8 speed swap.

ChargedTTq · December 12, 2016

Hey guys, just picked up a 4k mile 2015 LT for real cheap. And while it's under warranty I probably won't be able to do many performance mods, I've been looking into mods after the warranty is up.

From what I'm finding the cam swaps and most supercharger kits are kind of disappointing. Even the $6500 Whipple takes a cam to make 500whp!

I feel like for the price, a 6.2 L86 and 8 speed swap is going to be a smarter idea for the dollar than going with a big Whipple or one of those ridiculously expensive Armageddon kits.

That being said, is there anyone with actual familiarity with these engine and transmissions to be able to say what it takes to swap them? I don't expect it to be a plug and play ordeal, and it can cost a couple thousand to do because since GM wanted to be stingy about the 6.2 the trim levels they came with cost another $10,000 more than what I paid for my 5.3.

Honestly the biggest part of this swap to me is the 8 speed. That thing improves acceleration numbers quite a bit by itself. And with its TQ capacity I can build a forged l83 with as much boost as I want. So my truck will be getting that trans swap someday no matter what.

ChargedTTq · December 15, 2016

Can anyone help point me in the direction of a forum or company that might know what a swap would entail?

cbrsilv15 · December 15, 2016

Swap would prob be around the 6-10k range. That's if you did it yourself too. I'd just trade the truck in and get the 6.2 from the factory.

There's a wrecked 6.2l motor on eBay for 6k+. Tranny and all the brainboxes are a couple thousand more.

Joe Nettles · December 17, 2018

You will need complete engine harness it goes to transmission also ,the trans module bolts to left cowl with harness dry shaft yoke is difference not sure yet on 8 speed on speedometer yet haven’t got to that part yet iam sure it may need to be programmed may need to reprogram the bcm

Nasty · December 17, 2018

Better to supercharge it and be done. I dont see how buying a supercharger is disappointing.

14cris · December 17, 2018

Lol to the guys commenting on a 2 year old post

Sent from my iPhone using Tapatalk

Nasty · December 17, 2018

1 hour ago, 14cris said:

Lol to the guys commenting on a 2 year old post

Sent from my iPhone using Tapatalk

Im an idiot. Didnt even realize that

Donstar · December 17, 2018

On ‎2016‎-‎12‎-‎11 at 7:08 PM, ChargedTTq said:

Hey guys, just picked up a 4k mile 2015 LT for real cheap. And while it's under warranty I probably won't be able to do many performance mods, I've been looking into mods after the warranty is up.

From what I'm finding the cam swaps and most supercharger kits are kind of disappointing. Even the $6500 Whipple takes a cam to make 500whp!

I feel like for the price, a 6.2 L86 and 8 speed swap is going to be a smarter idea for the dollar than going with a big Whipple or one of those ridiculously expensive Armageddon kits.

That being said, is there anyone with actual familiarity with these engine and transmissions to be able to say what it takes to swap them? I don't expect it to be a plug and play ordeal, and it can cost a couple thousand to do because since GM wanted to be stingy about the 6.2 the trim levels they came with cost another $10,000 more than what I paid for my 5.3.

Honestly the biggest part of this swap to me is the 8 speed. That thing improves acceleration numbers quite a bit by itself. And with its TQ capacity I can build a forged l83 with as much boost as I want. So my truck will be getting that trans swap someday no matter what.