SM465 too a 205 what crossmember?

[Tufftruck69]

builds an 1987 Blazer with a sm465 to a np205 t case stock cross bar has 5 inches drop now switched from round extension housing to the 8 style 5 inches drop difference I’m wondering if anyone has a link or advice on a crossmember for the transmission

 

[cheavyk10]

There are a few different factory crossmembers. Sounds like you need the early flat style to match the tall foot adapter. Both later styles (85 & up) used the short foot adapter.
The flat style 73-84:

And the W style 85 and up:

And this later one too:

 

[Tufftruck69]

But if it’s flat my angles are all off

 

[obijuank5]

You need a 73-84 k5, k10, k20 crossmember and mounts. When you use that crossmember it will put everything back to the oem position.

 

[Wes Harden]

Can you see the pictures in @cheavyk10 post ?
Best bet is to give us a casting number from your adapter.
The sm465 and np205 has the flat cross member from the factory. K30 might be different.

 

[tarussell]

Just for his clarification in identifying the crossmember the one that we all call “flat” for the long foot mount adapters of 73~84 K5,10 & 20 variety does have a raised section on each side where it attaches to the frame just as that first picture shows - this is the most common one made.

Like Wes said - beware of a K30 crossmember that is truly damn near flat from 77~84 as this will not work.


If your running a figure eight NP205 then you are look’n for the one in that first picture just as the others have said.

 

[Diannaaddan]

builds an 1987 Blazer with a sm465 to a np205 t case stock cross bar has 5 inches drop now switched from round extension housing to the 8 style 5 inches drop difference I’m wondering if anyone has a link or advice on a crossmember for the transmission

Hi,
You might want to check out crossmembers made for heavy-duty swaps; ORD (Offroad Design) has options that fit the SM465 to NP205 setup and could work with the drop difference you mentioned. Alternatively, you could custom-fab or modify a crossmember to accommodate the new setup if an off-the-shelf solution isn’t available.

Thanks

 

[nvrenuf]

Like Wes said - beware of a K30 crossmember that is truly damn near flat from 77~84 as this will not work.

@Tufftruck69 The crossmember in the foreground of this pic is from a K30 and ONLY fits a K30 frame. The crossmember in the background is from a 69-72 however it is basically the same as a 73-84 K10 or K20 crossmember.

Hi,
You might want to check out crossmembers made for heavy-duty swaps; ORD (Offroad Design) has options that fit the SM465 to NP205 setup and could work with the drop difference you mentioned. Alternatively, you could custom-fab or modify a crossmember to accommodate the new setup if an off-the-shelf solution isn’t available.

Thanks

ORD does not make a tcase crossmember, they only make an engine crossmember. There is a new tcase crossmember on the market but I can't remember who makes it. (I'll update this when I find it)

 

[nvrenuf]

It's amazing the ads that pop up on Instagram, it's almost as if my phone was listening when I repeated "square body transfer case crossmember" 4 time.

Dirty Dingo Motorsports has a new crossmember they just started advertising HOWEVER while they say it fits a 73-84 truck it appears the intent is to fit 85+ short foot adapters in these trucks (certainly for the LS crowd).

clicky >>>

1963-87 K 4X4 Transmission Cross Member

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