4L80 swap

[MrFlorida]

I am new here so Id first like to say hello to all and God bless, hopefully I can be of some use to you all as well. Well here goes nothing. I own an ol 1991 chevy 3500 dually single cab dont know if it was the original engine or not as I am not the first owner but it currently has the 454 powered by the famous th400. I am in the process of plotting an overhaul installing the Lq9 the engine I am sure will fit without issue as the engine compartment is massive, my question is will the 4L80 fit or will I be up the creek in headache? Thanks in advance.

 

[Will L.]

There are others here with more knowledge than me, but I’m pretty sure it will fit without major in convince.
https://www.tciauto.com/trans-dim
And a few pics incase the link dies in the future:

 

[MrFlorida]

There are others here with more knowledge than me, but I’m pretty sure it will fit without major in convince.
https://www.tciauto.com/trans-dim
And a few pics incase the link dies in the future:
View attachment 62319View attachment 62320View attachment 62321

Thank you kindly MrMarty51 I appreciate it.

 

[MrFlorida]

Will L. Thank you kindly sir the information is not going to waste I assure you that thanks for taking the time to provide this. Hopefully I will be able to return the favor.

 

[THEFERMANATOR]

All 91 8 lugs came stock with a 4l80e, square body as well as gmt400, so somebody has swapped yours out before.

 

[MrFlorida]

All 91 8 lugs came stock with a 4l80e, square body as well as gmt400, so somebody has swapped yours out before.

Man O man, go figure. All things considered it sounds like there won't be anything to concerning to scratch me head on. Thank you kindly sir knowledge truly is power.

 

[EWC]

Which series truck do you have ? Old body style is R/V , newer is the C/K series .

 

[Jaryd]

I have factory service manuals and Electrical manuals for that truck that I’d sell.

 

[MrFlorida]

I have factory service manuals and Electrical manuals for that truck that I’d sell.

 

[MrFlorida]

Which series truck do you have ? Old body style is R/V , newer is the C/K series .

Good Morning bud I am not sure which exactly but here is a picture. Sorry for the wait just been going going going. Thanks in advance.

 

[EWC]

That is the CK series .

 

[MrFlorida]

That is the CK series .

I am thankful for the observation I honestly could not of told you or anyone else for that matter. So what is your take on the 4l80e fitment. Thanks

 

[ak diesel driver]

Shouldn't be a problem fitting.

 

[EWC]

Yep , they came stock . I did one in my 86 . Had to move the crossmember back , shorten the driveshaft and do a little on the shift linkage . . You should have holes in the frame to move the crossmember back and deal with the driveshaft . And figure out what was done to the electrical part of the trans .

 

[MrFlorida]

Yep , they came stock . I did one in my 86 . Had to move the crossmember back , shorten the driveshaft and do a little on the shift linkage . . You should have holes in the frame to move the crossmember back and deal with the driveshaft . And figure out what was done to the electrical part of the trans .

Whewww... music to my ears sounds straight forward enough. I will definitely get right on that, I figure I can purchase a new 4l80e for around 2k or so. Thank you kindly sir