Hey th350 questions please

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.

meatbag

Member
Joined
Nov 18, 2022
Posts
39
Reaction score
21
Location
Kettle falls WA
First Name
Mike
Truck Year
1976
Truck Model
Gmc serria grande
Engine Size
400 sbc
Hey yall so I just bought a new transmission, since it's cheaper than getting it rebuilt. The years say 69 to 79. My trucks a 1/2 ton 76, np203 transfer case. I just dropped a 454 out of a 83 motorhome. I'm pretty sure they fit, but double checking on here with yall more experienced guys.
 

Attachments

  • Screenshot_20230427-141258_eBay.jpg
    Screenshot_20230427-141258_eBay.jpg
    58.8 KB · Views: 36
  • Screenshot_20230427-141246_eBay.jpg
    Screenshot_20230427-141246_eBay.jpg
    55.9 KB · Views: 38

meatbag

Member
Joined
Nov 18, 2022
Posts
39
Reaction score
21
Location
Kettle falls WA
First Name
Mike
Truck Year
1976
Truck Model
Gmc serria grande
Engine Size
400 sbc
Sorry, I dropped a 454 from 1983 in the 76 truck.
 

meatbag

Member
Joined
Nov 18, 2022
Posts
39
Reaction score
21
Location
Kettle falls WA
First Name
Mike
Truck Year
1976
Truck Model
Gmc serria grande
Engine Size
400 sbc
Okay, just what I was wondering. I knew about the flex plate, but yeah it bolts right up. Thanks for the help
 

Rusty Nail

Full Access Member
Joined
Jan 29, 2015
Posts
9,787
Reaction score
9,681
Location
the other side of the internet
First Name
Rusty
Truck Year
1977
Truck Model
C20
Engine Size
350sbc
Ugch


Turbo 350 and a BBC? Sure?.
Prolly have to find the right fancy adapter(s) $50? Who does that though?

For the record, bbc blocks were paired with a th400 , with good cause..not sure why you would want 454/350/203...transmission weak link
the th350 is shifted with a vacuum modulator, the th400 has mechanic/electronic shifting.
they are different.
require different truck systems/parts to work

in closing a 454/th350/203 $not a great idea
:imo:
 
Last edited:

TJ1978

Full Access Member
Joined
Apr 21, 2023
Posts
65
Reaction score
95
Location
arizona
First Name
Tim
Truck Year
1978
Truck Model
K5
Engine Size
350
Above is correct the 454 will work but they were paired with TH400 usually. Browse the web you'll find opinions for positive and negative pairings for your combo.

You have it now, so run it like ya" stole it.
 

Forum statistics

Threads
42,129
Posts
909,808
Members
33,628
Latest member
stevew7704
Top