In short, a 2008 Chevrolet Tahoe with four-wheel drive uses the NP246 transfer case (also commonly referred to as NV246). Two-wheel-drive models do not have a transfer case at all.
Overview: how the Tahoe’s transfer case fits into the drivetrain
The transfer case is a component that splits power between the front and rear axles and provides low-range gearing for off-road or low-traction conditions. For the GMT900-generation Tahoe (2007–2014), four-wheel-drive models are paired with the NP246 family of transfer cases, while two-wheel-drive models rely solely on the rear-drive system.
Drivetrain configurations in the 2008 Tahoe
Before listing specifics, note that the 2008 Tahoe could come in two main drivetrain configurations:
- 4WD models equipped with the NP246/NV246 two-speed transfer case.
- 2WD models that do not include a transfer case.
In practice, most four-wheel-drive Tahoes from this era use the NP246 transfer case, whereas the two-wheel-drive versions lack a transfer case entirely.
How to identify which transfer case your Tahoe has
To confirm the exact transfer case on your vehicle, use these identification steps:
- Inspect the transfer case for a stamped model code or a nameplate on the case itself; look for NP246 or NV246 markings.
- Consult your vehicle’s documentation or the build/option codes from the VIN or window sticker, which can indicate the transfer case type for 4WD models.
The most reliable method is the stamping or tag on the transfer case. For GMT900 4WD Tahoes, NP246/NV246 is by far the standard configuration.
Maintenance considerations
Regular maintenance helps ensure reliability. For NP246 transfer cases, follow the manufacturer’s guidance in your owner's manual, including routine inspections for leaks, proper fluid levels, and timely fluid changes at the recommended intervals.
Common issues and troubleshooting tips
Typical concerns on these transfer cases include trouble engaging 4WD, unusual noises when in 4WD, or a case that doesn’t shift properly into high or low range. If you notice any of these symptoms, have the transfer case and related components (actuator, linkage, seals) inspected by a qualified technician. Note that 2WD Tahoes are not affected by 4WD transfer-case problems unless they are converted or modified.
Summary
The 2008 Tahoe’s four-wheel-drive models use the NP246 (NV246) transfer case, a two-speed unit that enables low-range gearing. Two-wheel-drive models do not have a transfer case. Identification is typically done via stamping on the case or through vehicle documentation, and routine maintenance per GM guidelines helps prevent common issues.