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Financing Options Available With Affirm | Buy Now, Pay Later!

Allison 2001-03 LB7 5-6 Speed Conversion For GM Duramax - Core Included In Price A1-6VB-TCM-LB7

Original price $3,655.00 - Original price $3,655.00
Original price
$3,655.00 - $3,655.00
Current price $3,655.00

Part Number: A1-6VB-TCM-LB7

**Core Charge Included In Price**


The Sun Coast A1-6VB-TCM-LB7 Allison 5-6 Speed Conversion for your 2001-2003 GM 6.6L Duramax LB7 converts your 5-Speed Allison A1000 Transmission into a 6-Speed like the later models. With the conversion, you can drop 325 engine rpm @ 75 mph with 3.73 gears. While increasing fuel economy 1 _ 1.5 MPG, reduces engine noise while cruising, a truck with 3.73 gears that normally likes cruising at 62 MPH will now cruise nice at 72 MPH. The gear ratio in your 5 speed is .71 and our 6th gear will be .61. 6th gear can be disabled with your two haul button and 5th canceled with OD off. Requires valve body and TCM change. No wiring, no modifications required.


  • Converts 5-Speed Automatic To 6-Speed
  • Decrease Cruising RPM's
  • No Wiring, No Modifications Required