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  #1  
Old 06-03-2013, 09:46 PM
dotram01 dotram01 is offline
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Default Gear Change

I have a 01 Ram 1500 4x4 w/ 5.9 it has 3.55 gears and is weak at pulling and needless to say it sucks the gas. I want to know if I changed the gear ratio to the 3.92 in the front and rear would this help with the towing issue or would I just make the gas stations richer without any change.
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Old 06-03-2013, 11:50 PM
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Mine does pretty good powerwise with 4.10's and 33's. I only get 10-11 city and 12-14 highway. Most I've ever gotten was 14.8.

Only way I'd consider it is if you found some good axles cheap. I'd probably upgrade to a Dana 60 front and Dana 70 rear like the 2500's have if I was gonna do it.
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Old 06-05-2013, 09:11 AM
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Most important question needing answered is....what kind of towing load you doing?

Are you within the GVWR tow rating of your truck? Payload max is like 1000 lbs and towing is like 5-7000 lbs depending on gear ratio.
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Old 06-05-2013, 09:32 PM
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Hey guys, thanks for the input. As far as the question on towing, I pull a 28' travel trailer about 3 times a year. The trailer weighs in at about 6800 lbs. The truck is running 265-75-16s , I really don't want to go any bigger on the tires , but even when not towing the truck is very sluggish on take off at stop lights. That is some of the reasons I was wondering about the gear change.
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Old 06-05-2013, 11:27 PM
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With the 6800 lbs you cited, it appears you have some margin on the tow rating.

http://dodgeram.info/2001/towing-charts.html

Regearing to 4.10s would give you some pep for towing in keeping that tire size. With no trailer, expect your mpg to go down a bit as a result.

When was the last time you did a tuneup (plugs, cap, rotor, wires)?

What is the condition of your intake manifold plenum gasket?

How many miles?

Any issues with the exhaust system like the catalytic converter and O2 sensors?

Last cleaning job of the entire throttle body?

Need to describe what the "sluggish" means more in detail.
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Old 06-06-2013, 06:50 PM
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The motor has 112,472 , the engine had a complete tune up about a year ago or around 7000 mi. No codes or anything has come up about the O2 or anything else. Not sure about the plenum gasket , it has no leaks , so I assume it's OK. What I mean as for the sluggishness is that the truck on take of is very weak until the RPMs get up to about 1500 or so. So I just thought it might be geared to high. So you don't think the 3.92 gears would be worth the trouble, instead go to 410s
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Old 06-07-2013, 12:06 AM
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From take off being sluggish are you talking when pulling the trailer? Or you talking unhooked and empty?
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Old 06-07-2013, 08:42 PM
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No not just pulling the camper, but everyday driving.
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Old 06-09-2013, 07:38 PM
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You are looking at $300 just for the ring and pinion per axle. Not to mention the shims and everything. Probably close to a grand, once you're said and done without labor.
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Old 06-11-2013, 09:59 AM
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Quote:
Originally Posted by dotram01 View Post
The motor has 112,472 , the engine had a complete tune up about a year ago or around 7000 mi. No codes or anything has come up about the O2 or anything else. Not sure about the plenum gasket , it has no leaks , so I assume it's OK. What I mean as for the sluggishness is that the truck on take of is very weak until the RPMs get up to about 1500 or so. So I just thought it might be geared to high. So you don't think the 3.92 gears would be worth the trouble, instead go to 410s
Quote:
Originally Posted by dotram01 View Post
No not just pulling the camper, but everyday driving.
If you have a code reader, then I'd suggest you put one on and see if there are any pending codes. Codes being activated don't always trigger the CEL. A code doesn't have to appear for a sensor to be bad.

I'm going to make some suggestions since there isn't enough information here to make a more complete diagnosis. So again, these are suggestions and based on the info so far.

I highlighted your reply about the plenum gasket. Honestly, I don't think you know at all it's condition. A couple symptoms about a bad plenum gasket are: sluggishness, oil consumption (> 1 qt over 3000 mile interval), missing, stumble, poor start. These don't all have to occur simultaneously.

Here is a TSB about it for info. Can you try to do the "Diagnosis" part?

http://dodgeram.info/tsb/2000/09-05-00.htm

After you've done that, I encourage you to take the entire throttle body off and look down into the intake manifold. If you have a magnet stick, then check and see if it attaches to the pan. What does the oil consistency look like in there? Look from the middle of pan towards the back of the motor.


Going through the above will provide a greater assurance of determining the condition of the plenum gasket.


As for regear, cost can vary based on the shop you go to and the parts you choose. I've seen quotes range from $800 to $1500. As Persuader said, it is roughly $300/r&p, then ~$140/master install kit, then just the labor which is dependent on the shop guy. Generally good idea to get parts from same place doing the install. Make sure you get details of what parts they use (i.e., sierra, yukon, superior, spicer, etc.) and warranty. If there is a problem and you get parts elsewhere to save money, then labor will just blame the parts and won't take ownership.

Or look for an Offroad Edition ram that is getting rid of it's axles. They came with factory 4.10s.
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