ConcoursMustang Forums

1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1969 - 70 Shelby => Topic started by: ddonzella on August 09, 2015, 09:18:18 PM

Title: Leaf Spring Identification
Post by: ddonzella on August 09, 2015, 09:18:18 PM

Hi,

Can anyone translate the following number on my 70 Shelby?  89MS5560A

Thank You!

Title: Re: Leaf Spring Identification
Post by: J_Speegle on August 09, 2015, 10:42:21 PM

Believe it was the sub contractors attempt at a Ford like engineering number

S9MS - 69 Shelby prefix
5560 - base number for a leaf spring assembly
A - version

Title: Re: Leaf Spring Identification
Post by: ddonzella on August 11, 2015, 09:31:12 AM

Thank You! Chalk up one original rear leaf spring!

Title: Re: Leaf Spring Identification
Post by: Bob Gaines on August 11, 2015, 11:15:20 AM

69/70 Shelby leaf springs are unique . The technique that many use to take the original bottom plate and transplant it to another set of springs will not work on a 69/70 Shelby like it does on every other Mustang. The only common section of leaf spring on the 69/70 Shelby is the eyelet section .The rest are Shelby unique in length.

Title: Re: Leaf Spring Identification
Post by: ddonzella on August 13, 2015, 09:20:42 AM

Thanks Bob. Listen to this, in inspecting the passenger side rear spring I notice the short spring which would have the production number is missing the numbers and is 1 1/2 inches longer than the drivers side. Additionally the "rounded" end on one edge is cut wrong. Just one surprise after another!! Must have been a fabricated replacement though poorly done!

Title: Re: Leaf Spring Identification
Post by: ddonzella on August 17, 2015, 01:58:46 PM

Of additional note: when I took the longer, cut wrong short spring missing the ID numbers off I flipped it over and found a CZ---- numbers! Unbelievable. Must be a normal mustang piece replacing the AO Smith piece.

Title: Re: Leaf Spring Identification
Post by: Bob Gaines on August 17, 2015, 02:05:14 PM

Quote from: ddonzella on August 13, 2015, 09:20:42 AM

Thanks Bob. Listen to this, in inspecting the passenger side rear spring I notice the short spring which would have the production number is missing the numbers and is 1 1/2 inches longer than the drivers side. Additionally the "rounded" end on one edge is cut wrong. Just one surprise after another!! Must have been a fabricated replacement though poorly done!

Quote from: ddonzella on August 17, 2015, 01:58:46 PM

Of additional note: when I took the longer, cut wrong short spring missing the ID numbers off I flipped it over and found a CZ---- numbers! Unbelievable. Must be a normal mustang piece replacing the AO Smith piece.

  Just another example of past owner modifications .