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Old 06-23-2007, 05:19 PM   #1
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Default Hardened 4th gear input shaft? Which years/trannys?

I've been reading a bit on this, but haven't gotten the straight scoop...

Supposedly GM started installing a hardened 4th gear input shaft on the 4T65E in later years...anyone know exactly when this started, and whether it was for both 4T65E and 4T65E-HD?
Is there any way to know (RPO code, tranny tag code, build date, etc) whether your transmission has the improved part?
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Old 06-24-2007, 10:35 AM   #2
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Old 06-24-2007, 07:04 PM   #3
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Rogue,

Thanks for the info...does that apply to both the 4T65E and the 4T65E-HD?
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Old 06-24-2007, 07:45 PM   #4
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Originally Posted by Rogue
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so would this apply to my SSEi that was built in 10/02 labled as an 2003??
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