Transmission Advise 4L65E
 

Ok so I am at 100K miles and I am starting to get shuddering under acceleration. This is usually the signs of a torque converter not locking up. And the right fix is to to a rebuild. So kinda looking for some advise here on rebuilding it stronger than stock.

I have future plans to take this truck to over 500HP in the next 12 months and the stock setup is only good for about 390 or so. Is there any kits out there that are streetable that I can get for this trans?

http://www.rpmtransmissions.com/hummerpricing.html

Here is one place that I found. It show a list of improvements made to hold more power. If you talk to a place about buying parts, be sure to tell them of your plans (Nitrous, Supercharger, turbo, etc) cause some parts are subject to change.

They appear to use Precision Industries Torque Converters which are reputable in the DMAX crowd

Northgate transmissions. Ask for Mike Yeager and tell him scott pater sent ya although my name may not work out too well :rolleyes: :D .

Well my father in law owns a transmission shop. But he hardly does anything but stock rebuilds. I am also looking into a 4l80e swap. So if anyone knows anything about that it would be great to hear from you.

PM sarge on here, get John Carr's number... trust me.

x2

DEF go 4l80e if it all possible... i have one in my 01 2500 chevy with 230k on it...pull a trailer everywhere and im not nice to it...first auto i have ever had that held up to my driving lol

False alarm. All that shuddering was coming from a bad 1/2 shaft. Its fixed and Im looking to go wheeling tomorrow.