Heavy duty rear axle...

[Couchsachraga]

Does anyone know if all 3.92 ratio rear ends are the “heavy duty towing rear axle” (10” Dana super 60?), or if that is one version and there is also a 9.25” 3.92 ratio rear end?

 

[Dusty1948]

Does anyone know if all 3.92 ratio rear ends are the “heavy duty towing rear axle” (10” Dana super 60?), or if that is one version and there is also a 9.25” 3.92 ratio rear end?

All 4th generation Rams used 9.25 axles regardless of the axle ratio or the manufacturer (pre-2014s used American axle design, 2014 and up used ZF axles).

For 2019 all axle ratios are available with the ZF 9.25 ring & pinion gear sets, with the optional 9.75 ring & pinion set available only in 3.92 ratio with the Max Tow option.

Regards,
Dusty

2019 Ram 1500 Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, factory dual exhaust, 18” wheels. Now at: 003148 miles.

 

[Zeronet]

I believe the heavy duty rear axle and max tow package are only available on 4x2 Quad Cab versions of Tradesman, Big Horn and Laramie models. All other configurations offer the Trailer Tow Group which does not include the heavy duty axle. At least that’s my understanding.

 

[Couchsachraga]

I was second guessing myself having not ordered the tow package (I wanted the 360 camera and for my trailers (same width as the truck) can skip the extendable tow mirrors. I recalled a heavy duty axle option in the online configuration tool (see sig for truck specs), but only opted for the 3.92 ratio.
Having 8 weeks pass since ordering and still no built date allows for such things

 

[Dusty1948]

I believe the heavy duty rear axle and max tow package are only available on 4x2 Quad Cab versions of Tradesman, Big Horn and Laramie models. All other configurations offer the Trailer Tow Group which does not include the heavy duty axle. At least that’s my understanding.

And I believe that is correct, also.
Regards,
Dusty

2019 Ram 1500 Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, factory dual exhaust, 18” wheels. Now at: 003153 miles.

 

[Couchsachraga]

Thank you both!

 

[Jordan2929]

All 4th generation Rams used 9.25 axles regardless of the axle ratio or the manufacturer (pre-2014s used American axle design, 2014 and up used ZF axles).

For 2019 all axle ratios are available with the ZF 9.25 ring & pinion gear sets, with the optional 9.75 ring & pinion set available only in 3.92 ratio with the Max Tow option.

Regards,
Dusty

2019 Ram 1500 Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, factory dual exhaust, 18” wheels. Now at: 003148 miles.

Do you know if eaton makes a trutrac rear diff for this axle?

 

[Dusty1948]

Do you know if eaton makes a trutrac rear diff for this axle?

Sorry, I do not.

Best regards,
Dusty
2019 Ram DT 1500 Silver Billet Laramie, Quad Cab, 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33 gallon fuel tank, 18 inch wheels. Build date: 17 July 2018. Now at 026292 miles.