Originally Posted by 95SSEi
If I have a 4T60E could I swap it for a 4T65E-HD transmission? I am looking at doing some serious upgrades in the next year or so and the last thing I want to do is have 350hp rip my tranny apart. I know the 4T60E is the weaker of the transmissions; besides, I would like to get the Intense 4T65E-HD transaxle with the 3.69:1 gearing. Not sure if the hookup is the same but I assume they are at least close.
I am still uncertain whether I have the Series I or Series II engine but I don't know if that will make a difference at all.
The cost of a series II sc upgrade will be at least $7000.00 and you would have "around" 300hp.The only way to do it is all at once. Because of the lack of interchangeability between the parts. If you are looking for a replacement 4t60-e tranny that will handle 300hp then I can help you. I had mentioned the other sc option before and yes it is available but specifically for the series II non-sc engine. It can though be made to fit a non-sc series 1. These are just options not necessarily better for you. I mention this option for the benefit of other series 1 engine owners who want more moderate upgrades.
I guess what maters is do you want to be limited to 350hp or do you want to play with the big boys? If you want to play with more than 350hp and have the money to do it then L67 is a great way to go.