two suppose to be 2004r 2 dffrent housing

[riviera]

Help! help! My tranny in my 87 gn is bad so I bought a suppose to be buil 200r4 I pull the tranny the weekend putting the rebuild 1 in this weekend to make a long story short I put them side by side the 1 that I pulled out on the housing where the 2 top bolts go (left bolt and right bolt) the housing looks like it has dip between the to bolt holes kind of like you would draw a smile ) my new 1 dosent have that cut out it just goes stright across any help would be appricated

 

[TexasT]

Pix?
Sounds like one is the universal case and the other the bop case.

 

[riviera]

not sure what bop and i dont know howto add pix

 

[MeanBuicks]

As Rich says, one is universal which fits Chevys as well as traditional Buick, Olds & Pontiac engines (BOP). On the 2004R this is actually the most common and it's what the GN's had from the factory.

http://www.crankshaftcoalition.com/wiki/File:Th350C_unicase.jpg

The less common 2004R has the BOP pattern only.

http://hotrodders.com/gallery/data/500/medium/buick-2004r.jpg

Either one will fit the Buick V6.

 

[riviera]

meanbuick the 2nd site u sent me look just like the 1 i took out is that the universal 1 just curious.so in all it should fit? are the inner working still the same for a bop or are they diffrent for a gm withe a universal housing

 

[SSedan64]

meanbuick the 2nd site u sent me look just like the 1 i took out is that the universal 1 just curious.so in all it should fit? are the inner working still the same for a bop or are they diffrent for a gm withe a universal housing

The "Hotrodders" Pic is the BOP case has 6 mounting holes.
The Uni case has 10 mounting holes for Chevy/Buick/Olds/Pontiac & Caddy engines, Pic below.
The GN Tran's Valvebody, Servo & Pr. Reg., Boost Valves, etc.. in Pump are higher performance parts.

 

[riviera]

What's the chances that the servo valve body from a gn would be in a universal body thae tranny was build by lee thomas so I'm hoping it has all the good suff from the gn I bought it from a guy that never installed it