3.73 vs. 4.10
Posting Guru
Joined: Oct 2005
Posts: 1,305
Likes: 0
From: Wisconsin
i would stick with what you have.
410GR is good for towing, its easy on your transmition and axles and such. and i would think a 3 73 GR would only be good for highway milage.
just my 2 cents
Mitch
410GR is good for towing, its easy on your transmition and axles and such. and i would think a 3 73 GR would only be good for highway milage.
just my 2 cents
Mitch
Postmaster
Joined: Jun 2007
Posts: 2,795
Likes: 1
From: Rogue River, OR
I have 3.55 on '97 2X4 auto on the hwy, empty I can get 19-20 MPG
In town I get 16-18 MPG My right foot really controls the MPG
Towing my 5th wheel, which it does without effort and depending on the terrain, 10-14 MPG. If I get a long stretch of down hill, MPG pick up.
I realize that this was not the gear ratio that you were inquiring about but it may help in your decision.
You may also consider amortizing the cost of the gear change against the increase of milage. Your age and life expectancy could come into play as well.
Rog
In town I get 16-18 MPG My right foot really controls the MPG
Towing my 5th wheel, which it does without effort and depending on the terrain, 10-14 MPG. If I get a long stretch of down hill, MPG pick up.
I realize that this was not the gear ratio that you were inquiring about but it may help in your decision.
You may also consider amortizing the cost of the gear change against the increase of milage. Your age and life expectancy could come into play as well.
Rog
Logistics Pro
Joined: Mar 2007
Posts: 4,580
Likes: 839
From: knoxville, tn
the change in gears really isn't worth the effort from a 4.10 to a 3.73. and you can tune your truck to get better mpgs for less than a gear change
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Posting Guru
Joined: Apr 2005
Posts: 1,190
Likes: 0
From: minneapolis, ks
I've got 3.55's in one truck, 3.73's in another and 4.10's in the last psd.
4.10s are definatly towing gears, i hate crusing down the hwy in that truck empty. The rpms are too high imo.
3.73's are good for towing and have noticeably lower rpms than 410's
3.55's are AWESOME for hwy cruising and work ok for towing on the hwy but not so hot in the city.
IIRC there is roughly a 400rpm drop at a given speed when dropping from 410s to 3.55s
4.10s are definatly towing gears, i hate crusing down the hwy in that truck empty. The rpms are too high imo.
3.73's are good for towing and have noticeably lower rpms than 410's
3.55's are AWESOME for hwy cruising and work ok for towing on the hwy but not so hot in the city.
IIRC there is roughly a 400rpm drop at a given speed when dropping from 410s to 3.55s
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Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
I am not sure anybody makes 3.73 gears for the 10.25 sterling. If you do swap you would be best off finding somebody who has them and want to swap to 4.10's and just swap the whole axles. it will be much cheaper! Even just for parts it will take lots of miles to make any gains. A OD/UD unit are over $2k.
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
10.25 ring and pinion- http://store.summitracing.com/partde...5&autoview=sku
dana 50 3.73's- http://completeoffroad.com/i-123816-...ng-pinion.html
air locker now available for dana 50 as well- http://www.completeoffroad.com/wsm/i...r_dana_50.html
and the lock-rite locker now available as well for dana 50- http://completeoffroad.com/i-123824-...powertrax.html
dana 50 3.73's- http://completeoffroad.com/i-123816-...ng-pinion.html
air locker now available for dana 50 as well- http://www.completeoffroad.com/wsm/i...r_dana_50.html
and the lock-rite locker now available as well for dana 50- http://completeoffroad.com/i-123824-...powertrax.html
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
[QUOTE=c00nhunterjoe]10.25 ring and pinion- http://store.summitracing.com/partdetail.asp?autofilter=1&part=MGR%2DF10%2D25%2D 373L&N=700+4294925134+4294918962+4294901286+115&au toview=sku
dana 50 3.73's- http://completeoffroad.com/i-123816-3-73-gears-dana-50-ring-pinion.html
air locker now available for dana 50 as well- http://www.completeoffroad.com/wsm/i-1171_arb_air_locker_dana_50.html
and the lock-rite locker now available as well for dana 50- http://completeoffroad.com/i-123824-lockright-locker-dana-50-powertrax.html[/QUOTE]
Good find Joe. I do know that a 10.5 gear set won't fit a 10.25 or the other way around. The pinion is different length
dana 50 3.73's- http://completeoffroad.com/i-123816-3-73-gears-dana-50-ring-pinion.html
air locker now available for dana 50 as well- http://www.completeoffroad.com/wsm/i-1171_arb_air_locker_dana_50.html
and the lock-rite locker now available as well for dana 50- http://completeoffroad.com/i-123824-lockright-locker-dana-50-powertrax.html[/QUOTE]
Good find Joe. I do know that a 10.5 gear set won't fit a 10.25 or the other way around. The pinion is different length
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
i knew ther ewould be a difference, i just never looked into it, i would imagine the ring gears are the same though since you can swap carriers. i really like the ability to put a locker in the dana 50 now, another addition to my ever expanding list
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