2012 2wd 4.56 gear swap

[TXCMark]

finally found a carrier to have machined, so i can do the gear swap. Its off to Fasthemi for machining tomorrow. cant wait to get rid of the 355s!

 

[Hemi450hp]

Congrats. Josh will take care of you, and those 4.56's are going to put a smile on your face.

 

[TylerB]

Sweet x2 on Josh taking care of you.

 

[09SMOKINHEMI]

Wow 4.56's..... that is going to be a huge difference

sent from my Samsung Galaxy S3

 

[fastNugly]

I'm lifted and noticed a HUGE difference going from 3.55 to 4.56.
I'm sure you will notice it and more.

Congrats

 

[URdone21]

What does going from 3.55 to other gears cost? Benefits? Negatives?

 

[BlkRamRt]

3.55 to 4.56 would feel better than a TQ?

 

[URdone21]

I'm lifted and noticed a HUGE difference going from 3.55 to 4.56.

Can you be more specific? I'm not knowledgable on gears.

 

[fastNugly]

What does going from 3.55 to other gears cost? Benefits? Negatives?

Depends on if you're 2wd or 4wd.
Of course 4wd will cost more. Usually double. BUT for 4wd 2012, a new front diff assembly is required as the stock gears are welded.
I have pics of the nasty stock carrier when my shop had it open. Pretty sad
But since the rear carrier needs to be machined too. It's close to an even split.

I'd say for a 2wd, run you $1000-$1200
4wd will run you $2200-$2400
These are avg prices. Some may charge $50-$200 less and some shops will charge $50-$200 more.
It's all in their experience and comfort level in doing it. And whether they can machine in house or not.

Can you be more specific? I'm not knowledgable on gears.

The more leverage the engine has the better the performance. With a lifted truck, add of course tire diameter, the wind resistance from the added height and then the huge weight of heavy rims and tires up. It's a big difference over the truck sitting stock. You want that transmission to not get hot just moving the truck...... you want better than snail acceleration.... you gear it.
Basically re gearing gets your truck back to stock ratio or better than stock ratio.

Hope this makes sense.

 

[URdone21]

Depends on if you're 2wd or 4wd.
Of course 4wd will cost more. Usually double. BUT for 4wd 2012, a new front diff assembly is required as the stock gears are welded.
I have pics of the nasty stock carrier when my shop had it open. Pretty sad
But since the rear carrier needs to be machined too. It's close to an even split.

I'd say for a 2wd, run you $1000-$1200
4wd will run you $2200-$2400
These are avg prices. Some may charge $50-$200 less and some shops will charge $50-$200 more.
It's all in their experience and comfort level in doing it. And whether they can machine in house or not.



The more leverage the engine has the better the performance. With a lifted truck, add of course tire diameter, the wind resistance from the added height and then the huge weight of heavy rims and tires up. It's a big difference over the truck sitting stock. You want that transmission to not get hot just moving the truck...... you want better than snail acceleration.... you gear it.
Basically re gearing gets your truck back to stock ratio or better than stock ratio.

Hope this makes sense.

My truck is 2WD and I'll never lift it.

 

[fastNugly]

My truck is 2WD and I'll never lift it.

If you're running stock tires or slightly larger than stock and won't ever race, then you're fine.
Gears also help those looking for more 'get up' even if they are not lifted. Like the OP

 

[URdone21]

If you're running stock tires or slightly larger than stock and won't ever race, then you're fine.
Gears also help those looking for more 'get up' even if they are not lifted. Like the OP

Thanks for the info

 

[fastNugly]

Thanks for the info

No problem at all

 

[Hornet]

Anybody try a Gear Vendors Underdrive.
Gives roughly the same final drive ratio,and still lets you run down the road at a decent RPM
Been kicking one of them around,so curious to know if anybody is running one.

 

[fasthemiram12]

Those are for the 727/518 transmissions.
We have 545/645RFE's

 

[TXCMark]

Got the machined diff carrier ready for the 4.56 ring! and ensured I got an LSD carrier (OEM) machined to convert my non-lsd during the gear swap.

I also picked up a PML diff cover along the way. Can't wait to get these installed!

 

[fasthemiram12]

Get it in there already!

 

[TRXHemi]

Wow! Nice man!

 

[popcenator]

Oh, if only I had the money. I'm excited for you!

Sent from my Galaxy Nexus using Tapatalk 4

 

[09SMOKINHEMI]

Awesome!! I am jealous... looking forward to hearing your reviews

sent from my Samsung Galaxy S3