948 to 1275 rib case conversion parts list

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948 to 1275 rib case conversion parts list

Postby Frogbird » Sat Jun 28, 2014 5:02 pm

Can anyone provide me with the specific list of parts that must change to convert from a smooth case on a 948 to a rib case? Just want to make sure I do this right.

Thanks
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Re: 948 to 1275 rib case conversion parts list

Postby Highlander » Fri Aug 01, 2014 1:05 pm

Rear engine Plate
Flywheel
all clutch parts
ribcase throw-out arm
Check pilot bearing inner diameter-pilot bearing
You can use the old slave cylinder, or you can upgrade to the 1275 which is smaller in diameter
Try to find a front cover to the trans with a lip seal, its worth the $$$
That's it.
Mark Haynes
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Re: 948 to 1275 rib case conversion parts list

Postby Frogbird » Fri Aug 22, 2014 5:31 pm

Thanks Highlander. I have most of these parts. Will get the rest.

I'm not sure what you mean by a front cover to the trans with a lip seal, is that the bell housing?
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Re: 948 to 1275 rib case conversion parts list

Postby Highlander » Mon Aug 25, 2014 5:04 pm

Front cover has the pivot ears for the clutch throw out arm and holds the end of the layshaft in place- Its inside of the bellhousing. The later boxes (I think) had a lip seal in the cover that allows it to not leak onto your clutch :shock: . You can find them from MiniMania or MO$$ or on fleabay. its a really good upgrade for your ribcase. :mrgreen:
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Re: 948 to 1275 rib case conversion parts list

Postby hpmowog » Fri Sep 05, 2014 4:51 pm

The front cover with the lip seal is an aftermarket modified stock piece. The original stock part just has a scroll. Last time I bought one, Winner's Circle (Spridget.com) had a much better price than MiniMania.
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Re: 948 to 1275 rib case conversion parts list

Postby Joe Schlosser » Thu Oct 16, 2014 10:57 am

I know I switched the original smooth case trans on my 948 Bugeye to a rib case in th elate 1960s so I don't recall all the parts that were changed but I cannot recall changing the engine back plate.
The pilot bearing is the same for all a series motors, I have used a smooth case input shaft for a clutch alignment tool since forever.
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