What You're Looking At
This is a combination service/parking chamber - Type 30 on the service side, spring side pushes the pushrod out when air pressure drops, which is what sets your parking or emergency brakes. Long stroke means more pushrod travel before you're out of adjustment room, which most fleets want now anyway since it buys you more life on the slack adjusters.
T3030 shows up as the base part number across a bunch of catalogs because that's basically the industry shorthand for a 30/30 long stroke chamber. NT3030ELS80 is just a manufacturer's way of tagging the same physical part with their own suffix.
On the FL112 you'll typically find these on tandem drive axles, one per wheel end, mounted to the axle housing or spider depending on how the truck was spec'd.
How the Cross Numbers Line Up
T3030, T2435, NT3030ELS99, and the Meritor 3030TN2 all reference the same basic Type 30 long-stroke chamber family. The differences between them usually come down to mounting bolt pattern, pushrod length, and whether it's clamp-type or bolt-on. Don't assume they're interchangeable just because the numbers cross - pull the tag off your old chamber and match the stroke length and bolt spacing before you order.
Watch three things specifically: pushrod stroke (long stroke vs standard - mixing these up throws your brake adjustment off fast), the mounting bolt circle, and whether your truck uses a clamp-type or bolt-on chamber. Get any of those wrong and it either won't bolt up or won't give you the travel you need.
If the tag's gone or unreadable, measure stroke length yourself - long stroke chambers are typically 2.5 inches versus 2.25 for standard, and count your mounting holes. When in doubt, give us your VIN and we'll run it against the FL112 spec sheet for your build year.
Ordering From PartStop
We keep these in stock at the Tacoma counter, so if you're local and need it same day, walk in or call ahead and we'll have it up front. Ship nationwide too if you're not near us - most orders go out same or next business day.
Comes with our standard 6+ month warranty. If it's wrong for your application we'll sort out the return, but the fastest way to avoid that headache is confirming fitment before it ships, not after.
NT3030ELS80 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to NT3030ELS80. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Cross-Reference | T3030, T2435, NT3030ELS99, 12963 |
| Meritor | 3030TN2 |
Frequently asked questions
Does NT3030ELS80 fit my 2012 Freightliner FL112?
Likely yes if you're running Type 30 long stroke chambers stock, which was common on that build, but confirm against your VIN or the tag on the old chamber before ordering - axle and brake spec can vary even within the same model year.
Is this the same as the Meritor 3030TN2?
It's the same Type 30 long-stroke chamber family and crosses over, but Meritor's own part carries their spec on stroke and mounting. Compare bolt pattern and pushrod length against what's on your truck now before assuming it's a straight swap.
How do I know if I need long stroke or standard?
Check your current chamber's tag or measure the pushrod stroke - long stroke runs about 2.5 inches, standard is 2.25. Also look at your slack adjuster type, since long stroke setups are usually paired with automatic slacks. If you're not sure, tell us your VIN and we'll check the factory spec.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.