Squareback 'Auxiliary Spring?'

[Marc]

That's some chart...It doesn't make it simple to understand when they list both 626 and 676mm lengths within the same VIN ranges. I think I've sorted it out.
According to VW's "Without Guesswork" booklet, ALL swingaxles used the 626mm bar and all IRS used the 676mm.

The "standard" pre`67 Squareback (without M267) used the 24x626mm 361 511 115/116 and the pre`67 non-Squarebacks used the 23x626mm 311 511 115/116.

`66 Squarebacks with the M267 option, all `67 Squarebacks, "standard" `68 Squarebacks (without M249), and `69-up Squarebacks with the M263 option used the same 23x626mm as the pre`67 non-Squarebacks.

"Standard" `69-up Squarebacks (without M263) got the 23.5x676mm 361 511 115C/116C. Evidently this was also an alternate configuration for some `68 Squarebacks, with M249. Note that the long bars take a different, dual-leaf springplate P/N 113 511 205 (the "113" indicates that the part was originally designed/intended for the Beetle). I've never seen an automatic-equipped 1968 Type III, but I presume that like the AutoStick Type I they were available (and IRS) while the 4-speed remained swingaxle until `69...and although no swingaxle cars were imported to the US market after the `68 model year they remained available in other parts of the world. Apparently that's what M263 got ya, the same setup as the "standard" `67/`68 - unless there's some other detail that's different (like the Z-bar diameter) we can probably assume that M267 and M263 are just different nomenclature for the same hardware.

`67 & `68 non-Squarebacks also followed the standard VW/Porsche formula by going down 1mm from their non-Z-bar size, to the 22x626mm 311 511 115B; as with the Squarebacks, some `68 and all `69 were available in IRS, but for the non-Squarebacks that was the 22x676mm 311 511 115D.

[aircooledtechguy]

That's some chart...It doesn't make it simple to understand when they list both 626 and 676mm lengths within the same VIN ranges. I think I've sorted it out.
According to VW's "Without Guesswork" booklet, ALL swingaxles used the 626mm bar and all IRS used the 676mm.

The "standard" pre`67 Squareback (without M267) used the 24x626mm 361 511 115/116 and the pre`67 non-Squarebacks used the 23x626mm 311 511 115/116.

`66 Squarebacks with the M267 option, all `67 Squarebacks, "standard" `68 Squarebacks (without M249), and `69-up Squarebacks with the M263 option used the same 23x626mm as the pre`67 non-Squarebacks.

"Standard" `69-up Squarebacks (without M263) got the 23.5x676mm 361 511 115C/116C. Evidently this was also an alternate configuration for some `68 Squarebacks, with M249. Note that the long bars take a different, dual-leaf springplate P/N 113 511 205 (the "113" indicates that the part was originally designed/intended for the Beetle). I've never seen an automatic-equipped 1968 Type III, but I presume that like the AutoStick Type I they were available (and IRS) while the 4-speed remained swingaxle until `69...and although no swingaxle cars were imported to the US market after the `68 model year they remained available in other parts of the world. Apparently that's what M263 got ya, the same setup as the "standard" `67/`68 - unless there's some other detail that's different (like the Z-bar diameter) we can probably assume that M267 and M263 are just different nomenclature for the same hardware.

`67 & `68 non-Squarebacks also followed the standard VW/Porsche formula by going down 1mm from their non-Z-bar size, to the 22x626mm 311 511 115B; as with the Squarebacks, some `68 and all `69 were available in IRS, but for the non-Squarebacks that was the 22x676mm 311 511 115D.

So,. . . Who's on first??

[Slow 1200]

all this just reminded me that the brown bentley manual has the wrong spec for the rear torsion bar angle for the automatics

[Marc]

The non-squareback automatics (22x676mm bars) were set 1° higher than the 4-speed, but for the Squares with 23.5x676mm bars there was no difference.
The brown Bentley only lists the settings for manual transmission, but it does specify "manual" which should raise a question in the reader's mind.

[Slow 1200]

it did raise the question...but didn't find the answer until it was too late