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- Prevents 3rd gear starts and trouble codes in Allison 1000/2000/2400 units
- Low return rate OE spring combined with flashing or wear ridges may cause valve sticking
- Bore sizing tool 37000-02BST improves bore finish for smoother valve operation
- Stronger spring helps prevent valve binding
- Reconditioning bore and installing Sonnax spring ensures optimal valve performance
- Addresses common concerns related to sticking E-shift valve