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Sonnax 37000-02 E-Shift Valve Spring for Allison 1000/2000/2400 Transmissions

Manufacturer

Picture for manufacturer Sonnax

Part Number

37000-02
9 reviews
Sale Price

$7.88

3 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Sonnax 37000-02 E-shift valve spring is a high-performance replacement spring designed to solve common sticking valve problems in Allison 1000, 2000, 2400, T1000, T2000, and T2400 series automatic transmissions. This upgraded spring features a higher spring rate than the OEM component, helping to prevent valve hang-ups that can cause transmission issues.

Key Features:

  • Higher spring rate than OEM for improved valve return performance
  • Helps prevent Code 872 and third gear starts caused by sticking E-shift valves
  • Addresses pressure switch stuck-on conditions
  • Solves E-shift valve sticking issues caused by weak factory springs
  • Designed to work with Sonnax bore sizing tool 37000-02BST for optimal results

A sticking E-shift valve in Allison series transmissions can be caused by excessive flashing on the valve body casting, an out-of-round valve bore, or low return spring rate. For best results, install this stronger Sonnax E-shift valve spring after resizing or realigning the bore to prevent valve hang-ups and restore proper valve operation.

First transaction with THMotorsports. It was seamless, smooth and quick.

Once again everything was as advertised.

It was good

Super fast ship and best price!

TIRE SHIPPED OUT PRETTY QUICK

Very good

Check selection of tires. Easy search to find the exact tires I needed. And they were shipped in perfect timing. Thank you.

Product was delivered quickly and it was exactly the part I needed. I will be ordering from them again.

Good product and speedy delivery

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