4l60e diagnostic... need a starting point...
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TECH Resident
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Joined: May 2007
Posts: 814
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From: Harpers Ferry WV
4l60e diagnostic... need a starting point... Ok guys, first ill start by giving you some backround on this worthless piece of metal that currently resides between my motor and my rear end. I started with a monster 4l60e stage 2... I got bit by the beast. It lasted 500 miles and **** the bed. Monster refused to warranty me because I wasnt running there convertor (they recomended me a yank 3800 when they told me they couldnt stall me high enough with there convertors but failed to mention that little fact) I took it to a local shop and had it rebuilt with upgraded parts (by upgraded i mean stock gm because the inside of this thing was worthless) so at this point im about 3 grand into a 1200 transmission. Ive been doing pretty good since that rebuild and logged about 5000 miles on it.
Yesterday on the way to get the car re-tuned with Jeremy Formato in Gettysburg. Car was fine all morning, drove it to Fredrick for lunch. Started to head to Gettysburg and as I was pulling onto the highway at about quarter throttle the trans fell out of gear. I started pulling it through the range to see if anything would hit. Nothing. Rolled to a stop, checked fluid. Looked a little low so I put some in, still wouldnt move. Ended up having the car towed home. Still wont go into gear and I'm at a complete loss on where to start. Motors running fine, no trouble codes. Just wont go into gear.
Let me know what you guys think...
Yesterday on the way to get the car re-tuned with Jeremy Formato in Gettysburg. Car was fine all morning, drove it to Fredrick for lunch. Started to head to Gettysburg and as I was pulling onto the highway at about quarter throttle the trans fell out of gear. I started pulling it through the range to see if anything would hit. Nothing. Rolled to a stop, checked fluid. Looked a little low so I put some in, still wouldnt move. Ended up having the car towed home. Still wont go into gear and I'm at a complete loss on where to start. Motors running fine, no trouble codes. Just wont go into gear.
Let me know what you guys think...
TECH Regular
Joined: Jan 2010
Posts: 497
Likes: 4
Ok guys, first ill start by giving you some backround on this worthless piece of metal that currently resides between my motor and my rear end. I started with a monster 4l60e stage 2... I got bit by the beast. It lasted 500 miles and **** the bed. Monster refused to warranty me because I wasnt running there convertor (they recomended me a yank 3800 when they told me they couldnt stall me high enough with there convertors but failed to mention that little fact) I took it to a local shop and had it rebuilt with upgraded parts (by upgraded i mean stock gm because the inside of this thing was worthless) so at this point im about 3 grand into a 1200 transmission. Ive been doing pretty good since that rebuild and logged about 5000 miles on it.
Yesterday on the way to get the car re-tuned with Jeremy Formato in Gettysburg. Car was fine all morning, drove it to Fredrick for lunch. Started to head to Gettysburg and as I was pulling onto the highway at about quarter throttle the trans fell out of gear. I started pulling it through the range to see if anything would hit. Nothing. Rolled to a stop, checked fluid. Looked a little low so I put some in, still wouldnt move. Ended up having the car towed home. Still wont go into gear and I'm at a complete loss on where to start. Motors running fine, no trouble codes. Just wont go into gear.
Let me know what you guys think...
Yesterday on the way to get the car re-tuned with Jeremy Formato in Gettysburg. Car was fine all morning, drove it to Fredrick for lunch. Started to head to Gettysburg and as I was pulling onto the highway at about quarter throttle the trans fell out of gear. I started pulling it through the range to see if anything would hit. Nothing. Rolled to a stop, checked fluid. Looked a little low so I put some in, still wouldnt move. Ended up having the car towed home. Still wont go into gear and I'm at a complete loss on where to start. Motors running fine, no trouble codes. Just wont go into gear.
Let me know what you guys think...
BROKEN INPUT SHAFT......
Had that replaced 15k miles later second gear bands are wasted.... this is my daily driver that i was hoping for some track use but not going to happen.
Im looking to swap a TH400 into it now. IM DONE
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Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
I would first check that the converter to flexplate bolts didn't all fall out.
Else, you are going to have to pull the trans to find the problem.
A total failure like that sounds like the pump or the input or output shaft.
You could test the pump by connecting a gauge to the side port, but regardless the trans will have to come out.
I'm no expert, but I don't think any electrical/solenoid/PCM/tuning or similar problem could cause this, as in those case the trans goes into limp mode and you have only 3rd gear and reverse.
Sorry not to have better news.
Else, you are going to have to pull the trans to find the problem.
A total failure like that sounds like the pump or the input or output shaft.
You could test the pump by connecting a gauge to the side port, but regardless the trans will have to come out.
I'm no expert, but I don't think any electrical/solenoid/PCM/tuning or similar problem could cause this, as in those case the trans goes into limp mode and you have only 3rd gear and reverse.
Sorry not to have better news.
