Description

Dana Spicer T40000 Service Manual – Factory Rebuild Specs

I’ve got a stack of aftermarket manuals in my toolbox that belong in the trash. They guess at torque values, skip the inspection steps, and then you’re left holding a stripped housing wondering why the shift solenoid fried. If you’re working on a Dana Spicer T40000 Service Manual, you’re not rebuilding a lawnmower transmission. You’re inside a powershift box that pushes heavy equipment. You need the exact specs Dana wrote, not some third-party rewrite. This is the real thing – 160 pages, factory-issued, from the people who built it.

What the Dana Spicer T40000 Service Manual Covers

The Table of Contents starts where you should – Safety precautions (Section 1) and Cleaning, inspection and legend symbols (Section 2). Don’t skip Section 2.1.1 on bearing cleaning. I’ve seen guys cook a brand-new set of bearings because they didn’t read that page. Then Section 3 hits you with Technical specifications: weight, dimensions, oil capacity, and six subsections on tightening torques – lubricated threads, elastic stop nuts, O-ring ports, pipe plugs, suction screen, solenoid cartridges. You want the charge pressure? It’s in Section 3.4. Wire it wrong? Section 3.5 covers electrical specs. No guessing.

Torque Specs and Fluid Capacities

Section 3.3 is the page you’ll bookmark – Tighteen torques (that’s “tighten” in Dana’s old typesetting). It breaks out torque values for lubricated or plated screw threads and gives you the elastic stop nut torque. I’ve used those numbers on three rebuilds now, and not one leak. The fluid capacity spec is in Section 3.2. Don’t trust the dipstick if you don’t know the correct oil type – Section 4.1 lists recommended lubricants. Follow the daily maintenance intervals in Section 4.2.1 or you’ll be back inside this thing sooner than you want.

Cleaning and Inspection Procedures

Section 2.2 shows you how to inspect bearings, oil seals, gaskets, gears, shafts, housings, and covers. The legend symbols in Section 2.3 save you time once you learn them. I’ve seen techs throw away a perfectly good housing because they didn’t know the crack symbol. Section 2.2.4 covers housing and cover inspection – match the cracks to the legend. Aftermarket manuals skip this. They tell you “replace if damaged.” Thanks, genius. The OEM manual shows you what damage looks like.

Troubleshooting Guide: Clutch Pressure and Overheating

Section 7 gets straight to the point – Troubleshooting guide. Low clutch pressure? Section 7.3.1 walks you through the stall test (Section 7.2.1) and pressure checks (7.2.2). Overheating? 7.3.3. Noisy converter? 7.3.4. Lack of power? 7.3.5. Every fault has a checklist in Section 7.4 – “Check points.” The wiring diagram is in 7.5. I printed that page and laminated it for the wall. You’ll use it.

Assembly Instructions: Taper Bearing Adjustments

Section 9 is where most rebuilds go wrong. The Low (1st) clutch taper bearing adjustments (9.1) come with plotting charts (9.2). You measure the bearing shim stack with those charts or you end up with a loose preload. Section 9.3 gives you the control valve bolt tightening sequence diagram – skip that sequence and you warp the valve body. Speed sensor bushing installation is in 9.4. Follow it exactly.

Installation Details: Converter Drive Coupling

Section 5 covers installation – converter drive coupling (5.1), transmission to engine procedure (5.2), and external plumbing with cooler line specs (5.3.1). If you’re swapping a T40000 into a different machine, you need those driveline angles and coupling specs. Don’t guess the hose size. The manual gives you the ID and pressure rating.

Source Authenticity – OEM vs. Aftermarket

This is not a copy of a copy. It’s the original Dana Spicer document, published under Dana Corporation copyright. The foreword states: “Only SPICER CLARK-HURTH approved parts as listed in the applicable parts manual should be used.” That’s not a suggestion. Aftermarket manuals will tell you “use equivalent parts” – that’s how you get a clutch pack that slips at 200°F. The OEM document lists the exact pressure specs, solenoid cartridge torques, and electrical wiring. If you’ve been burned by a generic PDF, start here.

I’ve linked other factory manuals below that belong on your bench – the Dana Spicer 1372-A Service Manual – Factory Specs & Rebuild Guide covers a different series, but the same Dana torque philosophy. The Dana Spicer ES60-5, CM59, ES60-5A, ES60-5C, ES60-5D Service Manual is a must if you work on those models. And the Dana Spicer ES46-5 ES56-5 2002 Service Manual – 40 Pages of Factory Specs is short but packs the critical data. For understanding transmission basics, check Wikipedia on Manual Transmission design – but for the T40000, this manual is your only source.

FAQ – Two Questions You’ll Ask

Does this manual cover the MHR section?

Yes. Section 11 covers Options, including the MHR section with its own assembly and disassembly instructions.

I’m rebuilding the clutch packs. Which torque specs do I need from Section 3.3?

You need the elastic stop nut torque (3.3.2), the “O”-ring port plug torque (3.3.3) for the hydraulic connections, and the solenoid cartridge torque (3.3.6). The solenoid torque is critical – too tight cracks the valve body, too loose leaks pressure. Also check Section 9.3 for the control valve bolt sequence. That section covers the torque sequence, not just the value. Do not skip the sequence; the valve body will warp if you torque the bolts in the wrong order. The manual gives you the pattern diagram.

You don’t guess with a T40000. You get the factory data, follow the steps, and use the right tools. Access the Factory Manual.