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Old 05-11-2015, 09:36 AM   #11
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You could also get a 3 speed manual with overdrive, which took a 4.10 in high and when it shifted into overdrive down to a 2.88. Had a 55 Chev with it and a new 64 Chevelle with a 3 speed and od. You could re-wire the od to have shift into od at any speed in any forward gear.
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Old 05-11-2015, 10:15 AM   #12
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OK guys Ram throw that all out the window in 2013.5 with the introduction of the new Ram improved 6.7L Cummins Diesel trucks for the 2500 and 3500 models.


Any truck built after 2013.5 MY which was Jan 1 2015 introduction date that is a single wheel has only one gear ratio available 3:42 regardless of transmission. The maximum trailer weight for towing will vary slightly depending on options and cab style along with transmission selected. The gross vehicle weight rating is 10,000 LBS for the 2500 and the 3500 SWR will be around 11,100 LBS. Only the DRW trucks will offer different gear ratios for the differential.


Also starting in 2015 these trucks are all certified to meet the SAE J2807 towing requirements with the same differential offering as in 2013.5 MY; thus the SRW trucks have keep the 3:42 gear ratio as the only offering.
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Old 05-11-2015, 10:35 AM   #13
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I just bought a new Ram 1500 Hemi V8 with a 3.92 rear axel ratioÖI'm pulling a 35 foot Wildwood (7,300 dry) and this was suggested for maximum towing. I've pulled it a couple of times up and down the Texas coast with no problems. Haven't had to go up many hills though...
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Old 05-11-2015, 02:49 PM   #14
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As far as cost, if different axle ratios were stand-alone options, they likely would be identical. They have to put in something, right? The cost comes in when you want to change axle ratios in your existing vehicle, involving parts and labor (or a straight axle swap).

Agree with dustman that it's not straightforward.
I've long noticed that the Ford Expedition can have the axle ratio changed from 3.55 to 3.73, and the max tow rating remain at 6000 lbs. Does not increase to 9000 until you add the HD Towing Package, which does not seem to include the axle ratio change.
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Old 05-11-2015, 05:31 PM   #15
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Thanks Guys... I feel like I gave a better idea of the subject or at least know what to look for with regards to gear ratios.


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Old 05-13-2015, 03:43 PM   #16
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I'm towing 6500# with a Ford Expidition 5.3 L V 8 and 3.31 gears. Works great around Florida and hilly areas. Haven't tackled a mountain with it. That might turn out to be a slow climb. I added an large additional tranny cooler that has a fan. Temps never get above 180 even in Florida heat. It seems to have plenty of power. The 3.73 would have been better but gas mileage would go down I'm sure.
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Old 05-14-2015, 08:27 AM   #17
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Originally Posted by V-Lite Fun View Post
I'm towing 6500# with a Ford Expidition 5.3 L V 8 and 3.31 gears. Works great around Florida and hilly areas. Haven't tackled a mountain with it. That might turn out to be a slow climb. I added an large additional tranny cooler that has a fan. Temps never get above 180 even in Florida heat. It seems to have plenty of power. The 3.73 would have been better but gas mileage would go down I'm sure.
An "Expidition" with a "5.3L"???
Must be one of those cheap Chinese knock-offs!

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Old 05-14-2015, 08:34 AM   #18
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An "Expidition" with a "5.3L"???
Must be one of those cheap Chinese knock-offs!

V-Lite Fun,
Just joking around. We do that.
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Yeah. He's got a 5.4L.
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Old 05-14-2015, 09:57 AM   #19
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Ahh... ok... is there usually a price difference? and... how much difference would it make... say on a regular 1500 / 150 series pickup? A few hundred pounds or very significant... a couple of thousand?


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For Ram, going from the standard 3.21 to 3.92 in the 1500 class is a $50 option. Well worth it if you plan on towing with your truck.
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Old 05-14-2015, 10:04 AM   #20
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For Ram, going from the standard 3.21 to 3.92 in the 1500 class is a $50 option. Well worth it if you plan on towing with your truck.
+1. Naturally aspirated engines need to rev higher to produce power and perform much better with lower gear ratios. That would definitely be $50 well spent.
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