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3:21?---> 3:55

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Old 06-30-2010, 08:44 AM
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Default 3:21?---> 3:55 gearing.

correct me if i am wrong, but with the stock v6 swb ram the rear gears are 3:21? that being said if i have those i want to go to 3:55 gears. where would i go to get all the parts needed to do this swap? what do i need? is this possible without redoing my hole rear end? just want a tad more towing and get-up. and 3:55 is the stock gearing for v8 ram half tons. (correct me if i am wrong)

edit* would i be better off getting a whole new (new to me) rear end off a v8 half ton ram from like a junk yard or somethin? or would that involve a new driveshaft?
 

Last edited by Bubba39047; 06-30-2010 at 08:51 AM.
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Old 06-30-2010, 09:19 AM
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completeoffroad.com and ringpinion.com has what you need. You need the ring and pinion + install kit.

3.55 would be quite noticeable compared to 3.21 but do you have the stock 245/75/16 tires? you might want to go to a 3.92 gear but I don't know if that would make a v6 rev too high or not.

A rear end out of a junk yard would be a good bet if you could pop the cover off and inspect the gears first and if it was less than 300$.

Look at the sticker on the inside-front of your hood or in the glove box and you'll see what gears you have. If you don't have one of those stickers then look at the rear axle and there should be a sticker on one end right next to the inside edge of the drum that has the gear ratio on it.
 

Last edited by Sheriff420; 06-30-2010 at 09:21 AM.
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Old 06-30-2010, 09:24 AM
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my stock tire size is 225/75/16 i am runnin 245/70/16. i dont want to go higher than 3:55's because i do travel some and i dont wanna be at 3k rpm to maintain 65mph
 
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Old 06-30-2010, 09:26 AM
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ok, i just checked my glove box. and what do ya know, i have 3:55?
 
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Old 06-30-2010, 09:44 AM
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I would think that the rpms would be really close with 3.92 gears and 245/70/16 tires compared to 3.55 gears and 225/75/16 tires.
 
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Old 06-30-2010, 09:46 AM
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well no way in hell im goin to those dinky ole tires. it had 265/75s when i bought it. im gonna put 255/70s, or 265/70s when i buy new ones soon. that website has 3:90 ring and pinion set. what if i was runnin 265/70s? would it be helpful then?
 
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Old 06-30-2010, 09:52 AM
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3.90 is the same with 265/70 as 3.55 with 245/70 power wise.
 
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Old 06-30-2010, 10:22 PM
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i'll see what my mpg's do when i get them new tires. if it goes down by 4 mpg i may do somethin
 
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Old 06-30-2010, 10:36 PM
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Just get a 318.....that will solve your accelleration problems.
And you can mount your 265's on it too.
 
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Old 06-30-2010, 11:25 PM
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i really want to. im gonna try and sell this in may and get an extended cab. if i can im just gone throw a 318 in it. i tryed racin my friends cummins earlier and i hit 5600 rpms and cut off hahaha
 


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