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Help Support Hardline Crawlers :
Towing Gears w/o OD.
- Thread starter 1Bad67
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Not Jobless
Mr Funbags
I think you can get 3.18's for a Dana 80...check randy's website for the 14Bolt
Cascade_Crawler
Well-Known Member
3.23/3.21 is the highest gears you should be able to do. The 14 bolt rear limits you
thats close enough, it wont make any difference.:awesomework:
Your going to have that much difference in tire size
Lucky Jeff
Well-Known Member
just get bigger tires, problem solved.. Worked for me. But then I got lower gearing cause the tall gearing SUCKS while towing. And yes I tow with a diesel. Tall gearing is not going to help you.
might not matter... local 4x store says highest I can get is 3.42 for the 14 bolt. The highest I can get for the D44 is 3.54... I gave up before we found the highest matching gearset. I think your right Jeff... bigger tires.
Thanks all.
Thanks all.
So Jeff, what gears, tires size and RPM at 75 MPH are you runnin? I have 3.54's and 33's turn about 2400 at 75 which is good but am wonderin if I had 3.73's or 4.10's if I could keep it in OD more? but I am concerned about runnin the engine up to 2800 for long periods?
Friends of mine have newer CTD's and they all have 3.73's and stock 265's or 31's and can run OD on steeper grades than me...I like the lower RPM though?
Anyone else feel free to ad input
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Not Jobless
Mr Funbags
70mph, stock tires, 3.54's, 6th gear (NV5600) I'm turning 2000rpm...at 75mph I'm at about 2200 or 2300.
Cascade_Crawler
Well-Known Member
4.10s, with 315/75/16s I can cruise at 70 which is about 2050-2100 RPM. I try to keep it right there to avoid sucking fuel. 95 CTD
OK after reading these I realized I'm a retard, I turn 1800-1900 at 75 with mine, and am curious about turning up to 2500 all day, obviously Brad, since yours has what 265's on it your RPM are higher and you have no problem with that?
When I pull a steep grade of 6% or more I kick it out of OD and I turn right at 2500 at 65 MPH and usually still have some pedal left. EGT's stay under 1100 but what if that was up to 2800?
When I pull a steep grade of 6% or more I kick it out of OD and I turn right at 2500 at 65 MPH and usually still have some pedal left. EGT's stay under 1100 but what if that was up to 2800?
Lucky Jeff
Well-Known Member
I started to worry less about RPM and more how the truck acted. It seemed that towing down the freeway with 3.55's and 35's was great. But it'd drop me down on the hills because of the heat. Didn't matter if I dropped it to 4th and ran at 2500. Still had heat problems. After the 4.10's those problems were taken down a couple notches. And even moreso when I added the towing twins.
In my opinion.. 3.54's with 33's. 3.73's with 35's and 4.10's with 37's.. Doing freeway speeds (70-75) i'm over that good mileage area just barely.
In my opinion.. 3.54's with 33's. 3.73's with 35's and 4.10's with 37's.. Doing freeway speeds (70-75) i'm over that good mileage area just barely.
Nuzzy
Well-Known Member
Whew, that makes way more sense than your first numbers! I was plumb cornfusald :haha:
I turn 24-2500 all day here at 75. 4.10s and stock 31s ish. When I was towing in WA I'd hardly ever kick out of OD and when I did was usually associated with passing people on the passes.
Of course my tranny with the high cap pan and torque lock never seems to reach "operating temp" even when towing :eeek:
*edit* I do suck the fuel down at that RPM though :booo:
Not Jobless
Mr Funbags
Mine never gets that high in the RPM range while towing...only when screwing around :redneck:
When my truck is turning about 2600rpm I'm doing over 90mph...
Lucky Jeff
Well-Known Member
that's odd.. I am easily into redline at 100.
Lucky Jeff
Well-Known Member
you can run 4500 all day long :redneck: . I've only had mine to 3700 though. Don't have enough fuel to carry me further.. Going over 3k is pretty much an every day thing though for my truck.
