Transmission Support Bracket

$365.00 - $415.00
(1 review) Write a Review
SKU:
99917004-Base
Weight:
16.00 LBS
Shipping:
Calculated at Checkout

This Transmission Support Bracket Kit provides rear tailshaft support for manual or Allison automatic transmissions during engine conversions in heavy-duty trucks. The kit is available in two variations: Manual and Automatic.

Manual Kit Includes:

  • (1) Channel Plate
  • (1) Rear Support Plate
  • (2) Locking Clips
  • (2) Support Springs
  • Grade 8 hardware (bolts, washers, lock nuts)

Automatic Kit Includes:

  • (1) Support Spring
  • (1) Rear Support Plate
  • (2) Frame Mounting Brackets

Specifications:

  • Provides rear support for the transmission tailshaft
  • Suitable for various Peterbilt, Kenworth and other heavy-duty truck applications

Critical Fitment Note:

  • Manual Transmission Bracket (PN 99917004): NOT compatible with above-the-frame style exhaust systems. Only compatible with below-the-frame exhaust configurations.
  • Automatic (Allison) Transmission Bracket: Compatible with both above-the-frame and below-the-frame exhaust systems.

Important Note: Confirm your exhaust configuration and transmission type before ordering. The kit is not chassis-specific; verify fitment for your specific application.

1 Year

1 Review Hide Reviews Show Reviews

  • 5
    Rear transmission mount

    Posted by Jim on Apr 15th 2026

    Looks just like the picture shows, had to replace my worn out one and this fits exactly like the factory mount I pulled off.

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