Raise and lower your front left door glass by hand with the Dorman window regulator, part number 749-758, a manual regulator that moves the window as you turn the crank. It fits many vehicles, among them the 1978-1981 Dodge D400, 1978-1981 Dodge D450 and 1977-1978 Dodge D100, as a direct-fit replacement for the front left position on the listed applications.
This Dorman OE Solutions window regulator is sold as the regulator only. It is designed to take the place of a worn or broken original regulator inside the door.
- Built to mirror the original: precision-engineered and tested so its fit, function and performance line up with the stock regulator on the specified vehicles.
- Cycle tested: run through thousands of up-and-down cycles in an actual vehicle door during testing.
- Engineered in the USA: backed by Dorman's long history in the automotive aftermarket.
- Direct installation: reverse-engineered to the original equipment shape and dimensions for a direct, seamless fit.
Signs a window regulator may need replacing include glass that drops into the door, a window that sits crooked or binds in its track, grinding or clicking from inside the door, or a crank that turns without moving the glass. If a failed regulator is the cause, this unit replaces it. See the "Vehicles it fits" section for the full list of fitting vehicles.
Interchange: 81966 · 4082029 · WLR3016
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Frequently Asked Questions
What does the Dorman 749-758 window regulator do?
It is a manual window regulator that moves the door glass up and down as the window crank is turned. It installs in the front left door on the listed applications.
Does it come with a crank handle or other door parts?
No. Dorman lists this part as the regulator only, so the crank handle and other door components are not included.
Which trucks does this window regulator fit?
It fits many vehicles, including the 1978-1981 Dodge D400, 1978-1981 Dodge D450 and 1977-1978 Dodge D100. Check the "Vehicles it fits" section for the full list.
How can I tell if my window regulator may be failing?
Common signs include a window that drops or sits crooked, grinding or clicking inside the door, or a crank that turns without moving the glass. Diagnose the cause before replacing parts.
Is this window regulator hard to install?
It is reverse-engineered to the original equipment shape and dimensions for a direct fit. Follow the vehicle service information for door panel removal and installation steps.
