Speed for 4x4High
Grand Champion
Joined: May 2019
Posts: 5,156
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From: S.W. Indiana
The difference between 3.54 and 3.55 is so miniscule as to not matter at all and would easily be rendered mathematically useless by very slight differences in tire wear or air pressure.
This whole thing is urban legend, too. Any differences came from different manufacturers, ie Dana Spicer vs corporate (be it a Chrysler 9.25 or Ford 8.8 or whatever). Some manufacturers say tomato, some say tomahto, but whether you say your household outlets are 110V, 115V, or 120V it all refers to same industry standard.
This whole thing is urban legend, too. Any differences came from different manufacturers, ie Dana Spicer vs corporate (be it a Chrysler 9.25 or Ford 8.8 or whatever). Some manufacturers say tomato, some say tomahto, but whether you say your household outlets are 110V, 115V, or 120V it all refers to same industry standard.
If you have a chain driven transfer case, you want lower in the front. That's not a myth. I've been in a truck where the chain bunched then grenaded the transfer case. It's possible it had broken.Training by engineers and 50+ years experience tell me to use a lower ratio in front.
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Veteran
Joined: Apr 2019
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Is that right. Something with the whole mechanical mechanism feels like you shouldn't haha. These new trucks with there electrical dials is a different story. But good to know
Administrator
Joined: Apr 2010
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From: Clayton MI
4 High is actually synchronized, just like a manual trans. So, it doesn't make truly rude and nasty noise when you shift into 4 high when moving. 4 Lo, on the other hand, is NOT synchronized, and you can't be moving any faster than like 3 or 4 miles per hour to shift into 4 Lo. 
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Veteran
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4 High is actually synchronized, just like a manual trans. So, it doesn't make truly rude and nasty noise when you shift into 4 high when moving. 4 Lo, on the other hand, is NOT synchronized, and you can't be moving any faster than like 3 or 4 miles per hour to shift into 4 Lo.
I was gonna say I'm sure there would be some grinding sounds coming from the transfer case while moving . But I'm not a professional just a guy trying to learn
Veteran
Joined: Mar 2013
Posts: 277
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From: Sunny ****ing Nevada, Rockies to B.C.
Some of us have to get out to throw the hubs in.
Have an EMS Off Road conversion to part time/CAD delete with a free friendly upgrade to the Yukon Kit they make for ....Yukon. Love it.
Been driving Rocky winters since 1982. Will do 60+ with full confidence in 4x4 and high quality tires on s*** roads. Reduce for serious ice. 4x4 will give you the ability to power/drive out of situations that 2x4 would just allow the tail to come around.
Having said that, took my '95 2500 about 60mi on damp/dry pavement in 4hi speeds up to about 65. Dumbest thing I've done lately, all because I live about 30 mi off the end of the pavement, forgot to turn my hubs out. No problems. Astonishing. Dodge build trucks apparently.
Have an EMS Off Road conversion to part time/CAD delete with a free friendly upgrade to the Yukon Kit they make for ....Yukon. Love it.
Been driving Rocky winters since 1982. Will do 60+ with full confidence in 4x4 and high quality tires on s*** roads. Reduce for serious ice. 4x4 will give you the ability to power/drive out of situations that 2x4 would just allow the tail to come around.
Having said that, took my '95 2500 about 60mi on damp/dry pavement in 4hi speeds up to about 65. Dumbest thing I've done lately, all because I live about 30 mi off the end of the pavement, forgot to turn my hubs out. No problems. Astonishing. Dodge build trucks apparently.
Grand Champion
Joined: May 2019
Posts: 5,156
Likes: 723
From: S.W. Indiana
Some of us have to get out to throw the hubs in.
Have an EMS Off Road conversion to part time/CAD delete with a free friendly upgrade to the Yukon Kit they make for ....Yukon. Love it.
Been driving Rocky winters since 1982. Will do 60+ with full confidence in 4x4 and high quality tires on s*** roads. Reduce for serious ice. 4x4 will give you the ability to power/drive out of situations that 2x4 would just allow the tail to come around.
Having said that, took my '95 2500 about 60mi on damp/dry pavement in 4hi speeds up to about 65. Dumbest thing I've done lately, all because I live about 30 mi off the end of the pavement, forgot to turn my hubs out. No problems. Astonishing. Dodge build trucks apparently.
Have an EMS Off Road conversion to part time/CAD delete with a free friendly upgrade to the Yukon Kit they make for ....Yukon. Love it.
Been driving Rocky winters since 1982. Will do 60+ with full confidence in 4x4 and high quality tires on s*** roads. Reduce for serious ice. 4x4 will give you the ability to power/drive out of situations that 2x4 would just allow the tail to come around.
Having said that, took my '95 2500 about 60mi on damp/dry pavement in 4hi speeds up to about 65. Dumbest thing I've done lately, all because I live about 30 mi off the end of the pavement, forgot to turn my hubs out. No problems. Astonishing. Dodge build trucks apparently.
My old '84 had Warn lockouts on the front hubs. In nasty weather I'd lock them in and just lose about 1/2 mile per gallon. Then pull it in and out of 4high as needed. The front axles just free wheel without the hubs.
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Veteran
Joined: Apr 2019
Posts: 497
Likes: 4
Some of us have to get out to throw the hubs in.
Have an EMS Off Road conversion to part time/CAD delete with a free friendly upgrade to the Yukon Kit they make for ....Yukon. Love it.
Been driving Rocky winters since 1982. Will do 60+ with full confidence in 4x4 and high quality tires on s*** roads. Reduce for serious ice. 4x4 will give you the ability to power/drive out of situations that 2x4 would just allow the tail to come around.
Having said that, took my '95 2500 about 60mi on damp/dry pavement in 4hi speeds up to about 65. Dumbest thing I've done lately, all because I live about 30 mi off the end of the pavement, forgot to turn my hubs out. No problems. Astonishing. Dodge build trucks apparently.
Have an EMS Off Road conversion to part time/CAD delete with a free friendly upgrade to the Yukon Kit they make for ....Yukon. Love it.
Been driving Rocky winters since 1982. Will do 60+ with full confidence in 4x4 and high quality tires on s*** roads. Reduce for serious ice. 4x4 will give you the ability to power/drive out of situations that 2x4 would just allow the tail to come around.
Having said that, took my '95 2500 about 60mi on damp/dry pavement in 4hi speeds up to about 65. Dumbest thing I've done lately, all because I live about 30 mi off the end of the pavement, forgot to turn my hubs out. No problems. Astonishing. Dodge build trucks apparently.
Thats sweet. I got yukon 4.10 gears in my setup the rest is stock
Veteran
Joined: Mar 2013
Posts: 277
Likes: 37
From: Sunny ****ing Nevada, Rockies to B.C.
I drive B.C. to NV and out to TX/NM in a big triangle mostly, 30-40k mi/yr., minimal choice on road conditions or timing. One truck or the other. 2500 runs 285/75-18 Duratracs, '03 runs 275/70s, absolutely love them as well. 1750 V-10 RPM at 70 mph is nice, but the power is not where I think it should be. Have some US Gear 3.73, DANA 70/60, but not ready to give up my 3.54s. Have a reground cam and some valvetrain to sort out, then we'll rebuild/regear the differentials.