Kicking myself for not buying the Hemi but considering the deal I got on my truck, oh well. Ill live. However I do need more towing power and I'm wondering if new gears will give me a boost.

Can anyone educate me here? can I swap the gears out to get more power when towing and if so what do I need? How will new gears affect my gas mileage both when towing and when I'm not towing?

 

What gears do you have now?

 

That's a good question. I don't really know. My truck is a 09 2wd 4.7L Crew cab SLE. I think its the 9.25 but I'm not certain.

 

9.25 is the size of the rear axle, which is correct for a 1500. The gears are probably a 3.55 if your really short on power. You can read in the 3rd gen section that a lot of guys swapped to 4.56 gears. Will definitely help with pulling. I have 3.92s and a hemi which works great for me.

 

Many on this forum have expressed satisfaction with the 4.7 towing capability. FYI - I had 4.10 ratio gears installed on my 4.7 Dakota and it was a noticeable improvement.

However, 4.10's are not going to get you and a trailer around a convoy of 18 wheelers on a 2 lane blacktop in under 15 seconds. Of course neither will the hemi.

 

QUOTE=05Dakotaho;2574507]Many on this forum have expressed satisfaction with the 4.7 towing capability. FYI - I had 4.10 ratio gears installed on my 4.7 Dakota and it was a noticeable improvement.

However, 4.10's are not going to get you and a trailer around a convoy of 18 wheelers on a 2 lane blacktop in under 15 seconds. Of course neither will the hemi.[/QUOTE]

Correct, it takes more like 17 seconds :icon_goofygrin

 

4.56 if you have 20" wheels and 33" tires. 4.10's if you have 17" wheels and 31" tall tires.
Also, a programmer like the Diablosport Predator will wake it up too. Up to 30rwhp on the Hemi. The 08-up 4.7 isn't a slouch. 310hp and 330lb/ft I believe.

 

some of the 2wd have 3.21 gears dont they? maybe thats why it has "no power"?

 

20" wheels and 35 x 12.5" tires.

 

4.56 at least with 35's.