14 Ram 1500 4x4. 8sp vs 6sp

[fireguard]

I'm leaning towards getting a new 1500 to flat tow behind my motorhome and tow my 21' toyhauler.
I would get the quad cab, s/b, 4x4 with Hemi.
What are the advantages of the 8 sp? My understanding is that it gets about 2 mpg better mileage. Is there any advantage while towing and is it worth the extra money to upgrade to the 8sp?
Thanks

 

[h2oman]

When you are towing you will be in tow/haul. So, you'll never be in 8th gear. When not towing the 8th gear will help with mileage which is always a good thing.

 

[jcat]

8spd hands down. Everything I see about the 645RE points to it being a time bomb. The 8hp70 is rated for far more torque and built by ZF, who know a thing or two about building good drivetrain components.

 

[toofart]

I don't think you can even get the 6sp in a 2014 1500.

 

[ExpressRules]

I don't think you can even get the 6sp in a 2014 1500.

I have a 2014 1500 with a 6 speed.

 

[Caldwell]

8spd + 3.92's = amazing combo.

 

[myoung84]

The 8 speed is an awesome transmission. I own two Vehicles with the Hemi and 8 speed and they are a great combo. Definitely get the 3.92s if you'll be towing. The 6 speed is not a bad transmission, but keep in mind it was first introduced in 1999 as a 4 speed. There have been minor updates (including a programming change that created a 5th gear), but it's virtually the same transmission that's been used for over 15 years. It's not even a 6 speed, that's just some bad marketing...

 

[S2kiHemi]

8 speed is the only way to go.

 

[WhiteExpress]

I agree with the consensus here. I would opt for the 8 sp.
In general, I've been under-impressed with every Chrysler transmission I've ever owned / driven. The 8 sp is NOT built / designed by Chrysler.

 

[Andy578]

love the 8 speed + 3.92. bit weird using 4wd low tho since it wants to shift pretty much the second you touch the gas