Lotus Elan

Pinion flange dimensions

PostPost by: 2tmike » Tue Jun 01, 2021 7:53 am

I'm sure I've seen a sketch on here with dimensions and hole centres but after much searching, I can't find it again.....
Basically I bought a pinion flange at Castle Combe that is the correct OD for my 3.77 diff but I'm not sure about the hole drilling.
What I have is, measured by eye to hole centres :-

Flange OD = 92mm
Hole PCD = 78 mm
Hole spacing, rectangular
Long spacing = 58mm
Short spacing = 48mm
22 splines
Can anyone advise if this is correct for an S4 please?
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PostPost by: jono » Tue Jun 01, 2021 8:59 am

I may be missing the obvious here but can you not just check it against your prop flange?
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PostPost by: 2tmike » Tue Jun 01, 2021 9:39 am

jono wrote:I may be missing the obvious here but can you not just check it against your prop flange?

Not easy to get a good measurement with it on the car and a broken trolley jack......
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PostPost by: Craven » Tue Jun 01, 2021 11:05 am

Not sure if this helps!
diff.jpg
diff.jpg (40.82 KiB) Viewed 226 times
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PostPost by: 2tmike » Tue Jun 01, 2021 6:07 pm

Thanks for that, it does look like I've the right flange for a 3.77 diff within the limits of my measurement!!!!
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