Description

Isuzu Q Series 2011 Workshop Manual – Propeller Shaft & Axle

You’ve got a Q Series truck in the bay with a driveline vibration or a leaking hub seal. Before you reach for the parts cannon, get the factory data. This Isuzu Q Series 2011 Workshop Manual packs 106 pages of the exact service information Isuzu issued for the propeller shaft and axle system. Not a reprint from some third-party site that copied torque specs off a blurry 1990s photocopy. I’ve been an ASE Master Technician for 28 years, and I can tell you that the difference between a job that holds and a comebacker is often the difference between using the correct fixing torque and guessing. This manual gives you those numbers straight from the source.

Every section here is built around real shop work. The Troubleshooting chapter alone, starting on page 00-2, lists common problems like worn spider bearings or center bearing failure with exact correction steps. Vibration from the propeller shaft? It tells you exactly which component to check and replace. Rear axle noise? Same deal. No vague “inspect and replace as needed” nonsense – you get the possible cause and the correction.

Propeller Shaft Troubleshooting: Vibration and Noise Diagnosis

The manual splits troubleshooting into two clear paths: Propeller Shaft and Rear Axle. For the shaft, it lists worn spline yoke, worn or stuck spider bearing, and worn center bearing as primary suspects – each with a specific replacement instruction. If you’ve ever chased a vibration across three different shops, you know how valuable that is. The section also includes on-vehicle service procedures for both long wheel base and short wheel base models, so you don’t have to guess which shim or yoke fits your chassis.

Fixing Torque Tables – Propeller Shaft, Hubs, and Differentials

Torque specs are the backbone of any axle job. This manual devotes pages 00-7 through 00-13 to nothing but fixing torque tables. You get separate tables for the propeller shaft, front hub and brake drum (4×2 model), front axle knuckle and king pin, rear hub and brake drum (single tire and dual tire models), and both differential assemblies (244 mm and 292 mm). Each table gives you the fastener location and the required torque in Newton-meters. For a 4×2 front hub, you’ll find the exact value to tighten the castle nut – no more “tighten until it feels right.” Street torque wrenches don’t lie, and this manual makes sure you use the right number.

Isuzu Q Series 2011 Workshop Manual: Service Information Section

The Service Information chapter (Section 00) pulls together all the critical data before you start swinging wrenches. Main data and specifications, service standards, servicing procedures, the fixing torque tables, and a special tools list for propeller shaft, rear axle, and front axle. If you need to know the backlash spec for a 292 mm differential, it’s in the Service Standard table. If you’re wondering which puller to rent, the Special Tools section lists the OEM tool numbers. This isn’t a generic “use a three-jaw puller” suggestion – it gives you the factory tool reference so you can order the right one or find a cross-reference.

Does This Manual Cover the Front Axle Assembly?

Yes. Section 4C covers the front axle for 4×2 models – both single tire and dual tire configurations. You get a general description of the hub, knuckle, and king pin, then on-vehicle service procedures for front hub and brake drum removal, front axle assembly, and knuckle and king pin service. The fixing torque table on page 00-9 covers the knuckle and king pin bolts. If you’re rebuilding a front end, this is the only reference you need.

3 Sub-Sections for the Rear Axle: Hub, Drum, and Differential

The rear axle section (4B) is the thickest part of this manual. It covers hub and drum service for single tire (full floating) and dual tire models, rear axle assembly removal, and differential carrier assembly repair. Two differential sizes are covered: the 244 mm and the 292 mm. For each, you get unit repair procedures with bearing preload settings, ring gear backlash specs, and torque values for the differential case bolts. The manual doesn’t skip the difference between single tire and dual tire rear hub torque specs – the tables on pages 00-10 and 00-11 are separate, so you don’t accidentally use the wrong value.

Need the brake drum torque specs for a 4×2 front hub? Page 00-8 has them. The brake section isn’t here – that’s a separate manual – but the hub and drum service covers the mechanical side of the brake interface. For complete brake hydraulics, check the 2011MY Isuzu Q Series Workshop Manual – Brakes. If you’re dealing with electrical issues on the cab or chassis, the ISUZU 2011MY Q SERIES CAB AND CHASSIS ELECTRICAL WSM covers that. The full Isuzu 2011MY Q Series Workshop Manual includes all systems.

This manual is for anyone working on a 2011 Isuzu Q Series – independent shop techs, fleet mechanics, and serious DIYers who own a torque wrench and know how to use it. If you’re servicing the propeller shaft, rear axle, or front axle, you need this. The Q Series often uses a Manual Transmission paired with these axles, so understanding the driveline is essential. For context on the broader commercial vehicle industry, see Automotive Industry Overview.

Does this manual cover the full vehicle or just the axle section?

It covers only the Propeller Shaft and Axle section.

Are torque specs in imperial units?

The fixing torque tables list values in Newton-meters (Nm), which is metric. For North American shops that work in ft-lb, keep a conversion calculator handy or memorize the common conversions – 100 Nm is roughly 74 ft-lb. The manual specs are factory-original; don’t convert them incorrectly or you’ll strip threads. I always write the ft-lb equivalent next to the Nm value in my own copy. The pages from 00-7 to 00-13 are the only source for these numbers – aftermarket copies often mis-copy the decimal point.

Is this manual for single tire or dual tire models?

Both. It includes separate subsections for single tire (full floating) and dual tire models, with distinct torque specs for each hub and drum configuration.

How do I know if my Q Series is a 4×2 model?

Check the VIN or the badge on the fender; the front axle section applies only to 4×2 models.

Stop relying on forum posts and secondhand data. Get the factory manual that thousands of shops use to keep these trucks on the road. Access the Factory Manual today.