OD lock out

Discussion in 'GM Duramax 6.6 (LB7)' started by Strokincowboy, May 3, 2007.

  1. Strokincowboy

    Strokincowboy Well-Known Member

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    the other day i had a 32' stock trailer loaded with 21 700# calves and a 1800# bull. I could build speed until it shifted into over drive. is there ne way I can lock out the over drive? It makes me mad cuz it will do good, until it shifts to od and it always varys sumtimes it will shift at 50 and sumtimes at 60. I think i could really move down the road if i can lock it out until about 65 then hit overdrive when the rpms are up there.
     
  2. 502_Jimmy

    502_Jimmy TRC Staff Moderator

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  3. kasl33

    kasl33 Member

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    Ok, you know the tow haul button on the end of the shift lever? Well, tap it to engage tow/haul mode. To lock out overdrive, hold that button for about 3 seconds.
     

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