Are the M1009 differential covers special military parts?

[TexAndy]

Just went to replace my rear differential cover and the holes do not line up with the replacement I got at Oreilly's.

I told the clerk it was for a diesel 4WD 85 blazer.

Did the military 1009s use a different axle housing from the civilian blazers?

The replacement is a 10 bolt cover... the holes just don't line up and the replacement is slightly too small, to boot.

 

[Mercunimog404]

It's autozone? Maybe try a different store. It's just a 10 bolt.

 

[MuleMac01]

They could of gotten you the wrong part or they might have replaced it with a another axle..

 

[TexAndy]

It's autozone? Maybe try a different store. It's just a 10 bolt.

The old one is a 10 bolt.

The replacement that doesn't fit is a 10 bolt.

Are there different 10 bolt covers?

 

[Mercunimog404]

The old one is a 10 bolt.

The replacement that doesn't fit is a 10 bolt.

Are there different 10 bolt covers?

I was implying that maybe the part from autozone is lower quality and Chinese made. So it could just be wrong.

 

[TexAndy]

Ah, gotcha. Not autozone, but Oreilley's. Same difference. Probably made in China.

 

[Keith_J]

How far off are the holes? That is weird. Guess they use RTV and no gasket. But you could make a tracing and take it back to them.

 

[TexAndy]

1 to 1.5 hole diameters. Pretty far off.

 

[Keith_J]

Must be wrong part. Not out of the standard. I've gotten wrong parts several times. Now Chinese castings? All out of spec. I've had to grind brake parts like wheel cylinders and rotors because the casting surface was way too large. Guess iron is cheap in China.

 

[Drock]

Is your original cover repairable?

 

[KansasBobcat]

Got the exact fit gasket at O'Reillys in Castle Hills (San Antonio) Told them 10 bolt 1984 K5 Blazer. Used RTV on installation. No leaks. Hope to see you at next SA meet. Bob

 

[TexAndy]

Is your original cover repairable?

Maybe. I'm afraid to try, because the only way to secure it to hammer it back out is against the flange. More likely to bend other parts of the flange than to fix the little piece that's keeping it from sealing.

Going to take it back to OR's with me and see if we can find the correct replacement part.

 

[Recovry4x4]

Are you replacing the front or rear? Both are 10 bolts and have different covers. Pics help.

 

[TexAndy]

Are you replacing the front or rear? Both are 10 bolts and have different covers.

Rear. Fork slipped when we were loading it onto the trailer at the GSA yard.

Maybe he gave me a replacement for the front. Thanks, that'll be something to compare.

 

[TexAndy]

Got the exact fit gasket at O'Reillys in Castle Hills (San Antonio) Told them 10 bolt 1984 K5 Blazer. Used RTV on installation. No leaks. Hope to see you at next SA meet. Bob

Thanks, when I get this blazer to where I trust it, I will start making it up to the SA meets.

 

[cpf240]

Is the part # different for an '84? These trucks are all built from '84 parts... if the factory made a change between '84 and the other years in the civy line, the part may not fit the CUCV then.

 

[TexAndy]

I don't know, but I will remember that when I go back to the store. '84 blazer.

 

[Recovry4x4]

Fronts have a fill plug.

 

[TexAndy]

The replacement I got does not have a fill plug. It must be the wrong part.

 

[Recovry4x4]

This does not show the 10 bolt front cover.