Anyone ever have the drum flower out?
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Teching In
Joined: Jun 2002
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From: Houston,Tx. US
Anyone ever have the drum flower out? My 4l60e in my 94 just went out again,when I gave it gas to kick it from 4th to 2nd. I took it apart, and found everything looks good, but the forward drum flowered out and started slightly cutting into the case. Also,the sunshell is slightly flowered out. What causes just these parts to go? This is the 2nd time it has done this. 
Launching!
Joined: Jun 2004
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From: Mooresville, NC
Originally Posted by WadeC
My 4l60e in my 94 just went out again,when I gave it gas to kick it from 4th to 2nd. I took it apart, and found everything looks good, but the forward drum flowered out and started slightly cutting into the case. Also,the sunshell is slightly flowered out. What causes just these parts to go? This is the 2nd time it has done this.
Last edited by TeamTripp; Jul 6, 2004 at 09:26 PM.
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If the input sprag is slipping, it will cause this. Replace the whole assembly with the late GM sprag assembly, it will come with everything you need, including a new input sun gear ($175.00), along with a new GM reverse input drum ($97.33) and a GM HD sunshell ($35.17). Let me know if I can be of help?
Thread Starter
Teching In
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From: Houston,Tx. US
I didnt see anything wrong with the sprag upon quick inspection today. One other major thing I didnt mention, was that when the trans went the this time, the seal around the outside of the pump started leaking badly. Too much line pressure?
Last edited by WadeC; Jul 7, 2004 at 11:32 PM.
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Too much line pressure will not cause this. Look at the sprag & inner race very closely, and if you are not sure what to check, take it to someone who does & you can trust. The drum & sunshell can only be ballooned by the sprag slipping, from what I have seen.
Thread Starter
Teching In
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From: Houston,Tx. US
Thanks for the help. 
The sprag locks one way and moves freely the other,but on the inside, there is a spot where you can see that it rubbed the springs underneath it. The outsides of the springs are rubbed flat. Is this from the type on sprag failure you mentioned or a result of the other damage?
The sprag locks one way and moves freely the other,but on the inside, there is a spot where you can see that it rubbed the springs underneath it. The outsides of the springs are rubbed flat. Is this from the type on sprag failure you mentioned or a result of the other damage? 
