12 replies to this topic

[notna]

Hey guys, when I bought my SL/R, it came with a load of spares, including this gearbox. I know it's probably a long shot, by can anyone interpret the paint pen markings written on it? Any significance, or just a reco shop serial number?

 

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[rodomo]

497 might be the cluster part no. which makes it M 21?

[Collo]

Is the T685251 the box serial number?

 

Should be stamped on the rear face of the casing, sideways near the rear extension housing bolts. Drivers side of the box from memory.

[notna]

I'll check for that serial number tomorrow. It was "supposed" to be an M21, so that's an interesting one about the cluster number! Good stuff!

[Bazza]

Hi

 

Cluster 497 is correct for an V8 M21

 

Cheers

 

Bazza

[S pack]

Serial number T685251 aligns with being a 1974 cast housing so F03 may not be the cast date.

[notna]

Is there likely to be a cast date symbol on the housing, similar to that which is on a 253 / 308? I'll have a look over it later today for this and the serial number. The things you learn when you ask huh!!

[S pack]

The cast date should be on the filler plug side of the casing, somewhere below or near the HOLDEN name casting.

F03 doesn't fit as a casting date as a '73 cast casing should have the day of the month first, then the month and year ie 7F3  7th of June 1973.

Also the day of the month won't be a 0 it will be at least a 1.

[arrimar]

Fixed in 2003?

[hanra]

My M21 is 72 date coded.... The original has obviously gone bang at some stage.

Serial # T423745



Old photo.

Edited by hanra, 12 June 2014 - 08:21 PM.

[hanra]

[notna]

You guys were spot on with the box serial number...

 

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And here is the casting date... what does that make it?

 

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I love learning new stuff like this. Really had no idea when I posted the pic. Certainly won't forget now.