Transmission axle boot plate difference

[palmgreen57]

Hello.
I just recently noticed these differences of diameter and height on boot plate, I have been told there was early and later design... Maybe to avoid leak?
Does someone know when it changed approximately?
Thank you
Yan

[ZENVWDRIVER]

… looking in my 10/1957 VW parts book - shows that retainer, you referenced as part number 111 501 141, qty. 2 AND an under sized one 111 501 143 - no ch. number break mentioned - listed are 2 retainer gaskets > a 0.3 and 0.1mm... all found on page 5-3, illustration 17, numbers 4,3,2... An * appears = used on type 2 also.

Nothing is mentioned in Car of the Century, by JT GARWOOD ( I looked in 1945 through 1950)- z

… i'd say, just a running change ...
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[palmgreen57]

Hello, OK it's well referenced with 2 differents parts so.
I'm curious to know why...
Nobody knows more about?
Thanks

[Mr. OGPaint]

okay, I'm spit balling here...but is the difference possibly to indicate that one is used for early trasaxles that do not have the plastic "flower" between the transaxle and the bell of the axle tubes?
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Patrick Hall

[palmgreen57]

I didn't think about that, that could be the reason yes
The larger one came from a transmission with that plastic flower

[Martin Southwell]

Does that mean that you can use the 'plastic flower' on an earlier transmission, if you use the later, taller, cover? I ask this because I've just taken an earlier box apart, and because of swarf (from worn out bearing?), or whatever in the oil, the surface of the mag alloy casing, upon which the axle tube pivots, is badly scored, and maybe using the 'plastic flower' could make it usable again?

[Mr. OGPaint]

The non flower transaxle is not machined to accept the flower buffer. the flower won't fit the ID of the axle hole
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Patrick Hall

[Martin Southwell]

From what I'm finding as I go along with various gearboxes, is that the plastic daisey doesn't seem to have been fitted to split case boxes, including the 3 synchro, although I'm sure I have such a box (stored elsewhere, & I will compare later) with them fitted.

I've just noticed in my Scientific Publications, 'All Cars Up To January 1960' Workshop Manual, that it says that the plastic shims were introduced in September 1958.

As you say, the ID of the shaft opening is smaller on the 3 synchro, and no doubt earlier boxes, but if the case we machined out slightly to accept them, would there be problems fitting the original metal covers covers, with a need to use the later ones?

The reason I'm keen to find out, is because the original case from the oval has heavy scoring (lined grooves) in one area, and once polished out as well as possible, the use of the plastic spacer would prevent future acting of steel upon the mag alloy.

I'm sure this has all been done somewhere in the deep & distant past, and especially when trying to keep a vehicle as a matching numbers car.
Below are pictures of a 3 synchro box with new 'daisey' resting on the original ID hole.