
Posts: 3,937
Likes: 0
Received 0 Likes
on
0 Posts
Found my vibrating problem, one of the primary's on my hooker headers is rubbing on my K-member. All this time ive been worried because I couldnt find my problem.
