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Transplant surgery - Swap 6.0 to 8.1 in '03 2500 Burb


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Have a '03 2500 Burb LT Autoride with the 6.0 that will soon be replaced by a lightly used 2013 Yukon XL 2500 for DD and towing the horse trailer.

 

Been thinking about what to do with the '03. From this thread it looks like the 8.1 could drop right in. However there are other posts from around the net that suggest it is not as simple due lack certain parts for 8.1 like say a wiring harness. As far as I can tell no one has done a 6.0 to 8.1 transplant in a Burb - if they have i could not find a mention. When I ordered my '03 the 8.1 was an option so my feeling is that mounts and suspension should be able to handle it. I don't really care about the mpgs on the 8.1. And i believ the tranny would have be swapped from 4l80e to the 85e.

 

Any thoughts?

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lol,the 8.1 has an Allison behind it ,,,,,crazy idea IMHO ,,,unless ya have tons of $$$$

 

enjoy the challenge !!!!

 

 

Your gonna want an Allison with that 8.1. It's gonna thrash any other transmission Sent from my LG-D800 using Tapatalk

 

Can you explain why the allison is needed since GM sold the Suburban and Avalanche with a 8.1L with the 85E? The Sub, Avalanche and Yukon xl didnt have room for the ally so it was the 85 that had to be used. Besides the room factor, GM must have figured the 85 was good enough for the 8.1.

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Sorry I was unaware of that. With the amount of low end torque that the 8.1 puts out I'd still think about it though

 

Sent from my LG-D800 using Tapatalk

 

 

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