How Class 8 backlog-to-build ratios, fuel prices, and make-specific buyer pools shape used heavy-duty truck resale values. Updated monthly alongside ACT Research and FTR Associates reports.
TL;DR
Used Class 8 truck values track the OEM backlog-to-build ratio. Long backlogs (above 9 months) push fleets into the used market and lift resale prices; short backlogs (below 4 months) soften used values as new-truck incentives pull demand forward. Freightliner Cascadia and Kenworth T680 lead residuals across nearly every cycle.
As of 2026-04-18, used Class 8 heavy-duty truck resale values are priced primarily against the OEM backlog-to-build ratio reported monthly by ACT Research and FTR Associates. When the ratio sits above roughly 9 months, new-truck supply is constrained, fleets shift demand to used equipment, and dealers pass premium pricing through to late-model sleepers. When the ratio drops below 4 months, OEMs push incentives on new builds, trade-in volume spikes, and used values soften across the board. Make-level resale character layers on top: Freightliner Cascadia and Kenworth T680 retain value fastest due to buyer-pool depth and parts/service density, Peterbilt 579 commands an owner-operator premium, Volvo VNL and Mack Anthem trade in narrower fleet-to-fleet pools, and International LT is still rebuilding residuals versus the MaxxForce legacy. Automated manual transmissions and emissions-current powertrains consistently lift residuals by 5–10%.
The single most predictive metric is the Class 8 order backlog expressed in months of current OEM build rate. Here's how each band typically translates to used-truck resale direction.
| Backlog band | Market condition | Used value impact | Direction |
|---|---|---|---|
| Below 4 months | Short backlog, OEMs have open slots | Used values soften; dealer inventory days-on-lot rises | Falling |
| 4–6 months | Balanced; modest OEM push into production | Stable residuals; buyers have leverage | Neutral |
| 6–9 months | Tightening; fleets place forward orders | Used values firm; sellers gain pricing power | Firming |
| Above 9 months | Constrained; build slots sold out | Used premium inflates; late-model sleepers lead | Rising |
Every Class 8 nameplate has its own resale character. These tendencies are editorial, based on our read of ACT, J.D. Power, and auction-comp data from Ritchie Bros. and Sandhills.
Deepest buyer pool, strongest aerodynamic-era resale. Evolution / DT12 AMT spec leads residuals. Parts & Detroit service density support retained value in every region.
PACCAR MX-13 with Eaton Endurant AMT holds value strongly. Premium cab perception and owner-operator demand lift auction comps. Next-gen T680 aerodynamic updates raising year-1 residuals.
Shares platform with Kenworth T680 but commands an aesthetic premium among owner-operators. Custom sleeper configurations fetch strong private-party resale above book.
Integrated D13 + I-Shift powertrain holds value for fleets already running Volvo service. Narrower resale pool limits private-party demand; strongest in fleet-to-fleet trades.
A26 engine era improving residuals vs. prior MaxxForce reputation. Strong regional resale in Navistar dealer footprints; softer in spot auction.
Vocational and regional lanes strong; long-haul resale thinner. MP8 + mDRIVE AMT holds value best when spec'd for regional delivery and dedicated contracts.
A generalized Class 8 sleeper depreciation curve. Your specific truck's depreciation will vary with spec, maintenance history, and regional demand.
| Age / mileage band | Annual depreciation | Notes |
|---|---|---|
| Year 1 (0–125k mi) | ~20% | Out-the-door new-vs-used spread |
| Years 2–3 (125k–400k mi) | ~14%/yr | Still under most OEM warranties |
| Years 4–5 (400k–650k mi) | ~12%/yr | Sweet spot for owner-operator entry |
| Years 6–8 (650k–900k mi) | ~9%/yr | Approaching engine rebuild horizon |
| Year 9+ (900k+ mi) | ~7%/yr | Price floor at rebuild-cost parity |
Backlog-to-build ratio divides the cumulative outstanding Class 8 OEM order backlog by the current monthly build rate, expressed in months. A ratio above 9 months signals constrained new-truck supply — fleets turn to the used market and resale values stay elevated. Below 4 months signals excess OEM capacity, fleets cancel orders, and used truck values fall as lease trade-ins and auction volume climb. ACT Research and FTR Associates publish this metric monthly.
Resale character varies by make and spec. Freightliner Cascadia and Kenworth T680 have the deepest buyer pools (parts, service network) and lead aerodynamic resale. Peterbilt 579 commands an aesthetic premium and owner-operator demand. Volvo VNL holds value well for integrated-powertrain buyers but trades in a narrower pool. International LT and Mack Anthem have softer spot-market pricing but strong regional lanes. All else equal, automated manual transmission + DPF-current emissions + spec-appropriate rear ratio drive the highest residuals.
Mileage is the dominant variable after year. As a rule of thumb, used Class 8 sleeper trucks depreciate roughly 20% in year 1, 12–15% annually in years 2–5, and 8–10% annually thereafter. A truck at 500,000 miles is in a sweet spot — out of the original warranty window, still well within engine rebuild interval. Beyond 750,000 miles, depreciation flattens because the truck is already at a rebuild decision point; dealers price to the next owner's rebuild assumptions.
The industry references ACT Research (Classes 5–8 publications), J.D. Power commercial truck values, Sandhills Global (TruckPaper auction comps), and Ritchie Bros. auction results. TruckRadar aggregates dealer asking prices across our listing partner network to show median active-market pricing by make/model/year/mileage band.
Long backlogs (above 9 months) are the best window to sell used equipment — new truck supply is constrained, so used prices hold. Short backlogs (below 4 months) are the best window to buy — OEM incentives hit new trucks, pulling used prices down in sympathy. Fleet operators running tight trade-cycle programs often sell during long backlogs and repurchase later in the cycle to maximize residual capture.
This page is editorial and refreshed monthly in tandem with ACT Research and FTR Associates order reports. Active market pricing on individual trucks updates in real time through our dealer inventory feeds — browse /trucks/class-8 for live listings.