3.21 gear set?
#1928200
10/08/15 07:23 AM
10/08/15 07:23 AM
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Joined: Aug 2007
Posts: 2,356 Kentucky
dfsmopars
OP
top fuel
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OP
top fuel
Joined: Aug 2007
Posts: 2,356
Kentucky
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What are the thoughts on a Ram with 3.21 gears in a four door, 4x4, with either a 6 speed or 8 speed trans behind a Hemi? Talking 2013, 2014 or so years. The objective is fuel economy but not a dog. Rarely pull a trailer but on occasion could hook up an open car hauler with a 2 ton car. Current ride is a '02 5.9 quad cab with 3.55 gears. I like the '02 but tired of the poor fuel mileage, cracked dash and rust.
‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring ‘14 Big Horn, Quad Cab, 4x4, 1500
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Re: 3.21 gear set?
[Re: dfsmopars]
#1928333
10/08/15 01:28 PM
10/08/15 01:28 PM
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Joined: Jan 2003
Posts: 4,696 enfield, CT
ViperDave
master
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master
Joined: Jan 2003
Posts: 4,696
enfield, CT
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I have a 2014 tradesman crew cab 5.7/8spd 3.21 on 35" tires.
Just towed a 90 d250 cummins truck about 70 miles last week on an open steel deck trailer. Power was fine, trans temp and oil temp stayed right where they normally are, did about 70 mph up and down the hills.
67 Dart GT Vert 273/904 72 Town & Country 440/727 90 D350 reg cab dually cummins 15 Scat Pack Challenger
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Re: 3.21 gear set?
[Re: dfsmopars]
#1928388
10/08/15 02:49 PM
10/08/15 02:49 PM
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Joined: Jan 2005
Posts: 12,408 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,408
Kalispell Mt.
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Mopar claimed about 10% better miledge when they came out with the hemi, of course the trucks got huge-er at the same time. The wind drag from being so huge is going to hurt MPG as the speed goes up. I would not worry about power with the 3.21 gear as they dropped 1st gear ratio a lot also so take take off TQ will still be more you just get a better final drive ratio by having the higher rear gear.
One time I re-built one of those 5.7s for an 04 ram that coughed out a rod for no reason and we degreed the cam (stock cam we degreed mostly out of curiosity)and decided we should advance it one tooth and holy moly throttle response was waaaay better after that! I do not remember the numbers we came up with but figured it could only help and boy did it, the thing is now hyper responsive. We did end up with a CEL for cam/crank correlation or something similar but that truck is very responsive and quick for a 4 door 4x4. That was pretty much the only mod on the truck besides a crappy dual exhaust installed by previous owner. Really makes me want to put my 5.7 in my dakota but I already lose sleep worrying about the wiring.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 3.21 gear set?
[Re: dfsmopars]
#1928856
10/09/15 08:00 AM
10/09/15 08:00 AM
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Joined: Aug 2007
Posts: 2,356 Kentucky
dfsmopars
OP
top fuel
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OP
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Joined: Aug 2007
Posts: 2,356
Kentucky
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I have yet to find a Laramie model with an 8 speed. Did they make them for 2013 or 2014? All the trucks I have seen so far are six speed console shifts.
‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring ‘14 Big Horn, Quad Cab, 4x4, 1500
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Re: 3.21 gear set?
[Re: dfsmopars]
#1928892
10/09/15 10:31 AM
10/09/15 10:31 AM
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Joined: Jun 2008
Posts: 1,822 Colorado
denfireguy
top fuel
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top fuel
Joined: Jun 2008
Posts: 1,822
Colorado
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I have yet to find a Laramie model with an 8 speed. Did they make them for 2013 or 2014? All the trucks I have seen so far are six speed console shifts. 2013 and a half or about February, 2013 is the best I can determine 8 speed availability. That is what I found when I was looking for mine. Did find a 2013 with an 8 speed but two days later found a 2014 so I bought it instead. The truck had only 3000 miles on it. As far as I know, all 2014 Laramies have the 8 speed. As you probably know, the dash selector knob is the tip off. Craig
2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado
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