Bellhousing to Oil Pump Mating Surface Damage - Replace?

Synviks

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May 24, 2023
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Going to be swapping in an Allison 1000/2000 behind a 7.3 Ford/International diesel, and want to use the SAE housing and factory International parts bolt the transmission to the engine.

SAE3 bellhousing arrived today and I'm noticing some damage. This will be my first Allison build so I don't have an experienced enough eye to know if I should send this back or if the damage is inconsequential. Was hoping to get some more seasoned opinions.

Biggest issue is where the oil pump housing oring meets the bell housing. I'm not sure where exactly the oring sits so not sure if any of these are major issues.
PXL_20230524_214833298~2.jpg

These two areas might scratch the oring when putting the housing on... might be able to knock them down if need be.
PXL_20230524_211645299.jpgPXL_20230524_211803854.jpg

These surfaces are around where the oil filter is... not sure if this is enough to compromise the gasket.
PXL_20230524_204927281.jpg
 

1FastBrick

Well-known member
Dec 1, 2016
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In the second picture, That one chip looks like it's cracked. I don't know what bolts up or seals in this area but I Would imagine it could compromise that. Sorry I don't have experience building these transmissions.

Do you think it was sent this way or happened in transit?
 

Bdsankey

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Vendor/Sponsor
Feb 1, 2018
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Larsen, Wisconsin
Going to be swapping in an Allison 1000/2000 behind a 7.3 Ford/International diesel, and want to use the SAE housing and factory International parts bolt the transmission to the engine.

SAE3 bellhousing arrived today and I'm noticing some damage. This will be my first Allison build so I don't have an experienced enough eye to know if I should send this back or if the damage is inconsequential. Was hoping to get some more seasoned opinions.

Biggest issue is where the oil pump housing oring meets the bell housing. I'm not sure where exactly the oring sits so not sure if any of these are major issues.
View attachment 115082

These two areas might scratch the oring when putting the housing on... might be able to knock them down if need be.
View attachment 115083View attachment 115084

These surfaces are around where the oil filter is... not sure if this is enough to compromise the gasket.
View attachment 115086
Personally I'd be asking for a replacement as that has seen some serious hits. Both middle images are concerning in terms of sealing properly.
 
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