Lotus Elan

Looking for a Diff Alloy Casing

PostPost by: CG901 » Sun May 11, 2014 5:34 pm

Hi All,
Just got mine off to discover a broken mounting. Before I weld it back and hope for the best, anybody got a old one laying around you would part with? Thanks.
Current: 1965 S1.5 26/4004, 1966 S3 FHC 36/5192, 1958 Fiat Abarth 750GT Zagato, 1967 Brabham BT21B, 1988 Arrows A10B-04, 1991 Brun C91-001.
Past: 1971 Elan S4/SE DHC, 1972 Europa Special, 1980 Esprit Turbo, 1988 March 881-05, 1990 Leyton House CG90105
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PostPost by: CG901 » Mon May 12, 2014 9:57 pm

IMG_5118.JPG and
Is it possible to tig weld the mounting bolt section? Would this weaken the casing?
Current: 1965 S1.5 26/4004, 1966 S3 FHC 36/5192, 1958 Fiat Abarth 750GT Zagato, 1967 Brabham BT21B, 1988 Arrows A10B-04, 1991 Brun C91-001.
Past: 1971 Elan S4/SE DHC, 1972 Europa Special, 1980 Esprit Turbo, 1988 March 881-05, 1990 Leyton House CG90105
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PostPost by: billwill » Tue May 13, 2014 1:33 am

If you have managed to break one, you should probably anyway install one of the strengthening bars fitted to the later models.

It's a steel beam that fits across the top using the same mounting holes.

~~~

I've seen pictures of Diff cases that have been welded at the top, so I think it is possible.
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PostPost by: CG901 » Tue May 13, 2014 2:27 am

Bill, good suggestions. I did get that stiffening brace and plan to install it. Only a guess, but I think the diff mounting broke off when a donut let loose and did a lot of damage on the chassis cross member.
Current: 1965 S1.5 26/4004, 1966 S3 FHC 36/5192, 1958 Fiat Abarth 750GT Zagato, 1967 Brabham BT21B, 1988 Arrows A10B-04, 1991 Brun C91-001.
Past: 1971 Elan S4/SE DHC, 1972 Europa Special, 1980 Esprit Turbo, 1988 March 881-05, 1990 Leyton House CG90105
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PostPost by: pete d » Tue May 13, 2014 9:43 am

Broke a diff lug on my +2 back in the 70's , got it welded back on, was still as good when I sold the car 10 years later ! ,easy peasy
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PostPost by: types26/36 » Tue May 13, 2014 11:00 am

One of mine was welded up about 15 years ago and still going strong, see this thread:
lotus-gearbox-f37/elan-diffs-t14600.html#p69255
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PostPost by: lance54 » Tue May 13, 2014 8:41 pm

Weld it up. This one has had both ears replaced in total and survived 20 years of track use. Not a big fan of the diff brace.....just keep everything tight.
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