John Deere 4640 Specs, Reviews & Used Price Canada (2026)

The John Deere 4640 is the biggest tractor in this guide and the one that farmed the big Prairie fields. Flagship of the row-crop line in the Iron Horses 40-series (1978–1982), it pairs Deere’s 466 cubic inch turbocharged-and-intercooled six — 155 horsepower at the 1,000-rpm PTO, 531 lb-ft of torque at just 1,400 rpm — with a standard Sound-Gard cab, an 83-gallon fuel tank, a Category 3 hitch lifting up to 7,280 lb, and a choice of Quad-Range or Power Shift. Nothing about it was subtle, and nothing about it has quit: Canadian listings today routinely show 7,000–10,000-hour 4640s with documented overhauls, fresh interiors, and dual rear wheels, still doing the work they were built for.

One naming note: John Deere’s modern GreenStar 4640 Universal Display shares the number and floods classifieds searches with precision-ag electronics — this page covers the tractor. Status disclosure: the 4640 is long out of production, successor to the Generation II 4630 and succeeded by the 50-series 4650 in 1983, and this page is written for the 2026 used buyer — typically a grain or mixed operation that needs real horsepower without new-iron money.

Aglist quick take: The 4640 is the working end of the vintage market — bought by the hour of work it still delivers, not the story it tells at shows. The honest framing: hours here are chapters and overhauls are the bookmarks — a 9,000-hour tractor with a documented engine rebuild and shop paperwork routinely beats a vague 6,000-hour one, and the market prices exactly that way. Know three things going in: the PTO is 1,000-rpm only (a genuine implement-compatibility check), listings will quote anything from 155 to 185 horsepower for the same machine, and the factory cold-start system is ether injection — effective, and demanding of respect.

Quick Verdict — Who the 4640 Is For

Buy it if: you need genuine 150-plus PTO horsepower — big air seeders’ support work, heavy tillage, grain carts, large rotary cutters and mowers, silage duty — in a standard-cab, wet-clutch, pre-electronics package at roughly CAD $16,000–$38,000 for working examples. A Quad-Range unit with triple remotes, duals, working climate control, and a documented overhaul is the Prairie buy-once configuration.

Skip it if: 100–125 horsepower covers the work — the John Deere 4230 and the 4430 do it for less fuel and money — or your implements are 540-rpm (the 4640 never had a 540 PTO), or your fields are small enough that seven tonnes of tractor becomes the problem.

Full John Deere 4640 Specifications

Compiled from John Deere technical literature and Nebraska Tractor Test Laboratory data (1978), cross-checked against reference sources. Verify transmission, remotes, and rebuild history on any unit.

Category	Spec	Value
Equipment type	Row-crop tractor	Iron Horses 40-series; Waterloo, Iowa
Production	Model years	1978–1982
Engine	Model	John Deere 6466A, inline-6, direct injection
	Aspiration	Turbocharged and intercooled
	Displacement	466 cu in (7.6 L); 4.56 × 4.75 in. bore/stroke
	Rated power / speed	176.3 engine HP @ 2,200 rpm
	Max torque	531 lb-ft (718 Nm) @ 1,400 rpm
	Compression / air cleaner	15.5:1 / dual dry elements
	Cold-start aid	Factory ether injection system
PTO	Power	155 HP (rated); Nebraska-tested (1978)
	Speed / type	1,000 rpm only, large 1-3/4 in. shaft; independent, hydraulic wet clutch
Listing-quote note	155–185 HP	PTO / engine / dyno figures quoted interchangeably by sellers — same tractor
Transmission (option 1)	Quad-Range	16F/6R partial powershift, wet; 19.6 mph
Transmission (option 2)	Power Shift	8F/4R full powershift, wet; 19.5 mph
Diff lock	Type	Pedal-actuated hydraulic
Steering / brakes	Type	Hydrostatic power; differential hydraulic wet disc
Hydraulics	Type	Closed centre, 2,250 psi; 23 gpm; 16.5-gal system; 2–3 SCVs
3-point hitch	Category	3 / 3N; 5,500 lb standard / 7,280 lb optional at lift pins; quick hitch common
Cab	Standard	Sound-Gard Body with heat; A/C near-universal on survivors
Electrical	System	12-volt, 120 A alternator
Fuel	Tank	83 gal (314 L); auxiliary tanks appear on Prairie units
Fluids	Oil / coolant	20 qt / 38 qt
Weight	Shipping	14,350–15,700 lb
Dimensions	Wheelbase / length	118.5 in. / 171 in.
Drive	Options	2WD standard; hydraulic front-wheel-drive (HFWD) option
Tires	Typical	18.4-38 to 20.8-38 rears (24.5/30.5-32 options); duals near-universal in Canada
Series position	Ladder	4440 below, 4840 (Power Shift only) above; predecessor 4630, successor 4650 (1983)

The horsepower-quote spread, settled. Sellers advertise the same healthy 4640 as “155 HP” (the PTO rating), “172–176 HP” (engine ratings), or “185 HP” (optimistic dyno numbers). Compare tractors on the 155 PTO rating and on condition — the spread is vocabulary, not mechanical difference.

Owner Reviews & Ratings on Aglist

Nebraska tested a new 4640 in 1978; Prairie owners have run the odometer around since. As owners share their experience on Aglist, the rating system tracks:

• Reliability — the 6466A’s record, overhaul history and documentation, cooling health
• Transmission — Quad-Range shift quality or Power Shift pack condition under load
• Cab systems — Sound-Gard bushings, A/C and heat function, interior condition
• Hydraulics — SCV response, pressure health, seepage at working hours
• Value for money — cost per working hour against newer used iron

If you own or run a 4640 in Canada, please leave a star rating and a short note below — overhaul documentation and transmission history are exactly what separates listings that look identical.

John Deere 4640 vs the Alternatives

The Iron Horses ladder frames every 4640 decision.

Spec	John Deere 4440	John Deere 4640	John Deere 4840
Years	1978–1982	1978–1982	1978–1982
Engine	466 turbo	466 turbo-intercooled	466 turbo-intercooled, higher rating
PTO HP (rated)	130	155	180
Transmissions	Quad-Range / Power Shift	Quad-Range / Power Shift	Power Shift only
PTO speeds	540/1000	1000 only	1000 only
Typical Canadian price	Strong demand, deep supply	CAD $10,000–$48,000 by grade	Fewer, specialist demand

Where the 4640 wins: it’s the sweet spot of big vintage power — 25 more PTO horses than the wildly popular 4440 for typically modest extra money, with the intercooled engine’s easy, low-rpm torque and the transmission choice the 4840 gave up. For heavy tillage, silage, and grain-cart duty on real acres, it’s the cheapest honest 155 horsepower in the country.

Where the math flips: if your implements include 540-rpm tools, the 4440’s dual-speed PTO settles it. If the work fits 100–125 horses, the John Deere 4230 and 4430 burn less fuel doing it — and the whole dynasty’s value logic starts with the John Deere 4020 and runs through the turbo John Deere 4320 for buyers mapping their options across eras.

Real-World Performance

Engine — intercooled torque, by the tank

The 6466A is the 40-series’ masterpiece: turbocharged and intercooled for 531 lb-ft at just 1,400 rpm, it lugs through heavy ground the way smaller engines rev through it, and drinks from an 83-gallon tank sized for Prairie quarter-sections (auxiliary tanks appear anyway). The ownership pattern is mature and honest: these engines work to 6,000–8,000 hours, get overhauled — often on John Deere reman programs — and work on. In this market, “overhauled at 7,000 hours, 2,000 since” with paperwork is a selling point, not a confession, and it prices above vague low-hour claims.

Quad-Range or Power Shift — the working choice

Both boxes are wet, both proven, both present in Canadian supply. The Quad-Range’s sixteen speeds suit tillage and mixed duty and reward shifting technique with five-figure hour counts; the Power Shift’s clutchless 8F/4R suits loader-adjacent, silage, and direction-change work and demands the standard exam — every gear under load, no slip, documented Hy-Gard history. The pedal-actuated hydraulic diff lock is the quiet hero in wet spring ground either way.

PTO, Hitch & Hydraulics

The 1,000-rpm-only PTO with the large 1-3/4-inch shaft is the model’s one compatibility gate: big balers, mowers, and cutters of its class run 1,000 natively, but a farm with 540-rpm implements needs to know before buying. The Category 3 hitch (quick hitch common) lifts 5,500–7,280 lb — genuine heavy-implement capacity — and the 23-gpm closed-centre system runs triple remotes crisply on healthy units; Canadian tractors increasingly carry ISO-updated couplers, a small sign of ongoing investment worth noting.

Canadian Winters — and the ether question

The Sound-Gard with working heat makes the 4640 a real winter tractor, and survivors’ A/C condition matters for the other season. Cold starting is the model-specific topic: the factory aid is ether injection, not glow plugs — effective at Prairie temperatures and safe when the metered factory system is intact and used per the manual, hazardous when improvised. The Canadian discipline: block heater as the primary strategy, the ether system inspected and metered as the backup, winter fuel, and batteries sized for a 7.6 L compression start. Our prairie winter equipment operation guide covers the rest.

Common Problems & Reliability Notes

Transparency note: patterns reported across a working fleet now four-plus decades old, not confirmed defects on any given unit — and on 4640s specifically, rebuild documentation outranks the hour meter as the condition signal.

Transmission condition is the price. Reported shifting complaints trace to Quad-Range technique-and-wear or Power Shift pack health — both testable under load in twenty minutes, both four-figure conversations when failed, both fine for another decade when healthy.

Hydraulic pressure and seepage. Low-pressure and leak reports at working hours: check SCV response warm, walk hoses and couplers, and treat lazy rockshaft response as a pump conversation, not a quirk.

Starter, alternator, and battery discipline. The reported electrical items are exactly the high-load ones — a 7.6 L needs real cranking amps, and the 120 A alternator and cables age like everything else.

Fuel-system housekeeping. Filter-clogging and pump reports mostly tell a water-and-sediment story an 83-gallon tank can hide. Water separator condition and filter dates are cheap diagnostics.

Ether-system integrity. The factory cold-start system wants inspection, not improvisation — a missing or bypassed metering setup is a red flag for how winters were handled.

Cab aging — and the refresh economy. Bushings, seals, headliners, seats, and A/C all age; complete interior kits exist and Canadian sellers install them (“all new interior” is a common and legitimate listing claim). Price the cab as its own asset.

The core endures at scale. The 6466 engine family, wet drivetrains, and Deere’s parts-and-reman ecosystem keep 4640s working past 10,000 hours as a matter of routine — the structural reason this flagship still trades as a tool, not a trophy.

Used Price Range in Canada (2026)

The 4640 trades in a deep, work-priced market — dozens of active listings across MarketBook, AgDealer (Saskatchewan and Alberta dealers included), and auctions:

• Projects, tired units, unknown drivetrains: roughly CAD $10,000–$16,000
• Honest workers — Quad-Range, higher hours, functioning climate control: roughly CAD $16,000–$25,000 (Canadian anchor: a 1981 QR with 2,000 hours on its overhaul, cold A/C, and a good interior at $22,500)
• Strong units — documented overhaul, duals, triple remotes, refreshed interior: roughly CAD $25,000–$38,000 (anchor: a farmer-retirement QR with 42-in. duals and an all-new interior at $34,900)
• Exceptional one-owner, low-hour, or fully reconditioned tractors: CAD $38,000–$48,000+

Value movers, in order: transmission health (tested, not claimed), overhaul documentation, duals and remote count, climate-control function, and interior condition. Hours move price less here than anywhere else in this guide — the market has learned to buy the paperwork.

Best Use Cases in Canadian Conditions

Grain-farm support (SK / AB / MB). Grain carts, heavy harrows, land rolling, and seeding support on 155 PTO horses and an 83-gallon day. Heavy tillage. Big discs, chisels, and cultivators within the Category 3 hitch’s honest capacity. Silage and big hay. 1,000-rpm harvesters, big mowers, and heavy cutters — the PTO was sized for exactly this. Mixed operations needing one big tractor. The cheapest dependable 150-plus horsepower in the used market. Not ideal for: 540-rpm implement fleets, small fields and yards, loader-first duty (weight and 2WD geometry), or buyers who won’t verify a transmission before paying.

Maintenance & Service

• Daily: engine oil, coolant, both air elements, tire pressure, grease points — and radiator/intercooler airflow on hot-work tractors
• Turbo-diesel discipline: oil and filters on schedule; idle-down after heavy pulls; investigate new smoke immediately
• Fluids: genuine JD Hy-Gard (or true equivalent) everywhere the wet drivetrain touches — Quad-Range, Power Shift, brakes, and diff lock all depend on it
• Fuel housekeeping: water separator drained, filters dated, tank kept honest — 83 gallons hides sins
• Cold-start system: ether metering inspected before winter; block heater as the primary strategy; batteries load-tested
• Cab systems: A/C serviced (R-134a conversions common), bushings and seals maintained — the cab is a priced asset

Parts support is industrial-grade: the 466 family, wet drivetrains, and Sound-Gard components remain in continuous Deere, reman, aftermarket, and salvage supply.

Where to Find a Used John Deere 4640 in Canada

Supply is steady through MarketBook and AgDealer (Prairie dealers prominent), consignment auctions, and farm retirements — filter out the GreenStar 4640 display listings that share every search. Inspection priorities, in order: test the transmission under load before anything else — every range and step on a Quad-Range, every gear on a Power Shift; read the overhaul paperwork and reconcile it with blow-by, oil pressure, and the tach’s story; run all SCVs and the hitch warm; confirm the 1,000-rpm PTO engages cleanly and your implements match it; inspect the ether system and ask how winters were started; grade the cab as its own asset (climate control, bushings, interior); and walk the duals, hubs, and front-end for the weight this tractor carries. A documented-overhaul Quad-Range with duals, triple remotes, and working climate control is the Prairie buy-once 4640 — and the reason this flagship still leaves auction yards under its own power, headed back to work.

John Deere 4640 FAQ

How much horsepower does a John Deere 4640 have? 155 HP at the PTO (rated, Nebraska-tested in 1978) from the 176-engine-HP turbocharged-and-intercooled 466. Listings quoting 160, 172, or 185 HP describe the same tractor via engine or dyno figures.

What years was the John Deere 4640 made? Model years 1978–1982 in Waterloo, Iowa, as the row-crop flagship of the Iron Horses 40-series — successor to the 4630, replaced by the 4650.

Does the John Deere 4640 have a 540 PTO? No — it’s 1,000-rpm only, with the large 1-3/4-inch shaft. Farms running 540-rpm implements need to plan around that before buying.

Quad-Range or Power Shift on a 4640? Both are wet and proven: Quad-Range’s sixteen speeds for tillage and mixed duty, Power Shift’s clutchless shifting for silage and direction-change work. Condition beats configuration — test whichever box under load before money moves.

Is a 9,000-hour 4640 too worn to buy? Not by itself — the model’s market runs on documented overhauls, and a high-hour tractor with rebuild paperwork routinely outsells a vague lower-hour one. Buy the documentation and the load test, not the tach.

How does a 4640 start in a Canadian winter? Factory ether injection is the cold-start aid — effective when the metered system is intact and used per the manual. The Prairie practice: block heater first, ether system inspected as backup, winter fuel, strong batteries.

Is this the same 4640 as the John Deere display? No — the GreenStar 4640 Universal Display is modern precision-ag electronics that happens to share the number and clutter the classifieds. This page covers the 1978–82 tractor.

What is a John Deere 4640 worth in Canada? As of 2026: roughly CAD $16,000–$25,000 for honest working Quad-Range units, $25,000–$38,000 for documented-overhaul tractors with duals and fresh interiors, and $38,000–$48,000+ for exceptional examples — with projects below $16,000.

What replaced the John Deere 4640? The 50-series John Deere 4650 in 1983; within its own era, the 4840 sat above it as the Power-Shift-only 180-horse flagship.

Related Models on Aglist

• John Deere 4230 — Generation II’s 100-horse formula, one era back
• John Deere 4320 — where Deere’s turbo row-crop story accelerated
• John Deere 4020 — the dynasty’s benchmark and value baseline
• All tractors on Aglist — full tractor coverage

Disclaimer

Specifications compiled from John Deere technical literature and Nebraska Tractor Test Laboratory data (1978), cross-checked against reference and market sources; the 4640 was offered with two transmissions, optional hydraulic front-wheel drive, and hitch-capacity options, and the current market prices documented engine-overhaul history above raw hour readings, which are frequently unreliable at this age. The John Deere 4640 is a discontinued model — availability is limited to the used market, and pricing reflects indicative Canadian ranges that vary by region, condition, configuration, transmission health, and documentation. Cold-start guidance reflects the factory ether-injection system operated per the operator’s manual. Reviews on Aglist are written by real users and moderated for spam — opinions are personal. Always confirm specifications and condition against the operator’s manual, a serial-number decode, and a thorough physical inspection — including transmission load-testing, hydraulic pressure checks, and cold-start system assessment — before committing to any specific machine.

John Deere 4640 Reviews & Ratings