Dorman 43-731 rear leaf helper spring for the 1980-1997 Ford F-350 adds extra support to the rear spring pack. The steel leaf works alongside the main rear springs when the truck carries a load.
A rear end that sags under load, or rust and cracks on the spring, can mean this helper spring is worn, though the main leaf springs or the shocks can be behind the same signs.
It is a direct replacement for the 1980-1997 Ford F-350. This listing is one spring, and both sides are normally replaced together.
Fit and size
Build and materials
One leaf helper spring; the 1980-1997 Ford F-350 takes two. Mounting hardware is not included, so plan on new hardware.
Interchange: 22-870 · 43-831 · 043-0731-00
E0TA5588JA · E0TA5588JB · E0TAJA · E0TAJB · E0TZ5588C · E2TA5588AA · E2TA5588AB · E2TAAA · E2TAAB · E2TZ5588A
This part cross-references / interchanges with the following part numbers:
Does the Dorman 43-731 rear leaf helper spring fit the 1980-1997 Ford F-350?
Yes. Dorman 43-731 is a rear leaf helper spring for the 1980-1997 Ford F-350, and that truck takes two.
Does the Dorman 43-731 helper spring come with mounting hardware?
No. Dorman 43-731 is sold as one steel leaf helper spring, and mounting hardware is not included.
What load rating does this steel leaf helper spring have?
Its maximum load rating is 800 lb, and its load increase strength is also 800 lb. It measures 41.5 in long, 2.25 in wide and 1.188 in thick.
Is this helper spring meant to replace one that rusted out?
Yes, it is intended for a helper spring that has failed from rust and fatigue, and a sagging rear end or visible rust and cracks can be signs of a worn one.
Does Dorman 43-731 replace Ford E2TZ5588A?
Yes. E2TZ5588A is one of the other-brand and OE numbers that this Dorman 43-731 helper spring replaces.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
