Difference between rear T springs

[brokenspoke]

I searced and didnt find what I'm looking for....Whats is the difference between the years of Model T rear springs?

[Jack Innes]

From the Model T encyclopedia:

SPRINGS
1909-1915
All taper-leaf. 7 leaves in the front. 8 leaves in the rear, except for the 1911 Torpedo which used 7. Several types appeared. In one the spring clip was riveted to the leaf, with the bolt running under the spring. On another, the leaf was curled upwards and the clip bolt passed through the curl above the spring. Still another used a separate clip assembly.

Spring perch bushings were “X” bronze from 1909 to about 1912; seamed brass or bronze tubing from late 1911 to mid-1914; and steel from 1914 to 1927. The 1/4” oil hole was added in 1915.
1916-1917 FRONT: Springs slowly changed to non-taper design beginning in late 1915 or 1916 on some production. This was a 6-leaf, non-tapered type until late 1917 when a seventh leaf was added. Main leaf not drilled for oilers until 1917 (approximately).
REAR: 8-leaf tapered.

1918-1921 FRONT:7-leaf non-tapered. Main leaf drilled for oilers.

REAR: 8-leaf, non-tapered, with main leaf drilled for oilers.

1922-1923 FRONT: Same as 1921.

REAR: Same as 1921 plus 9-leaf spring added for the Sedans.

1923-1925 FRONT: Same as 1921

REAR: Same as 1922 but 6-leaf spring added for the Runabouts. 1925 Pickups supplied by the factory used the 9-leaf spring.

1926-1927 FRONT: New 8-leaf spring used on all cars.

REAR: 8-leaf spring for all cars except the Sedans that used a 9-leaf, both the same as used in 1925. The 6-leaf was discontinued.
Note: Accession 166 at the Ford Archives, which contains “Process Sheets” which detail various assembly operations. Indicates that the spring leaves were lubricated with a mixture of graphite and an air-drying paint. This mixture was painted on the leaves as they were assembled. The paint bound the graphite in place so that it wouldn't be squeezed out from between the leaves as the springs flexed.

[Mike V. Florida]

Nice, and all in one place!

[Steve Jelf]

Anybody trying to use the right parts should have the encyclopedia and the Rodda books. They don't cover everything, but they include a lot.

[brokenspoke]

I'm new to Model T ....what does a tapered spring mean?

[15max]

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The ends of the spring leaf are ground to a taper and have a nice radius. The later springs were cut off square or had a chamfer on each side of the leaf. Same thickness at the end as the rest of the spring.

[Jack Innes]

Tapered leaf springs used on earlier Ts

[brokenspoke]

Originally Posted by Jack Innes

Tapered leaf springs used on earlier Ts

Thanks...