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4L60E broken

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Old Feb 16, 2014 | 10:47 PM
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Default 4L60E broken

My 4L60E broke on my 2002 Z28 Camaro back in November.

Problem: the car well not Reverse it acts as in Neutral and in Neutral it rolls forward. I also cannot push it backwards in R or N.

Specs: 60k miles brand new Royal tranny fluid and kings filter.

I've tried messing with the linkage cable that didn't work.

My question is how can I fix it ? Do I buy another one, and how much ? Do I rebuild and how much ? I'm only 17 so once I know my solution I well start working to fix it.

Thank for the help guys
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Old Feb 16, 2014 | 11:50 PM
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Hook it to a scanner and see if there are any codes. Then try hooking up a pressure gauge to it and see if it's getting pressure...
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Old Feb 17, 2014 | 08:19 AM
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Alright thanks bro ill have to try that. But what would the program scanner do with the Transmission missing gears ?
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Old Feb 17, 2014 | 09:56 AM
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My suggestion is to find a local trans shop (not a chain) and have them check it and rebuild if necessary. You might visit an auto shop that does not do transmissions and ask them for a reference.
I would also suggest NOT trying to rebuild it yourself; it takes specialized tools and I estimate that fewer than 50% of first-time rebuilds work properly. It is extremely unlikely you would save money trying to rebuild it yourself. The members here that do it (like myself) do it for fun, education and/or personal satisfaction, not to save money.
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Old Feb 17, 2014 | 10:00 AM
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It'll tell you if you have any circuit failures in the trans
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Old Feb 17, 2014 | 10:44 AM
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Originally Posted by mrvedit
My suggestion is to find a local trans shop (not a chain) and have them check it and rebuild if necessary. You might visit an auto shop that does not do transmissions and ask them for a reference.
I would also suggest NOT trying to rebuild it yourself; it takes specialized tools and I estimate that fewer than 50% of first-time rebuilds work properly. It is extremely unlikely you would save money trying to rebuild it yourself. The members here that do it (like myself) do it for fun, education and/or personal satisfaction, not to save money.
Thanks bro but my only problem is trying to push it backwards (since it wont go in Reverse ) to be able to drive it to the shop.
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Old Feb 17, 2014 | 10:46 AM
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Originally Posted by Cole Train
It'll tell you if you have any circuit failures in the trans
Alright thanks for the idea ill have to try that this weekend
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Old Feb 17, 2014 | 11:46 AM
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Disconnect the driveshaft and pull it out of the transmission and it'll roll without issue Lift up the rear, put stands under it, pull the caps off the rear end of the driveshaft from the rear diff(where the u-joints are) and slide it towards the front of the car until it comes off the rear diff(sometimes you need to tap it the caps with a hammer) and then drop it down and slide it out.
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Old Feb 18, 2014 | 10:43 AM
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Originally Posted by Cole Train
Disconnect the driveshaft and pull it out of the transmission and it'll roll without issue Lift up the rear, put stands under it, pull the caps off the rear end of the driveshaft from the rear diff(where the u-joints are) and slide it towards the front of the car until it comes off the rear diff(sometimes you need to tap it the caps with a hammer) and then drop it down and slide it out.
What is this for ?
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Old Feb 18, 2014 | 11:03 AM
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You said you can't push it backwards. If you disconnect the driveshaft it'll move any direction you need it to.
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Old Feb 18, 2014 | 11:24 AM
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It sounds like the band anchor pin sheared off and has the reverse input drum jammed.
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Old Feb 18, 2014 | 03:05 PM
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Originally Posted by Ratdaddy60
It sounds like the band anchor pin sheared off and has the reverse input drum jammed.
That is a very reasonable hypothesis; a trans shop can easily check that with only dropping the pan; there is a small access hole to view and pry the band.
If true, you won't have 2nd or 4th gear either.
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Old Feb 21, 2014 | 10:50 AM
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Originally Posted by Ratdaddy60
It sounds like the band anchor pin sheared off and has the reverse input drum jammed.
how can i fix that ?
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Old Feb 21, 2014 | 12:22 PM
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The transmission will have to be pulled, the valve body, pump, 2-4 band, and the input clutch assemblies removed. You'll need at the minimum, a new band, hardened billet band anchor pin, and possibly a reverse clutch drum.
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Old Feb 21, 2014 | 04:36 PM
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Originally Posted by Ratdaddy60
The transmission will have to be pulled, the valve body, pump, 2-4 band, and the input clutch assemblies removed. You'll need at the minimum, a new band, hardened billet band anchor pin, and possibly a reverse clutch drum.
Exactly right. You will need a variety of gaskets too, including separator plate gaskets, the gasket between the pump and case.
If the trans has more than 100,000 miles on it, this is right time for a complete rebuild.
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Old Feb 21, 2014 | 08:55 PM
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It is my understanding that even if all the electrical is not working this trans will default to one forward and reverse gear. So I don’t think it is an electrical issue. Someone please correct me if I am wrong.
The low/reverse and reverse input clutches are applied in reverse, It is a good possibility that one these sets of clutches are worn out. Remove the trans oil pan and inspect for burnt fluid and clutch material in the bottom of the pan. Another possibility is that the sun shell is broken. All of which would require the trans to be taken apart. Sorry but it doesn’t look good.
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Old Feb 21, 2014 | 09:31 PM
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You are correct bbond105.
Even with the electrical connector disconnected, you will have reverse and 3rd gear. The trans then also goes to maximum line pressure.
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Old Feb 21, 2014 | 09:49 PM
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Most times on this forum people will suggest that you do the work yourself to save $$. Unfortunately, this is not a project you will be able to handle yourself. Take their advice and take it to a shop however you can.
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Old Feb 23, 2014 | 07:06 PM
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Here's a video I recorded this weekend of the car

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Old Feb 23, 2014 | 09:54 PM
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If you can't fix it yourself you're gonna have to just take it in... We can only diagnose so much on a forum without knowing more or being there
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