gears
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Elder User
Joined: Oct 2008
Posts: 669
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From: Jacksonville, NC
gears
I was looking into getting 4.30 gears for my v10 X. What kind of job is that? Are any special tools needed? What kind of acceleration differences should i expect?
Thanks
Thanks
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
This is one of those jobs where if you have to ask, you need professional help. Either find a friend that's done this before or let a shop do it. Gear set up is critical, you need them to mesh correctly to prevent noise and premature failure. At a minimum you will need basic hand tools, feeler gauges and a dial indicator with stands.
Acceleration differences would depend on your current gear. If you have 3.73s it should feel at least 1000lbs lighter.
Acceleration differences would depend on your current gear. If you have 3.73s it should feel at least 1000lbs lighter.
Cargo Master
Joined: Nov 2008
Posts: 2,332
Likes: 2
From: Summit, MS
This is one of those jobs where if you have to ask, you need professional help. Either find a friend that's done this before or let a shop do it. Gear set up is critical, you need them to mesh correctly to prevent noise and premature failure. At a minimum you will need basic hand tools, feeler gauges and a dial indicator with stands.
Acceleration differences would depend on your current gear. If you have 3.73s it should feel at least 1000lbs lighter.
Acceleration differences would depend on your current gear. If you have 3.73s it should feel at least 1000lbs lighter.
You can look to pay around $750 per axle (2 if you're 4x4) for parts and labor to have a shop do it.
I changed the gears in my 2000 Durango from the factory 3.55:1 to 4.56:1 and my 0-60 time dropped by a full 2 seconds. HUGE difference!!
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
I think without going to 35" tires, 4.56 will be too steep. I love my 4.56s with 35" mud tires, but I think it would be too much for stock tires. The 4.30s is a powerful choice for stockish tires.
The front axle seems like the more expensive side, I brought my guy the gears and fluid. He installed and rebuilt the stock LS for just over $900. Front and rear 4.56, royal purple (break in and refill),motive gears, diff rebuild kit and Mag hytech for the rear, I figure I spent around $2000 installed.
The front axle seems like the more expensive side, I brought my guy the gears and fluid. He installed and rebuilt the stock LS for just over $900. Front and rear 4.56, royal purple (break in and refill),motive gears, diff rebuild kit and Mag hytech for the rear, I figure I spent around $2000 installed.
Cargo Master
Joined: Nov 2008
Posts: 2,332
Likes: 2
From: Summit, MS
I think without going to 35" tires, 4.56 will be too steep. I love my 4.56s with 35" mud tires, but I think it would be too much for stock tires. The 4.30s is a powerful choice for stockish tires.
The front axle seems like the more expensive side, I brought my guy the gears and fluid. He installed and rebuilt the stock LS for just over $900. Front and rear 4.56, royal purple (break in and refill),motive gears, diff rebuild kit and Mag hytech for the rear, I figure I spent around $2000 installed.
The front axle seems like the more expensive side, I brought my guy the gears and fluid. He installed and rebuilt the stock LS for just over $900. Front and rear 4.56, royal purple (break in and refill),motive gears, diff rebuild kit and Mag hytech for the rear, I figure I spent around $2000 installed.
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
It depends on the the transmission. His is either 0.74:1 (4r100) or 0.70:1ish (5r110), with 35" tires 60mph is right at engine 2000rpms. With stockers the engine rpms go up only a little for 33s and a bit more for 31s. Your looking at 2700rpms for 70mph, and that's tighter than I want to keep an engine at for long lengths of time.
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
FWIW, the 4R100 & the 5R110 have the same OD ratio of .71. 
Having just regeared to 4.30's when I put on my 20's I can say, equivocally, that they are a perfect ratio. My tires are slightly taller than stockers and I still sometimes feel that it could use a lower OD. I know I'd be really frustated if I had 4.56's given the amount of torque the V10 makes (especially compared to the Hemi Durango)
Acceleration is much improved! Although I have no empirical data to back that up.
Having just regeared to 4.30's when I put on my 20's I can say, equivocally, that they are a perfect ratio. My tires are slightly taller than stockers and I still sometimes feel that it could use a lower OD. I know I'd be really frustated if I had 4.56's given the amount of torque the V10 makes (especially compared to the Hemi Durango)
Acceleration is much improved! Although I have no empirical data to back that up.
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Brett Foote
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From: Sterling, Colorado
She's gone on to another happy home, but I had an '05 V-10 Excursion that I used to tow a 30' travel trailer quite regularly in the Colorado mountains. I was looking for more power and had tried several options, including a couple different programmers and ultimately a full Banks Powerpack (headers and all). None of it really made much of a difference -- and certainly not a difference that was worth the expense.
As a last ditch to gain the power I wanted, I swapped my 3.73's for a set of 4.56's and it was, without question, THE BEST decision I made with regard to increasing performance. I was running 33's, and the combination made for one hell of a towing rig.
Unloaded, on the open highway, the 4.56's obviously caused higher RPM's, but I only dropped about .5 mpg on average. While towing though, I actually increased 1-2mpg.
If I had it to do all over again I would have skipped the programmers and the Banks stuff and just went with the gear swap -- and I'd be $$$$ ahead!
As a last ditch to gain the power I wanted, I swapped my 3.73's for a set of 4.56's and it was, without question, THE BEST decision I made with regard to increasing performance. I was running 33's, and the combination made for one hell of a towing rig.
Unloaded, on the open highway, the 4.56's obviously caused higher RPM's, but I only dropped about .5 mpg on average. While towing though, I actually increased 1-2mpg.
If I had it to do all over again I would have skipped the programmers and the Banks stuff and just went with the gear swap -- and I'd be $$$$ ahead!
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