1957 Imperial rear springs
I didn't think that there were so different springs during one
year only !!! On the 4dr HT you've 4 references !! I don't know what are the
diffrences between them and if you could interchange. Some right springs were
later used on left side, some sedan springs became later 4dr HT springs, etc..
Note that, other oddity, they continue on some '58 models !
But '58 models have a different frame because '58 rear springs are 2" longer in
the rear half (the rear shackle support is welded nearer the end of the
frame), see below. So maybe some '58 models were built on 57 frame ? Please let
me know your part number, it is readable if you clean the smallest leaf, see pic
"on my car".
So be careful when you order springs !!!

Here are the dimensions of 57 and 58
models:
1957 : AB = 37" / BC = 21"
1958 : AB = 39" / BC = 21"
Width of spring: 2 1/2" 
Here is a table (according to 5558 parts manual) about
standard rear springs. Note that i haven't listed the "heavy duty" stuff (3
references) and i haven't listed the interchange between Chrysler (NY, Saratoga)
and Imperial.
Rear spring # 
4 dr sedan * 
2 dr HT (Sp. Clb Cp) * 
4 dr HT (sp 4 dr sedan) *

2 dr converible cp. * 
1730 191

Right, after
C5710458
(1958) Right, up to LY13145 
//////////////////// 
1730 192 **

Right, from
C571829 to 10458 
Right, after C5710524
(1958) Right, up to LY13166 
Right, after C5710524
(1958) Right, up to LY11787 
1730 193 ***

Left, after
C5710458
(1958) Left, up to LY13145 
Right, from C574851 to 10524 
Right, from C572005 to 10524

1730 194 **

Right, up to
C571829
Left, from C571829 to 10458 
Right, from C571991 to 4851
Left, after C5710524
(1958) Left, up to LY13166 
Left, after C5710524
(1958) letf, up to LY11787 
1730 195 ***

Left, up to
C571829 
Right, up to C571991
Left, from C574851 to 10524 
Right, up to C572005
Left, from C572005 to 10524 
1730 196

//////////////////// 
Left, up to C574851 
Left, up to C572005 
* : The 4 dr sedan and 2 dr HT have the same frame w/o
"X" crossmember. The 4 dr HT and the convertible have the same frame with
"X" crossmember.
** : these springs have 8 leaves (verified on my wrecked
'57 4dr HT)
*** : these springs have 7 leaves (verified on my '57 conv.)
Click to enlarge





left part number location 
right (1730 192) 
left and right
springs from a 4 dr HT (after C5710524) 










G = left
D = right 
on my car (serial
< 10 000). 
