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Big block 440 bellhousing dimension questions (help)

Discussion in 'Projects, mods, restoration' started by rockosocko, Jun 26, 2020.

  1. rockosocko

    rockosocko Active Member

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    Good afternoon guys n gals.
    I've been searching for a bell housing to adapt my camper 440 to a A833 overdrive manual transmission.

    Well, I found a person whose got some older parts (mostly rusty from sitting it looks) and has a few Cast iron bell housings.
    BUT.. from the pics, it looks like each one has a different bolt pattern that bolts to the body of the trans.
    SO, how many big block bell housings bolted to WHAT? Do they ONLY bolt to a A833? If so, why would there be 2 different patterns? (that mount to the trans body)
    Also, Do the older (late 60's- early 70's) Poly engines have the same bolt pattern that would fit the 440?
    (because I found an older 'yard' that's got a couple older Dodge buses, and they have the poly blocks)

    Kinda NEED the HELP here before Saturday!!
    It's about 1.5hr drive one way, and don't want to waste time driving all that way for nothing..

    Thank you.
     
  2. dana44

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    Try these guys, their website gives descriptions and applications and part numbers when available. It should help, I have used them in the past with great results.
    Brewer's Performance - Mopar A833 4-Speed Transmission and Component Specialists (at http://www.brewersperformance.com/products.php?cat=28 )

    With that, I don't think anything besides the A833 for a 4spd trans was used behind the 440, the NP435 was the top loader truck transmission. I don't think they had the same bolt pattern, but this website should confirm that.
     
  3. hemirunner426

    hemirunner426 Well-Known Member

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    Only back here to try and help,nothing else.still find it toxic.

    60's and early 70's era D series pickups came stock with a 383 and a NP 435.There is your bell housing. The small block bell housing are drilled for the np 435 or the 833.Not 100 percent sure but I think the big block bell housing would be drilled for both tranys also.

    hope this helps.
     
  4. AC TC

    AC TC Well-Known Member

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    If i remember correctly is the poly, 1g hemi and smallblock boltpattern the same.
    - i also have something in my head that says that the input shaft beraring support is different in diameter between different trannies and that will create problems with mating the tranny to the bell, to big and it wont slide in and to small it wont pilot correctly.
     
  5. valiant67

    valiant67 ...

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    You won't find a stock bell housing to do what you want, as I understand it. The OD bell housing has a larger hole for the transmission register and were only made for LA engines and slant 6..
    This means:
    1) Custom bell housing, i.e.: opening up the transmission register.
    2) Putting the A833 OD guts into an old, non-OD A833 case.
     
  6. DC-93

    DC-93 Well-Known Member

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    Call Wayne Brewer at Brewers Performance.

    One of the top trans guys in the business.
     
  7. dana44

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    Brewerperformance.com has a metal ring to adapt the small input shaft cone to the larger diameter input shaft cone bellhousing, so that isn't an issue.
     
  8. valiant67

    valiant67 ...

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    Brewers does sell an adapter to mate a 4.354" transmission to a 4.807" bell housing, but if the poster has the overdrive transmission, that requires a 5.125" opening if the overdrive transmission is in its original aluminum case.

    Some (maybe all) bell housings were made to accept either the 3 speed manual or 4 speed manual transmission. This may be why you are seeing multiple bolt patterns on the bell housing.
     
  9. dana44

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  10. AC TC

    AC TC Well-Known Member

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