1/4milelarry

I have a 4l80e in my truck now, it has a shift kit and 3600 stall. Don't know specs on shift kit. I'm building a new motor for my truck, other than temps and installing a bigger trans cooler what are the 80e's weak points? How much hp/tq can it handle ? And what will be the first things that are most likely to go out ? Thanks the help!

1969x11

iTrader: (38)

Most suggest the 80e with the hd-2 kit is good for around 700+ that number would naturally decrease in a heavy platform such as a crew cab 4x4.

1/4milelarry

What is all in the hd2 kit? And the trans is in a 1500 ext cab, short bed, 2wd. I'm waiting on heads, and turbo parts but the motor is a 408 shooting for around 900whp Thanks for the info I will look into the hd2 more

1969x11

iTrader: (38)

http://www.summitracing.com/parts/tr...-hd2/overview/

1/4milelarry

So ur saying a shift kit is all that is needed to withstand 900hp? And a upgraded trans cooler. The input/tail shaft will hold?

1969x11

iTrader: (38)

No I was implying a shift kit should get you by on 750 wheel. You should ask Atomic or Smokeshow about a high horsepower build...better yet pm Gilbert@Ace transmissions or Jakes they should be able to help.

1/4milelarry

Will do, thanks for the info. But I am surprised that shift kit will get it to hold up to 700whp ! This is my fist gm, ls build other than offroad and I gotta say gm parts continue to blow my mind what they can hold up to!

53bowtie

iTrader: (6)

Remember, the 80e was designed to be in a 3/4 ton or 1 ton truck pulling a load. When you put it in a lighter vehicle it will take a lot of abuse in stock form. You will probably need more than a shift kit to hold your goal of 900 whp though.

03sierraslt

iTrader: (22)

If you plan to lock the converter at wide open you will need some billet parts, there are allot of internal mods that can be done to strengthen a 80e it just depends how far you wanna go.

swift700

iTrader: (3)

I blew the direct clutch twice. If you go with the HD2 kit, drill the valve body to the largest size. Use Kolene steels and good clutches.