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.

TH400/205 or TH350/205 or TH350/203?

Discussion in 'The Garage' started by FWP, Feb 25, 2007.

  1. FWP

    FWP CRS

    Joined:
    Oct 11, 2000
    Posts:
    3,845
    Likes Received:
    3
    Location:
    Prescott Valley, AZ
    Need advice on what combo I should go with, keeping in mind cost, parts availability and strength. After hours of searching, my skull is numb:D

    Here's what I have laying around now

    2-4wd TH350s
    1- 2wd TH350
    1- 205 with short 32 spline input (fig 8 pattern)
    1- 203 with adapter (TH350 version)

    I can also get a hold of a TH400 with a 208 output shaft.

    I'll be building the tranny, whichever one I use.

    To use a 400/205 I would need (I think):
    figure 8 adapter
    Long output shaft (4.5" stickout from the case)

    To use a 350/205:
    350/205 adapter
    27 spline input for the 205
    27 splined sleeve

    Or, buildup the stock 350/203


    Going behind a 383 with 400+ TQ and HP.

    Thanks Y'all
     
  2. u2slow

    u2slow 1/2 ton status

    Joined:
    May 9, 2001
    Posts:
    2,217
    Likes Received:
    0
    Location:
    BC Canada
    You won't need to build any transmission is you go SM465/NP205. Then sell all that stuff.
     
  3. muddybuddy

    muddybuddy 3/4 ton status

    Joined:
    Jan 29, 2004
    Posts:
    8,933
    Likes Received:
    1
    Location:
    Fairfax Station VA
    built th350/203/205 and sell the rest :) if not that then 400/205
     
  4. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,179
    Likes Received:
    1,387
    Location:
    E-town baby!
    465, and sell the slush boxes...

    Rene
     
  5. BigEasy

    BigEasy 1/2 ton status

    Joined:
    Dec 18, 2006
    Posts:
    418
    Likes Received:
    0
    Location:
    U-jeen, Oragun
    x2.
     
  6. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

    Joined:
    May 19, 2001
    Posts:
    45,031
    Likes Received:
    366
    Location:
    Vancouver, WA, USA
    th400. You can buy brand new output shafts from PATC (raptor tranny guys) relatively inexpensively. I know they have the short 32 spline (like you need for a a th400-np203) for like $65. the 400 costs the same to rebuild as a th350... go for the beef. :thumb:

    j
     
  7. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    I am going with the TH400 for my next tranny. They are beefy and I shouldn't have any more tranny issues. I am going with a TH400 because I feel a TH350 is only a half step forward from the 700R4 in my truck now and a mild built TH400 should be as strong or stronger then a pretty hefty build on a Th350.

    With my truck I could get both a TH350 or TH400 to bolt in but I want the strongest tranny and I can have them both for pretty much the same price.

    Harley
     

Share This Page