Angular 4 scroll a div a certain amount

I have a div whose height is given and it has overflow-y: auto, so when necessary it has a scrollbar.
Now I want to be able to scroll that div a certain amount on an event. So far I've been able to scrollIntoView(false) which just scrolls it to the bottom. I want to scroll it almost, but not quite to the bottom. I do not want to scroll the window, as this div is position: fixed relative to the window.
From what I've seen this is technically possible, but people keep referring to various plugins. Right now a plugin is not an option (maybe for some future release, but not now).

<form novalidate #searchFilterForm [formGroup]="filterForm" role="application">
<section id="searchFilters" role="form">
<div class="search-filter-tab" #searchFilterTab>
..
</div>
<div #searchFormContainer class="search-filter-container" >
<div class="search-filter-header">
...
</div>
<fieldset class="search-filter-checkboxes search-mobile-small" >
...
</fieldset>
<fieldset class="search-filter-sliders search-mobile-small" >
...
</div>
</fieldset>
<fieldset class="search-filter-dropdowns search-mobile-small" >
...
</fieldset>
<fieldset >
<span #scrollToHere></span>
<div class="search-filter-text-input-container search-mobile-small" *ngFor="let textItem of searchBoxList; trackBy: trackByFunc; let i = index;">

<app-auto-complete
#autoCompleteBoxes
...
(showToggled)="scrollToEndOfFilter($event)"
>
<input
type="text"
autocomplete="off"
[attr.name]="textItem.apiName"
[placeholder]="textItem.label"
[attr.aria-label]="textItem.label"
class="search-filter-text-input"
>
</app-auto-complete>
</div>
</fieldset>
</div>
</section>
</form>


Typescript:

scrollToEndOfFilter(ev){ //ev == {shown: true/false, ref: ElementRef}
if (ev == null || (ev.shown == true && ev.ref)){
this.searchFormContainer.nativeElement.scrollTop = 950;
}
}

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