Allison Transmission HD 4060 1999 Service Manual – 158-Page Official Document

Description

If you are working on an Allison Transmission HD 4060, HD 4060P, HD 4060R, HD 4060PR, or HD 4560 and you do not have the factory Service Manual on the bench, you are asking for comebacks. I have seen guys slap a reman clutch pack in one of these and wonder why the stall test fails. Nine times out of ten they skipped the selective shim procedure or ignored the cold-check fluid level. That is what this 158-page book stops. It came out of Allison’s own engineering group in 1999, revision 2, and it covers every inch of the Transmission — from the charge pump gear clearances to the output flange seal replacement.

This is not a reprint of some scanned third-party copy. It is the actual OEM publication that went to dealers. The page you are looking at includes the full Important Safety Notice and a list of warnings that could save your hands. I have seen a technician bypass the neutral cool-down check and cook a brand-new torque converter. The manual calls that out on page 3. You ignore it at your own risk.

Preventive Maintenance: Fluid Check and Clutch Pressure Specs

Chapter 2 covers everything from electronic fluid level checks to manual dipstick procedures. You get a cold check and a hot check procedure with specific dipstick markings shown in Figure 2-1. The manual does not let you guess. Table 2-3 gives main pressure and clutch pressure specifications in PSI. If you are doing a stall test or a neutral cool-down check, the steps are laid out with the exact temperatures and RPM windows. I have used this chapter to diagnose a bad P2 module on a school bus — saved the shop four hours of pulling the whole unit.

Need fluid capacity? Table 2-2 lists it in quarts. Filter change intervals are spelled out by hour classes. The fluid contamination section (2-11) shows you what to look for when the oil smells burnt or looks milky. That is the kind of field knowledge that keeps a transmission on the road and out of my bay.

General Overhaul Information: Tools and Torque Tables

Chapter 3 starts with a tool list. You will see Figure 3-2 showing special tools like the clutch spring compressor and the seal installer. Table 3-1 lists the HD 4000/B 500 special tools with part numbers. If you do not have the right puller, do not start the teardown. The manual warns about careful handling of the control module — electrostatic discharge can kill it. I have watched a guy zap a $1,200 ECU by wiping it with a shop rag. The manual covers that in section 3-4.

Torque specifications are in section 3-10. You get foot-pounds for every fastener: converter housing bolts, valve body bolts, PTO cover bolts. I have seen stripped threads on the rear cover because someone used an impact gun on a 1/2-inch socket. Page 26 gives you the numbers. Use them.

Transmission Disassembly: Step-by-Step Module Removal

Chapter 4 walks through removing the transmission from the vehicle first — disconnection locations in Figure 4-1. Then it breaks down the removal of externally mounted parts, speed sensors, control module, torque converter module, and all the clutch modules. Figure 4-13 shows the rotating clutch module removal sequence. Each figure has callouts for bolt sizes and orientation marks. If you have ever tried to pull a C3/C4 clutch module without the alignment tool, you know why this manual is worth the access. The book does not assume you have done it before. It shows you where the snap rings are and which side faces up.

Module Rebuild: Selective Shims and Pump Gear Clearances

Chapter 5 is where the heavy lifting happens. It covers the torque converter module, the charging oil pump module, rotating clutch, C3/C4, and main shaft module. Table 5-1 lists torque converter selective shims with thicknesses in inches. Figures 5-3 through 5-8 show how to measure gear-cavity depth, side clearance, tooth tip clearance — all with feeler gauges and depth micrometers. I rebuilt a P1 planetary using the wear limits from section 3-8 and the spring specifications from 3-9. The manual does not hide any tolerance. It gives you the numbers.

You also get the main shaft journal measurements in Figure 5-10. That is for checking runout on a shaft that might have been bent in a hard shift. Do not skip that step. A .002″ runout will chew up bushings in 10,000 miles.

Why This Manual Beats Aftermarket Copies

I have seen aftermarket manuals that say “torque to spec” without giving the spec. This one has the actual GM/Allison torque tables. The wiring diagrams are from the factory — not redrawn by a guy in an office. The diagnostic procedures reference the DDR tool (Diagnostic Data Reader) and specific flash codes. If you are using an aftermarket manual that tells you to “check continuity” without giving the pin numbers, you are wasting time. This manual gives you the connector views and the voltage ranges. That is the difference between a three-hour diag and a thirty-minute fix.

Check out the related manuals for other Allison models: Allison Transmission 3000 EVS 2005 Troubleshooting Manual 436 Pages”> and Allison HD 4060 MD 3060 2005 Troubleshooting Manual – OEM Specs”>. Also see the Allison 1000 & 2000 Product Family 2007 Service Manual”> for lighter-duty units. For background on how these transmissions differ from Manual Transmission”> systems, the external reference is worth a read — but for anything Allison, stick with the factory book.

Does this manual cover the B 500 series as well?

Yes. The manual covers HD 4060, HD 4060P, HD 4060R, HD 4060PR, HD 4560, and also the B 500, B 500P, B 500R, B 500PR models. All in one 158-page volume.

What torque values are listed for the converter housing bolts?

Section 3-10 covers all torque specs. The converter housing bolts are listed in foot-pounds. I do not have the exact number in front of me, but page 26 of the PDF has the full table. You need the manual open to see them — do not rely on memory.

Can I use this manual for troubleshooting electrical faults on the HD 4060?

Yes. Chapter 1 includes diagnostic procedures and references to the DDR tool. The manual also covers electromagnetic interference (section 1-11) and has wiring information for the electronic control unit. It is not a standalone electrical troubleshooting guide, but it gives you the factory test points and expected values. For deeper diag, get the Allison Troubleshooting Manual (see related manuals above).

Is the fluid level check procedure the same for the HD 4560P?

Yes. Section 2-5 covers the manual fluid level check for all models. The cold check and hot check procedures are identical across the HD 4060 and HD 4560 series. The dipstick markings in Figure 2-1 apply to all. Just make sure the transmission is at operating temperature (160-200°F) for the hot check.

Look, I have been turning wrenches for 28 years. You want to rebuild one of these correctly? You need the factory data. No aftermarket summary will tell you the selective shim thickness range or the exact way to measure gear cavity depth. Access the Factory Manual and put it on your tablet next to the torque wrench. Your transmission will thank you.