Manual Transmission T56 | T5 | MN12 | Clutches | Hydraulics | Shifters

Anyone have the T56 Isolator cup part#?

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Old 09-27-2006, 03:22 PM
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Default Anyone have the T56 Isolator cup part#?

I'm putting my tranny/engine/car back together after a shop dismembered it all then gave it back to me in a basket. I'll just punt on trying to find my old one and purchase a new one. I used my parts CD to locate this part but is says, "N.S." beside it which I believe means "Non-Stock". Do any of you have that part number handy? The last time I bought some of these, I believe they came several to a package.
Thanks!
David K. Wilson
Old 09-27-2006, 08:57 PM
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14105942, GM calls it a sleeve for some reason....
Old 09-28-2006, 05:25 AM
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THanks. Someone posted a very interesting thread on this 'sleeve'. It states that the main difference between the T5 tranny version and the T56 version is that the T56 is to be epoxied into the shift rail. I've replaced my 'sleeve' about 3 times since I had the car, just as a 'maintenance' effort when replacing the clutches, not because they were bad. Never did I epoxy them in, yet I never had a problem. Odd that they stipulate that. By the way, I ordered one from a shop in Houston. I also ordered an old (but usable) LT1 Input shaft so I can line up the clutch/Pressure plate for installs. I hate those crummy plastic input shaft tools that are so imprecise. This tool will eliminate that particular frustration on reassembly.
Old 09-28-2006, 06:40 AM
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Is this something that should be replaced regularly?
Old 09-28-2006, 07:16 AM
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Originally Posted by MeentSS02
Is this something that should be replaced regularly?
I've replaced shifter cup/sleeve anytime I've replaced the clutch/Pressure plate or the shifter(Hurst first, then Pro 5.0). I've yet to have a sleeve actually fail. I suppose there are symptoms (excessive play in the shifter, etc) that indicate when it's gone bad. I was unaware of the epoxy aspect and have always just dropped it in the recepticle on the shift rail and it's been fine. Perhaps I've just been lucky. Anyone that's ever been in my car when I race knows I'm brutal on my powershifts, so the absence of failure is not due to moderate shifting habits.
Old 09-28-2006, 12:33 PM
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dont know why they would use epoxy, it's not goin anywhere...none of the 4th Gen Fbody's i have worked on have ever had signs of epoxy on that part
Old 09-28-2006, 12:39 PM
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Originally Posted by oange ss
dont know why they would use epoxy, it's not goin anywhere...none of the 4th Gen Fbody's i have worked on have ever had signs of epoxy on that part
I agree... Here's the thread I was sent referring to this topic....
https://ls1tech.com/forums/manual-transmission/311113-6-speed-isolator-cup-printthread.html



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