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Transfer Case Adapters
A transfer case adapter can fill the gap between the output of your transmission and the input for your transfer case.
When you’re assembling a custom driveline...
A transfer case adapter can fill the gap between the output of your transmission and the input for your transfer case.
When you’re assembling a custom driveline for your off-road rig, you may find that the new combination of chassis and transfer case doesn’t line up like the factory intended. Most transfer case adapters let you retain the stock location for the transfer case by extending the output shaft of the transmission.
To help you find the right adapter for your application, Summit Racing Equipment’s website lets you filter hundreds of applications by transfer case model (Atlas, Dana, Landcruiser,...
A transfer case adapter can fill the gap between the output of your transmission and the input for your transfer case.
When you’re assembling a custom driveline for your off-road rig, you may find that the new combination of chassis and transfer case doesn’t line up like the factory intended. Most transfer case adapters let you retain the stock location for the transfer case by extending the output shaft of the transmission.
To help you find the right adapter for your application, Summit Racing Equipment’s website lets you filter hundreds of applications by transfer case model (Atlas, Dana, Landcruiser, Toyota, Borg Warner, etc.) and by transmission type (4L60E, Torque Command, 700R4, New Venture, etc.).
Top Brands
Summit Racing wants to make sure your transfer case adapter isn’t a weak link in your new off-road driveline. Summit only partners with trusted manufacturers like Advance Adapters, FTI Performance, and Trail Gear, so you can shop with confidence!
Transfer Case Adapter Kit *4L60E HEX TO NP231 21 SPL.
Part Number: ADD-50-0431
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, TH350 Transmission, NP231, Pre-1993 Transfer Case, Kit
Part Number: ADD-50-6804
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter Kit DODGE NV4500/NP231 23TH KIT
Part Number: ADD-50-0204
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, SM465 2WD Transmission to Jeep NP231 23-Spline Transfer Case, Kit
Part Number: ADD-50-9812
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, TH400 Transmission, NP231 23-Spline Transfer Case, Kit
Part Number: ADD-50-6403
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, Mopar, Torque Command Transmission, NP231 29-Spline Transfer Case, Kit
Part Number: ADD-27-0011T
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, TH350 Transmission, NP231 23-Spline Transfer Case, Kit
Part Number: ADD-50-6307
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, New Venture 4500 Trasmission, NP231 Transfer Case, Kit
Part Number: ADD-50-0212
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, 4L60E Transmission, NP231 Transfer Case, Kit
Part Number: ADD-50-0402
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, TH400 Transmission, NP231 23-Spline Transfer Case, Kit
Part Number: ADD-50-6402
Not Yet Reviewed
Estimated Ship Date: Jun 29, 2026 if ordered today
Estimated Ship Date: Jun 29, 2026 if ordered today
Transfer Case Adapter, GM, TH350 Transmission, NP231 Transfer Case, Kit
Part Number: ADD-50-6308
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, 700R4 Transmission, NP231 23-Spline Transfer Case, Kit
Part Number: ADD-50-9102
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, 700R4/4L60 Transmission, NP231 21-Spline Transfer Case, 1987-1994, 23 Spline, Kit
Part Number: ADD-50-9103
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
*NP231(23T)/GM V8 KIT (DODGE)
Part Number: ADD-27-0011
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, TH350 Transmission, NP231 Transfer Case, Kit
Part Number: ADD-50-6805
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, TH350 Transmission, NP231 21-Spline Upgrade to 23-Spline, Transfer Case, Kit
Part Number: ADD-50-6801
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, SM465 4WD Transmission to Jeep NP231 23-Spline Transfer Case, Kit
Part Number: ADD-50-9808
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
*AMC 4.0L NP231 NV KIT 29SPL.
Part Number: ADD-27-0012T
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, TH350 Transmission, NP231 Transfer Case, 1995 and Newer, 23 Spline, Kit
Part Number: ADD-50-6305A
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, TH350 Transmission, NP231 Transfer Case, 1987-1994, 23 Spline, Kit
Part Number: ADD-50-6305
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, TH350 Transmission, NP231 Transfer Case, Kit
Part Number: ADD-50-6306
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, TH350 Transmission, NP231 23-Spline Transfer Case, Kit
Part Number: ADD-50-6802
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, GM, 700R4/4L60 Transmission, NP231 21-Spline Transfer Case, 1995 and Newer, 23 Spl, Kit
Part Number: ADD-50-9103A
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2026 if ordered today
Estimated Ship Date: Jun 30, 2026 if ordered today
Transfer Case Adapter, Aluminum, Natural, Kit
Part Number: ADD-50-0435
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
