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Thread: Allison or 4L80e in 2500's

  1. #1

    Allison or 4L80e in 2500's

    I can't seem to find a straight answer to this?? Was the allison an option on the 2500's or just the 2500 hd's? Do all 2500's come with at least a 4l80e?

  2. #2
    Join Date
    Feb 2007
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    Fort Worth
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    Yes, all 2500 trucks have the 4L80e. 2500HD trucks have either the 4L80e when hooked up to a gas motor, or the Allison when hooked up to the diesel.

    2000 ECSB 6.0L
    TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's

  3. #3
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    Quote Originally Posted by txarkitekt View Post
    Yes, all 2500 trucks have the 4L80e. 2500HD trucks have either the 4L80e when hooked up to a gas motor, or the Allison when hooked up to the diesel.
    The allison trans is also behind some gas big blocks as well, in the HD trucks.

  4. #4
    Join Date
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    Quote Originally Posted by farmtruc View Post
    The allison trans is also behind some gas big blocks as well, in the HD trucks.
    I was thinking that some of the 8.1L motors had the Allison behind them, but didn't wanna say that cause I was not 100% sure. Thanks for the confirmation.

    2000 ECSB 6.0L
    TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's

  5. #5
    Thanks guys!

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