RPM on HEMI with 3.21

[Pedja]

What should i see on the freeway at 65mph / Mine is almost 1900 !

 

[Rob5589]

You sure it has 3.21? Mine is about that at 80, stock tires.

 

[Bubba33]

I'm around 1500 at that speed.

 

[Pedja]

You sure it has 3.21? Mine is about that at 80, stock tires.

I am and it is 1750-1800 to be exact

 

[Rob5589]

I am and it is 1750-1800 to be exact

What tires are you running? And we're talking the new body Ram, hemi, auto trans?

 

[Pedja]

New body, 5.7 l hemi stock tires 8 speed tran.

 

[Willwork4truck]

thats weird

 

[Nails]

Weird should be at 1400-1500 area

 

[Wheeler]

Activate show current gear in cluster. Make sure you are shifting to 8th gear. Also make sure tow mode is off.

 

[Richard320]

As I posted in this thread

At 70 mph with 3.21 gears and 275/65R18 tires, closer to 1500 than 1750 so I'd call it 1600 RPM in 8th.

 

[Rob5589]

New body, 5.7 l hemi stock tires 8 speed tran.

The exact rpms with 3.92, 8th gear, 275/65 18 is 1789; 3.21, 8th gear, same tire is 1465, both at 65 mph. So, you either aren't running 65 in 8th or you have 3.92.

 

[Icecoldak]

I place my bet he has 3.92 gears--

 

[Pedja]

Activate show current gear in cluster. Make sure you are shifting to 8th gear. Also make sure tow mode is off.

It is showing 8th gear, tow mode off ,

 

[Pedja]

I place my bet he has 3.92 gears--

Nope, it is Bighorn 5.7L 3.21

 

[Pedja]

The exact rpms with 3.92, 8th gear, 275/65 18 is 1789; 3.21, 8th gear, same tire is 1465, both at 65 mph. So, you either aren't running 65 in 8th or you have 3.92.

Maybe they install 3.92 and window sticker state 3.21

 

[Rob5589]

Nope, it is Bighorn 5.7L 3.21

Simple way to know is to run the vin through, https://fcacommunity.force.com/RAM/s/equipment-listing

 

[Icecoldak]

Look over on the options side of your window sticker--see if it states 3.92 anywhere?

 

[WW2]

Has to have 3.92.... thats the only thing that makes sense..its not impossible that the wrong rear end was installed at the factory. Stranger things have happened

 

[Pedja]

Simple way to know is to run the vin through, https://fcacommunity.force.com/RAM/s/equipment-listing

I JUST CHACK AND IT'S 3.92 NOT AS THAY STATE ON THE WINDOW STICKER

 

[Rob5589]

I JUST CHACK AND IT'S 3.92 NOT AS THAY STATE ON THE WINDOW STICKER

The sticker, as you found, isn't always correct. Refer to the build sheet for an accurate configuration.