An Engineer's Ultimate Guide To 3.21 VS 3.92 Axle Ratio

[Fbird]

well I guess the 4.56's i put in my OLD truck just ain't worth talking about....lol

 

[Dewey]

well I guess the 4.56's i put in my OLD truck just ain't worth talking about....lol

Your the only REAL man here.

 

[HSKR R/T]

Your the only REAL man here.

I have 4.10s in my Dakota, what's that make me.

 

[OneEmmanuel]

I have 4.10s in my Dakota, what's that make me.

They/Them

 

[silver billet]

well I guess the 4.56's i put in my OLD truck just ain't worth talking about....lol

What transmission do you have? Because if you have a 65rfe with a 4.56, the zf 8 speed + 3.21 still has a much deeper first gear for off the line grunt, while offering a taller overdrive for better MPG, and more gears to choose from all around.

There is 0 benefit from your setup over and above a 5th gen with 3.21's. Even if you ran 4.89's you'd still well behind a 3.21 5th gen in every area.

The math:

 

[Ramroo]

well I guess the 4.56's i put in my OLD truck just ain't worth talking about....lol

I had a 2005 power wagon with 4.56.

It did not like cruising fast. Replaced the driveshaft to try to eliminate the vibrations at speed.
Helped a little, thinking the original was out of balance. Still, it or me didn’t like much over 65 mph.

Maybe why now they are 4.10.

 

[Fbird]

What transmission do you have? Because if you have a 65rfe with a 4.56, the zf 8 speed + 3.21 still has a much deeper first gear for off the line grunt, while offering a taller overdrive for better MPG, and more gears to choose from all around.

There is 0 benefit from your setup over and above a 5th gen with 3.21's. Even if you ran 4.89's you'd still well behind a 3.21 5th gen in every area.

The math:

View attachment 163354

It was my previous truck an 02 F-150 on 36"s that died a horrific death that's how I ended up in my NTM 21 RAM BH. The 4rw70 with a .70 OD was plenty comfortable...still cruised 85 mph...topped out at 136 (yes I had a programmer) and would "skeet" 2nd gear if I wanted to ( a pr of 36" coopers sound weird...skeeting 2 nd gear...yeah I built the tranny too)

 

[Idahoktm]

I was talking to this guy a few minutes ago. He's taking his dryer in for repairs. He could have used his 2020 Ram 1500 with 3.21 gears, but didn't want to risk smoking his transmission, so he loaded it up on this tandem trailer and hauled it in with his bike.

Smart man.

 

[Eighty]

I was talking to this guy a few minutes ago. He's taking his dryer in for repairs. He could have used his 2020 Ram 1500 with 3.21 gears, but didn't want to risk smoking his transmission, so he loaded it up on this tandem trailer and hauled it in with his bike.

Smart man.

View attachment 164232

At least the guy knows something about hooking up trailers that exceed the payload capacity. Look at the Trailer Toad he’s using.

 

[TNRamGuy]

I was talking to this guy a few minutes ago. He's taking his dryer in for repairs. He could have used his 2020 Ram 1500 with 3.21 gears, but didn't want to risk smoking his transmission, so he loaded it up on this tandem trailer and hauled it in with his bike.

Smart man.

View attachment 164232

And he is beating the Ford by a nose!

 

[theblet]

I was talking to this guy a few minutes ago. He's taking his dryer in for repairs. He could have used his 2020 Ram 1500 with 3.21 gears, but didn't want to risk smoking his transmission, so he loaded it up on this tandem trailer and hauled it in with his bike.

Smart man.

View attachment 164232

A bike with 3.92s. Go figure!

 

[Dewey]

A bike with 3.92s. Go figure!

He’s the smartest of all. He’s got multiple rear gear selections and can easily change on the fly to match conditions.

 

[Mountain Whiskey]

I was talking to this guy a few minutes ago. He's taking his dryer in for repairs. He could have used his 2020 Ram 1500 with 3.21 gears, but didn't want to risk smoking his transmission, so he loaded it up on this tandem trailer and hauled it in with his bike.

Smart man.

View attachment 164232

He knows his trucks limitations. He'll get there faster too.

 

[theblet]

He knows his trucks limitations. He'll get there faster too.

if he gets some MT tires, he can cut through the fields and make even better time!

 

[Mirowpl]

I drive a 2020 big horn with 3.21 gear’s BUT I identify as a TRX. So that is all that matters

 

[theblet]

I drive a 2020 big horn with 3.21 gear’s BUT I identify as a TRX. So that is all that matters

that's ok. What’s bad is when TRXs identify as bighorns with 3.6 engines and get to race against them, steal trophies, break 3.6 records, and get praised for it.

 

[c3k]

Funny...but I pay the neighbor's kid to help me get my truck (3.21 gears, natch) out of my driveway. He's got a nice 10 speed bike, better than the one pictured above. When I'm ready to go, he grabs my door handle and starts peddling. Once I'm up to speed (about 5-10 mph) he lets me go. He goes off to play, I go to work.

It's not a pain once you get used to it.

I -do- get great mileage though.

 

[SnowBlaZR2]

I was talking to this guy a few minutes ago. He's taking his dryer in for repairs. He could have used his 2020 Ram 1500 with 3.21 gears, but didn't want to risk smoking his transmission, so he loaded it up on this tandem trailer and hauled it in with his bike.

Smart man.

View attachment 164232

Dude needs a diesel Super Duty.

 

[Bigzway]

That would be harder to tow than the dryer to take into the ford dealership for repair

 

[SnowBlaZR2]

That would be harder to tow than the dryer to take into the ford dealership for repair

Good stuff.

Maybe Ram will get their **** together on the HD trucks.