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theportuge 09-24-2009, 06:30 PM I just bought a mint stock 1994 Suburban 6.5 with 410 gears. What RPM are you guys running while you are towing? In 3rd gear(for towing) going 55 I was at 2800..is this normal with 410s? Also I need help with the best upgrades for more power. mrsemi05 09-24-2009, 06:45 PM with the 4L80E (your tranny) OD is okay and with the dually its about 2200 at 70 IIRC Green Machine 09-24-2009, 06:55 PM When I haul, I keep it in OD unless I'm in town or in hills. What you want to make sure is that it doesn't continue to shift in and out of OD. When it does that stay in 3rd... I have 3.73s :D theportuge 09-24-2009, 07:05 PM When I haul, I keep it in OD unless I'm in town or in hills. What you want to make sure is that it doesn't continue to shift in and out of OD. When it does that stay in 3rd... I have 3.73s :D Towing in OD? My RPMs do drop in OD. I called a trany shop and they told me to never tow in OD. mrsemi05 09-24-2009, 07:09 PM thats cause they dont know the chevy ones. i read a manual some where on it and it says to tow in OD theportuge 09-24-2009, 07:11 PM thats cause they dont know the chevy ones. i read a manual some where on it and it says to tow in OD Thanks...what about power upgrades? chris4521 09-24-2009, 07:13 PM you can tow in OD with our transmissions. with 4.10s and 265/75/16 tires i normally sit around 23-2400 at 70mph theportuge 09-24-2009, 07:49 PM you can tow in OD with our transmissions. with 4.10s and 265/75/16 tires i normally sit around 23-2400 at 70mph Thanks for your help.. | ||