Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

383/400 flexplate, different than 350?

Discussion in 'The Garage' started by sled_dog, Mar 11, 2005.

  1. sled_dog

    sled_dog 1 ton status

    Joined:
    Sep 3, 2002
    Posts:
    16,870
    Likes Received:
    0
    Location:
    Austin, TX
    Is the flexplate different between a 350 and a 383? I know balancer is, I just bought my 383 balancer, but what about the flexplate? I was looking on ebay and some look like they have a weight on them and some don't(generic pictures?). So do I need a specific flexplate? All the ones on Ebay are 2 piece rear main and I need 1 Piece. The only one on Ebay that says 1 Piece says 350 and 383 in the title so who knows.
     
  2. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    In the early days of 383's we used 400 cranks , balancers , and flywheel/flexplates . Externally balanced .

    Nowadays with kits you can get it internally balanced for some money .

    If you need a 1 piece main piece its gonna be aftermarket or custom GM performance parts piece , 400's never came with 1 piece rear seal :k5: :k5:

    If you have an auto , you can use 14088765 12-3/4” outside diameter, 153 tooth, 10.75” bolt pattern straight from GM , was used on one piece rear seal ht383:D
     
  3. sled_dog

    sled_dog 1 ton status

    Joined:
    Sep 3, 2002
    Posts:
    16,870
    Likes Received:
    0
    Location:
    Austin, TX
    ha, I do understand that, there are plenty of companies making aftermarket ones. I'm looking for the info as to what aftermarket one I need. Mine is a new crank(Eagle 1 piece rear main cast) but its externally balanced(I should have ponied up for a Forged internal but I was stupid and went cheap).
     
  4. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    Dug one up and added above

    If you have an auto , you can use 14088765 12-3/4” outside diameter, 153 tooth, 10.75” bolt pattern straight from GM , was used on one piece rear seal ht383:D Today 10:01 AM
     

Share This Page