8.1L/4L80E swap into 84 Dually

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,008
Reaction score
8,976
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
So there you go @az3plus3 . Your wanted 8.1/Allison combo was a factory option so you're looking at a direct swap if you can find a donor with that combo and get the ECM and harness.
 

Jrgunn5150

Questionable methods
Joined
Jan 11, 2016
Posts
2,739
Reaction score
1,412
Location
Ionia Mi
First Name
J.R.
Truck Year
1979
Truck Model
C10
Engine Size
6.slow
So there you go @az3plus3 . Your wanted 8.1/Allison combo was a factory option so you're looking at a direct swap if you can find a donor with that combo and get the ECM and harness.


I do have a separate TCM as well, all Allison trucks do to my knowledge.
 

Latest posts

Forum statistics

Threads
41,854
Posts
903,567
Members
33,367
Latest member
texdave
Top