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Old 08-30-2005, 09:38 AM   #15
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I have a friend that tows a 34ft Alpin-Lite 5er
with a 2001 Dodge 3/4 ton Cummins, Automatic with 3:55 gears. Flat land he does good at 65mph
getting 11.5 mpg in O/D.

He took a trip to his dads house in Parkersburg WVA. He said he needed 4:10's for that trip. Now, he's running stock at 235hp. He had overheating problems on some of the hills on WVA Turnpike. He stayed in second gear most of the time on the hills he did not get a good head start on.

I tow at almost max depending on the load inside the trailer with a stock Cummings and 6speed. My last trip up that direction I only used 4th gear once. Fifth was used alot. I too
need 4:10's which is about the best HP increase you can get without increasing hp.

I waiting to see how long it takes for the MEGA Cab dulley to come out. If it looks like a long time I will most likely buy a 2005 next year and put the 4:10's in it if it does not have them.

Dave
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Old 08-30-2005, 09:58 AM   #16
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by CoastalDav:
He had overheating problems on some of the hills on WVA Turnpike. </div></BLOCKQUOTE>Then I daresay one or more of the following is the case:

He has not relocated the oil breather overflow bottle located on the left front of the engine. Vapors from this bottle get sucked up around the edge of the fan shroud and, when mixed with dirt, will pack the radiator. The radiator won't necessarily look that dirty from the back side, but the hidden front side (facing the intercooler) will be filthy. The best way to clean it is to pull it.

Alternatively, he could have a sticking thermostat. Some of the early 24 valve trucks did, but I wouldn't expect it on a 2001. If he changes it out, get a genuine Cummins replacement.

The other factor is that he needs to keep his torque converter locked up. Fluid shear in an unlocked torque converter adds a lot of heat load to the engine cooling system through the transmission fluid cooler located in the passenger side radiator tank. An auxiliary transmission cooler placed in the hot line between the transmission and tank cooler can alleviate a lot of this heat load. That's another reason why (for an automatic) a transmission temperature gauge is a critical addition for heavy towing.

Rusty
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Old 08-30-2005, 12:45 PM   #17
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I am dead on 2000 rpm at 65 mph with 4:10s on overdrive. I am towing a little under 8000lb .I really have to watch myself,the truck does'nt feel the load.We are looking at toy hauler 5th wheel over the winter with weights in the 14000lb range loaded,with a few mods I am not that worried .
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Old 08-30-2005, 01:00 PM   #18
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4.10 is what my labels say. I beleive it's under the hood. It's not called a limited slip anymore, but something similar. Can't think of the word right now.
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Old 08-30-2005, 01:01 PM   #19
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I also have an auto with od. That's when it's in od.
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Old 08-30-2005, 01:05 PM   #20
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Yep, 6th is an OD with the manual as well - the ratios are very close between the manual and automatic. 1900 RPM in OD at 70 MPH is typical for 3.54 gears. 2300-2350 would be typical for 4.10s under the same circumstances.

Did you buy the truck used? A lot of people who don't tow swap their 4.10s for 3.54s - I wonder if that may have happened to your truck?

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Old 08-30-2005, 01:13 PM   #21
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I don't think so. i got it from someone who was towing a 5'er allready, so i can't see him swapping doing that. I'll look again tonite.
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Old 08-30-2005, 01:26 PM   #22
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Roll it forward 1 revolution of the rear wheels and count how many revolutions the driveshaft makes.

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Old 09-01-2005, 05:04 PM   #23
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Mine is over 12k and I run 70-5 up I89 thorough NH & VT without pushing it hard. Everywhere I've been, I've been able to keep up with traffic. That's nontowing traffic.
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Old 09-01-2005, 06:37 PM   #24
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Thats the kind of input I was looking for. Any idea what your total combined weight is?

Now how about some input from some other poor stock smucks like me with the flatland 3.73s.

thanks Tim K
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Old 09-06-2005, 09:05 PM   #25
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My dodge 3500 12 valve dually diesel stock ran real slow up the hills this last weekend with my 5er at around 12k pounds. I was out of overdrive and she started heating up. Am I pulling too much weight. What can I do in the low end money department to get more power.
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Old 09-07-2005, 07:59 AM   #26
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As you can see I have an 04.5 with 4:10 gears. I turn 2000 at 65. 65 is my selfimposed speedlimit towing my 10,000 lb. TT. That is where I feel most comfortable and if I go faster it starts useing a lot more fuel.
Your label may be wrong or the speedometer or the tach may be wrong. You just can't be turning 1900 at 70. My 2001 had the 3.54 gears and was turning 2000 at 70.

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Old 09-07-2005, 12:24 PM   #27
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I have 3.73 gears and turn right at 2000 rpm at 70mph. I wish I had the 4.10's on some of the hills though. John
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Old 11-02-2005, 03:37 PM   #28
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Go for it Tim, I ordered my '03 to pull in excess of 20,000# and I speced the 3:73 gears only because I couldn't get the 3:55 gears I wanted. That little 6 will do just fine, but better yet with a little help from Mark Chapple @ http://www.TSTProducts.com
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