1965 Mustang front and rear sprin rates

Hobo5

New Member
May 18, 2019
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73
New England
Hi,
Could anyone please verify the numbers below: -
The independent front suspension and leaf-sprung rear counterpart were automatically upgraded when the K-code 289 was specified. Affected components included the front and rear spring rates, which were increased from 89 to 101 lb./in. (front) and from 101 to 130 lb./in. (rear) respectively. Along with heavier shock absorbers, the front anti-roll bar was increased from .69" to .84" in diameter, while the steering ratio was reduced from 22:1 to 16:1.
Thank you for any help you may provide,
Regards,
Hobo5
 
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Realmongo

I prefer to be called "Evil Genius"
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It's not that simple. It depends on if it was a coupe, a convertible, or a fastback, then it depends on how it was equipped. The larger front stabilizer was included with the Special Handling Package.
 

Hobo5

New Member
May 18, 2019
5
0
1
73
New England
It's not that simple. It depends on if it was a coupe, a convertible, or a fastback, then it depends on how it was equipped. The larger front stabilizer was included with the Special Handling Package.
Realmongo, aka "Evil Genius"
Thank you for your reply, much appreciated.
Regards,
Hobo5
 

Realmongo

I prefer to be called "Evil Genius"
Founding Member
Oct 10, 2001
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Western Mass
I have a copy of the 1960-1968 Ford Parts Book that shows the spring rates for all the early Mustangs.
 

Realmongo

I prefer to be called "Evil Genius"
Founding Member
Oct 10, 2001
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Western Mass
So you want 1965 K-Code spring data.
Is this for a Coupe, Convertible, or Fastback?
Manual or Power Steering?
Air Cond or no Air Cond?
 
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Hobo5

New Member
May 18, 2019
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1
73
New England
Hi,
Thanks for getting back to me.
Fastback and Coupé would be my interest..
As I understand it, K-cars only came with 4-speeds, no A/C or Power steering.
Thanks again,
H5
 

Realmongo

I prefer to be called "Evil Genius"
Founding Member
Oct 10, 2001
2,310
40
99
Western Mass
The Coupes and fastbacks used the same front springs and there were 2 versions for '65 that were used in the Special Handling Package which was included with GTs and K Codes. It also could be ordered separately on all V8 models. The C5ZZ-5310-E spring was rated at 1491 pounds and was identified by a brown stripe. These were used with power steering and W/ and W/O A/C or manual transmission with A/C. The C5ZZ-5310-F spring was rated at 1413 pounds with a red stripe and were used with manual steering and no A/C.

There were 2 sets of rear leaf springs used. The coupes used 1 style, while the fastbacks and convertibles used the other as they were heavier in the rear than coupes. The fast back and convertible used C5ZZ-5560-E rated at 650 pounds load rate, while the coupes used C5ZZ-5560-F rated at 610 pounds load rate.
 
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