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Superior | 4F27E / FNR5 Kit
Superior | 4F27E / FNR5 Kit

Superior | 4F27E / FNR5 Kit

This Shift Correction Package offers regular and heavy duty applications in one package. The Superior 4L60-E kit helps prevent premature wear of the forward sprag. Improves overall performance and shift quality. Converts lock-up to an on/off system to help stop the TCC slippage code.

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The upadated Multi-Unit kit now covers the five-speed Ford FNR5 and Mazda FS5A-EL transmissions. The 4F27E kit includes Superior's patent pending billet 1-2 and neutral/ drive dual sealing ring accumulator pistons. This kit also contains one of our patent pending Accumulator Buddy brushes so no other tools or fixtures are required. The pistons and brush allow you to reuse previously discarded cases that would not have sealed due to premature ware. The 4F27E kit also includes a , stronger solenoid pressure regulator valve spring to replace the frequently broken stock spring
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