4.10 diff
From : kg
Q: hey guys what benefit is there to having the 4.10 rear w/ posi vs. the 3.55 if any besides quicker off the line. thank you for your input. kevin g. .
Replies:
From : bob
kg wrote hey guys what benefit is there to having the 4.10 rear w/ posi vs. the 3.55 if any besides quicker off the line. thank you for your input. kevin g. applies more torque to the ground. the same physics principle that makes it quicker off the line helps it to tow/haul heavy loads. -- ..bob 1997 hd fxdwg - turbocharged! 2001 dodge dakota qc 5.9/4x4/3.92 1983 gmc jimmy - mountain beater 1966 mustang coupe - daily driver 1966 ffr cobra - ongoing project .
From : mac davis
on tue 27 jul 2004 011703 gmt kg kevin@thekgplumbingheating.com wrote hey guys what benefit is there to having the 4.10 rear w/ posi vs. the 3.55 if any besides quicker off the line. thank you for your input. kevin g. it sucks a lot more fuel on the freeway but pulls hills a lot better... mac .
From : trey
mac davis wrote on tue 27 jul 2004 011703 gmt kg kevin@thekgplumbingheating.com wrote hey guys what benefit is there to having the 4.10 rear w/ posi vs. the 3.55 if any besides quicker off the line. thank you for your input. kevin g. it sucks a lot more fuel on the freeway but pulls hills a lot better... mac think of it as a 13% gain in power 13%drop in gas mileagedue to a 13% higher cruising rpm. as for posi vs open the posi makes for more tire ware in the turns if your on the gas like a right trun from a red light or a u trun for most street use like freeway cruising it reallt doesnt make a difference. if your driving in snow ice mud dirt moss boat ramp. then the posi would be helpful since if one drive wheel loses traction you wont lose both driving wheels through the open diff. however driving with a posi can also be rather exciting. when it rains and the ground is just a little wet and i hit the gas a little too hard or if the wheels are on pain in the road both wheel will spin as the ass end of the truck slides down the crowned road towards the curb. with an open diff only one wheel would spin and the other would just sit there holding it from sliding sideways down the crowned road. i would like to get a arb air locker so i have an open dif on the pavement and a locked diff off road. .
From : ramworker
can someone with 4.10 in a diesel with the 6spd post what kind of fuel economy your getting ive got a 2001 3500 4x4 6 speed 4.10 ratio eth/dee combo all stock no bombs yet getting 17.75 hand calculated the computer thinks about 18.8 mpg commuting 90% freeway at 60 mph. i dont have any recent trip figures. robert .
From : mac davis
on tue 27 jul 2004 181608 -0600 idaspode not@icehouse.net wrote this assumes rpm/mpg are linear which they may not be. a lower ratio rear end may allow a person to stay in a higher gear in some situations and actually give better efficiency. case in point was when i put larger tires on my 91 f150 31/10.5/15. over a period of time i calculated a 6% difference between indicated speed/distance over stock tires. if your theory were correct i should have enjoyed a 6% increase in fuel mileage which i did not. there were plenty of times when i could not pull 5th gear od and had to drop down to 4th cuts way into the mpg... another consideration is what type of driving you do... or racing is thats why you go to a 410... most folks that go lower in a full size pickup see a small gain in mpg in town / stop & go driving because the lower gears get the weight of the truck moving more efficiently.. mac .
From : idaspode
on tue 27 jul 2004 155818 gmt trey treydog90spam@hotmail.com wrote what benefit is there to having the 4.10 rear w/ posi vs. the 3.55 if any besides quicker off the line. thank you for your input. kevin g. it sucks a lot more fuel on the freeway but pulls hills a lot better... mac think of it as a 13% gain in power 13%drop in gas mileagedue to a 13% higher cruising rpm. this assumes rpm/mpg are linear which they may not be. a lower ratio rear end may allow a person to stay in a higher gear in some situations and actually give better efficiency. case in point was when i put larger tires on my 91 f150 31/10.5/15. over a period of time i calculated a 6% difference between indicated speed/distance over stock tires. if your theory were correct i should have enjoyed a 6% increase in fuel mileage which i did not. there were plenty of times when i could not pull 5th gear od and had to drop down to 4th cuts way into the mpg... as for posi vs open the posi makes for more tire ware in the turns if your on the gas like a right trun from a red light or a u trun for most street use like freeway cruising it reallt doesnt make a difference. if your driving in snow ice mud dirt moss boat ramp. then the posi would be helpful since if one drive wheel loses traction you wont lose both driving wheels through the open diff. however driving with a posi can also be rather exciting. when it rains and the ground is just a little wet and i hit the gas a little too hard or if the wheels are on pain in the road both wheel will spin as the ass end of the truck slides down the crowned road towards the curb. with an open diff only one wheel would spin and the other would just sit there holding it from sliding sideways down the crowned road. i would like to get a arb air locker so i have an open dif on the pavement and a locked diff off road. dude get yourself a spell checker and a grammar book. i count 9 mistakes in the above paragraph. it would make your posts much easier to read. tire ware u trun pain in the road reallt doesnt what is happening in our schools obviously not much in the english department... g dj dew knot trussed yore spiel chukar! .
From : trey
idaspode wrote on tue 27 jul 2004 155818 gmt trey treydog90spam@hotmail.com wrote what benefit is there to having the 4.10 rear w/ posi vs. the 3.55 if any besides quicker off the line. thank you for your input. kevin g. it sucks a lot more fuel on the freeway but pulls hills a lot better... mac think of it as a 13% gain in power 13%drop in gas mileagedue to a 13% higher cruising rpm. this assumes rpm/mpg are linear which they may not be. a lower ratio rear end may allow a person to stay in a higher gear in some situations and actually give better efficiency. case in point was when i put larger tires on my 91 f150 31/10.5/15. over a period of time i calculated a 6% difference between indicated speed/distance over stock tires. if your theory were correct i should have enjoyed a 6% increase in fuel mileage which i did not. there were plenty of times when i could not pull 5th gear od and had to drop down to 4th cuts way into the mpg... very true since at the same rpm the engine could be working 13% easier. there are a lot of other factors to think about. i was looking at the bmws on the bmw web site hey i can dream cant i i found it odd to see that the 330 actually got better gas mileage then the 325 3.0 i6 vs. 2.5 i6 but since the bigger engine was geared differently to take advantage of the higher power it is able to cruise at a lower rpm thus using less fuel. if the two cars were geared the same the 330 would get worse mileage. what this has to do with anything i dont know. i was looking at the diesel trucks on the dodge site dreaming once again and was debating weather of not to opt for the 4.10 gears of keep the 3.73 gears i will not be towing much and spend a good amount on the freeways between 60-80 mph but i also go off-roading a lot and would like the lower gearing for some of the terrain i will be traversing... i also commute on a motorcycle so i will not be driving the truck every day on the freeway maybe just once a week. can someone with 4.10 in a diesel with the 6spd post what kind of fuel economy your getting as for posi vs open the posi makes for more tire ware in the turns if your on the gas like a right trun from a red light or a u trun for most street use like freeway cruising it reallt doesnt make a difference. if your driving in snow ice mud dirt moss boat ramp. then the posi would be helpful since if one drive wheel loses traction you wont lose both driving wheels through the open diff. however driving with a posi can also be rather exciting. when it rains and the ground is just a little wet and i hit the gas a little too hard or if the wheels are on pain in the road both wheel will spin as the ass end of the truck slides down the crowned road towards the curb. with an open diff only one wheel would spin and the other would just sit there holding it from sliding sideways down the crowned road. i would like to get a arb air locker so i have an open dif on the pavement and a locked diff off road. dude get yourself a spell checker and a grammar book. i count 9 mistakes in the above paragraph. it would make your posts much easier to read. tire ware u trun pain in the road reallt doesnt what is happening in our schools obviously not much in the english department... g eye is a produckt ove da publick skule sistem! i am using oe-q fix and it fubars the spell checker and i forget to manually run it. tire ware = tire wear oops u trun = u-turn oops pain in the road = paint in the road typo reallt doesnt = really doesnt typo thats what happens when everything is blurry when i am posting ;- dj dew knot trussed yore spiel chukar! .
From : greg surratt
on wed 28 jul 2004 010039 gmt trey treydog90spam@hotmail.com wrote can someone with 4.10 in a diesel with the 6spd post what kind of fuel economy your getting i cant answer your question specifically but i tow a 12000 lb fiver a couple times a year. the rest of the time the truck is a daily driver 19 miles one way to work. i opted for the 3.54 rears and get 17.5 solo about 75% freeway driving at 65 mph around 1850 rpm. when im towing i get about 14 running in direct at 60 mph around 2200 rpm. greg 98 3500 qc 4x2 cummins isb auto 3.541 driftwood with leather and all the heavy duty options. 89 nu-wa champagne edition 34 foot fifth wheel. .