What is the Volvo I-Shift?
Volvo I-Shift is an automated manual transmission family. Gear count depends on the version: Volvo’s current North American VNR specifications list 12- and 13-speed configurations. Identify the installed gearbox model, generation and engine pairing before applying those specifications to a used truck.
How do I-Shift versions differ?
Volvo describes I-Shift for Severe Duty as a 12-speed automated manual for construction and heavy-haul work. It separately describes I-Shift with Crawler Gears for very low-speed manoeuvring and steep-grade starts. A truck advertised simply as “I-Shift” does not necessarily have either configuration.
What should you check on a used I-Shift truck?
Ask for the gearbox identification and build sheet, then match them to the engine rating, axle ratio and intended work. Request records of clutch, actuator and transmission repairs, including any later replacements. Have a qualified Volvo service provider review the identified truck; a current brochure cannot establish its condition or approve a different application.
What matters in a comparison
For an I-Shift vehicle, ask for the exact gearbox model and generation, then compare it with the engine’s torque package and rear axle. If low-speed or auxiliary work matters, have those requirements reviewed against the specific build. Service history and clutch-related work should accompany a used-truck evaluation. Do not transfer current brochure features automatically to an older truck.
Fluids & filters
North American VN/VHD/VAH I-Shift reference, December 2023 body-builder guidance; later generations require their own service instructions.
Reference checked:
Identify the unit first
Use these details to match the manufacturer's application record before choosing a fluid or ordering a filter.
- Full I-Shift AT/ATO model and serial number
- Transmission design generation and build date
- Radiator-mounted versus other oil cooler
- Original filter part number and housing
Fluid specifications
Transmission lubricant
Volvo-approved synthetic I-Shift oil SAE 75W-80 (97307/97318 reference).
Standard configuration with brass drain plug, and radiator-mounted coolers. Volvo’s product sheet excludes ATO overdrive; if gearbox and cooler indications conflict, obtain VIN/serial-specific Volvo approval before filling.
Source 1 ↗ Source 2 ↗Transmission lubricant
Volvo-approved synthetic I-Shift oil SAE 75W-90.
HD configuration with silver drain plug; not for radiator-mounted coolers. Confirm exact AT/ATO variant and generation.
Source 1 ↗Filter numbers & cross-references
A catalogue cross-reference links part numbers. It does not confirm that either part fits every version of this model. Match the original part to the unit first, then check the replacement manufacturer's application and any supersession.
Transmission-oil filter element
Cross-reference only: first confirm that OE 20779040 is the correct service filter for this I-Shift model, serial and housing. The catalogue link proves the part-number mapping, not fitment for every I-Shift.
Application not established by this cross-reference. Confirm this original part number in the manufacturer’s parts catalogue for the exact model and serial number before considering an alternate.
Source 1 ↗Manufacturer catalogue cross-references
- Baldwin PT9417Check catalogue ↗
Official service and parts reference ↗
What still needs unit-specific confirmation
- Volvo’s family product sheet and body-builder cooler exception cannot determine every installed AT/ATO combination. Confirm the service fluid by VIN and transmission serial when specifications conflict.
- Current filter supersession and later I-Shift generations require the Volvo parts catalogue.
Official service and parts references
Source 1 ↗ Source 2 ↗ Source 3 ↗ Source 4 ↗Follow the current manufacturer's manual for the identified unit. This page does not set a drain interval, fill quantity or repair procedure.
Questions to take to the supplier
- Which I-Shift model and generation are installed?
- How many forward ratios does this configuration provide?
- What engine and application approval support the pairing?
Sources & limits
Manufacturer references support the model facts. Our examples and comparisons are editorial interpretation prepared with AI assistance, not road tests or an expert inspection.
Check the year, market and exact build before applying a specification. This guide does not authorize parts fitment, repairs, modifications or loading.
Published specifications and examples retain their labelled units; the header preferences apply to calculators.
Editorial method & reference limits · Report a correction