NP208 to NP205 T Case swap

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.

M86K10SS

Junior Member
Joined
Dec 31, 2020
Posts
6
Reaction score
2
Location
Lakeland FL
First Name
Mark
Truck Year
1986
Truck Model
K10
Engine Size
350
I have an 85 K10 with a SM465 and a 208 T Case. My neighbor is selling a 78 SM465 and a 205 T Case. How difficult would it be to swap in the 205, would I need different drive shafts? Will the linkage be different? Any help would be appreciated.
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
28,961
Reaction score
23,479
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
You would need the SM465 from the '78 as well. That 205 is the "figure 8" mounting pattern and has a 10 spline male input. Your 208 is a "round" style mountain pattern and has a female 32 spline input.
 

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,121
Reaction score
6,038
Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
I have an 85 K10 with a SM465 and a 208 T Case. My neighbor is selling a 78 SM465 and a 205 T Case. How difficult would it be to swap in the 205, would I need different drive shafts? Will the linkage be different? Any help would be appreciated.
I think my truck has the same setup as your current one, prob from the same year. But then I also have a setup from a 77 k25 and 80 k25 and based on that, I would say you probably need a different length driveshaft especially because the rear output is probably a flange on the 78 and not a slip yoke. can you get his driveshafts? front may be the same..maybe.. you also probably want his flat crossmember because that figure 8 has feet on it that are meant to set on a flat one
 

Latest posts

Forum statistics

Threads
41,856
Posts
903,621
Members
33,370
Latest member
mitchell1128
Top