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  3. GM TRUCKS 15659718

GM TRUCKS 15659718 Transfer Tcase

fits model: 2500, Sp, 4x4, 4wd, Sierra. make: Gmc. year: 1988–1994.

15659718 Gm Trucks 1988-1994 Gmc Sierra 2500 Transfer Case Assembly Oem 4x4 4wd Tcase 5 Sp Mt

( Brand: Gm Trucks ), ( Manufacturer Part Number: 15659718 ), ( Part Type: Transfer Case ), ( Id: C2e07d9b-af4c-4bfa-b1a5-ec7fcf3a2d6e ), ( Interchange: 412-372 ), ( Year: 1993 )

Review GM TRUCKS Gmc Transfer Case Assembly Oem Tcase Mt fits SIERRA 2500 SP 4X4 4WD 1988–1994

The GM 15659718 transfer case is specifically designed for 1988-1994 GMC Sierra 2500 trucks with 4x4 and 4WD systems. This transfer case is an essential component of the vehicle's powertrain, responsible for distributing engine power to the front and rear axles when four-wheel drive is engaged.

This transfer case features a robust and durable design, with a strong cast iron housing that protects against damage and wear. It also includes a heavy-duty chain-driven system for power transfer, ensuring smooth and efficient operation.

The GM 15659718 transfer case includes a two-speed design, which allows the driver to select between high and low range gearing. This feature is particularly useful when driving in challenging terrain or when towing heavy loads. The low range gearing provides increased torque and power for climbing steep inclines or navigating rough terrain.

Additionally, this transfer case includes a shift-on-the-fly feature, allowing the driver to engage four-wheel drive while on the move. This is accomplished through a dash-mounted switch, making it convenient and safe to switch between two-wheel drive and four-wheel drive modes.

The GM 15659718 transfer case is also designed for ease of maintenance, with easily accessible service points and filters. The unit includes a drain plug for easy oil changes, as well as serviceable internal filters for extended longevity.

Overall, this transfer case is a reliable and robust component for any 1988-1994 GMC Sierra 2500 4x4 or 4WD system. Its durable design, efficient power transfer, and convenient features make it an essential upgrade for those who regularly drive in challenging terrain or tow heavy loads.

The 1988-1994 GMC Sierra 2500 with a transfer case for 4x4 and 4WD (TCase SP) is an older model pickup truck that has its unique advantages and disadvantages for potential buyers. Here's a brief analysis of each:

Advantages:

1. Reliability: Older trucks like the GMC Sierra 2500 are known for their durability and reliability. The heavy-duty 4x4 system and the robust transfer case make this truck suitable for off-road conditions and rough terrains.

2. Cost: Older models are generally more affordable than their newer counterparts. This can make the GMC Sierra 2500 an attractive option for buyers on a budget.

3. Customizability: Older trucks are easier to modify and customize. The availability of aftermarket parts and the large community of enthusiasts can help owners personalize their trucks to their preferences.

Disadvantages:

1. Maintenance: Older vehicles require more frequent maintenance than newer models. The GMC Sierra 2500 may need more attention in terms of regular maintenance and potential repairs.

2. Fuel Efficiency: Older trucks are not known for their fuel efficiency. The larger engine and heavy-duty 4x4 system can consume more fuel than modern trucks.

3. Technology: The GMC Sierra 2500 does not come with the latest technology features. This may not be a concern for buyers who prefer a more traditional driving experience, but it can be a disadvantage for those who value modern conveniences.

Conclusion:

The 1988-1994 GMC Sierra 2500 with a transfer case for 4x4 and 4WD (TCase SP) is a reliable, durable, and affordable option for buyers looking for an older pickup truck. Its heavy-duty 4x4 system and robust transfer case make it suitable for off-road conditions and rough terrains. However, potential buyers should be prepared for the increased cost of maintenance and the lack of modern technology features.

Recommendation:

If you're looking for an older pickup truck for off-road adventures or heavy-duty tasks, the 1988-1994 GMC Sierra 2500 with a transfer case for 4x4 and 4WD (TCase SP) could be an excellent choice. However, it's essential to consider the additional cost of maintenance and the lack of modern technology features before making a purchase. It's also recommended to have the truck inspected by a trusted mechanic to ensure its overall condition and reliability.

Details:

GMC PICKUP 2500 SERIES 88 w/o TH700. Search for more parts GMC PICKUP 2500. GMC PICKUP 2500 SERIES 89-94 MT. CHEVROLET PICKUP 2500 SERIES 89-94 MT.

part #: 15659718 price

  • $43.89

specifications othellodrivetrain:

  • for models: 2500, Sp, 4x4, 4wd, Sierra
  • for makes: Gmc
  • for years: 1988-1994
  • brand: Gm Trucks
  • mpn: 15659718
  • part type: Transfer Case
  • id: C2e07d9b-af4c-4bfa-b1a5-ec7fcf3a2d6e
  • interchange: 412-372
  • year: 1993

shipping othellodrivetrain:

  • transit: 2-6 Days
  • cost: $0.00
  • service: Standard
  • type: Fixed
  • class: Standard

returns othellodrivetrain:

  • policy: Returns Accepted
  • paid by: Seller
  • time: 30 Days

seller othellodrivetrain:

  • city: Brush, Colorado
  • rating: 99.2%
  • # reviews: 13562

payments othellodrivetrain:

  • other
  • credit card: Diners-club
  • wallet: Google-pay

general othellodrivetrain:

  • Car Truck Parts Accessories > Transmission Drivetrain > Other Transmission Drivetrain
  • condition: Used

offer othellodrivetrain:

  • started: January 7, 2026
  • sold: 0
  • best offers: True
  • quantity: 1
  • availability: In Stock
  • options: Ship-to-home
for models: 2500, sp, 4x4, 4wd, sierra, for makes: gmc, for years: 1988-1994, part type: transfer case, id: c2e07d9b-af4c-4bfa-b1a5-ec7fcf3a2d6e, interchange: 412-372, year: 1993,
category: auto parts > car truck parts accessories > transmission drivetrain, sku: 11710432447965632,

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2 offers $43.89–$43.89 USD
  • Offer #1: $43.89 price + $5.89 shipping estimate = $49.78* total.+$5.89 shipping
  • Offer #2: $43.89 price + $5.89 shipping estimate = $49.78* total.+$5.89 shipping

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