4:56 Gears

4064 Views 25 Replies 10 Participants Last post by Marc T, Aug 9, 2004

Mofo

Discussion Starter · Aug 5, 2004

I have researched the 4:56 gear set up for our trucks. There is a Company in SoCal that is an installer of rear ends (he is direct wiyh Dana). He spoke to Dana about changing from the 4:11 to the 4:56 grears. Dana Corp. says the gears will be released in Aug. to do the job properly. I said some of the guys are already doing it what gives. He stated the only current way of doing it is with a ring gear spacer. He (DANA) also said he would not recommend any one to do this as it is inviting disaster. The gears Dana makes are designed with a special "CROWN" to fit the Dana housings we have in our SRT-10's. His shop is in SoCal (Orange County) and will be able to do installs. I also asked him about guys that cant bring there trucks here,he will ship out the gear sets. As soon as he has a price and inventory, I will post and everyone interested can go direct. He has the first to be shipped comeing to him. Larry

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Titan

· #2 · Aug 5, 2004

Mofo said:
I have researched the 4:56 gear set up for our trucks. There is a Company in SoCal that is an installer of rear ends (he is direct wiyh Dana). He spoke to Dana about changing from the 4:11 to the 4:56 grears. Dana Corp. says the gears will be released in Aug. to do the job properly. I said some of the guys are already doing it what gives. He stated the only current way of doing it is with a ring gear spacer. He (DANA) also said he would not recommend any one to do this as it is inviting disaster. The gears Dana makes are designed with a special "CROWN" to fit the Dana housings we have in our SRT-10's. His shop is in SoCal (Orange County) and will be able to do installs. I also asked him about guys that cant bring there trucks here,he will ship out the gear sets. As soon as he has a price and inventory, I will post and everyone interested can go direct. He has the first to be shipped comeing to him. Larry

I am interested MOFO

begood

· #3 · Aug 5, 2004

sounds great, i contacted my local ring & pinion shop and the said at this time no one makes a set of 4:56's that fit properly with our carrier. so this will really do the trick.

Hamrhead

· #4 · Aug 5, 2004

Thanks Larry! I'm about 100% sure I want them.

kalani

· #5 · Aug 5, 2004

im confused -maybee just not up with it - i thought aac (american axle corp) was now producing all diffs for daimler-chrysler?

Marc T

· #6 · Aug 6, 2004

1200 miles on mine with no problems!!

Except keeping rubber on the tires!!

B.Exxon

· #7 · Aug 7, 2004

will the 4:56 gears be a benefit with a supercharger? if so mofo maybe you could get us deals again seems you know how to always make it happen ..............thanks brian

fstjack

· #8 · Aug 7, 2004

Gimme the gears!!!!!!!!!!!!!!!!!!!

Did some quick calculations and with the 4.56 gears, they should be worth 2-3 10's in 1/4 mile times, this is with no other change. The driveability will be much better also. I will go for the change as soon as soon as the correct Dana made/brand gears are available. MOFO has the inside track on them in the SOCAL area. Stay tuned more to come.
Jack

04 Ram SRT-10 #593, Silver, Under construction..........BE AFRAID, BE VERY AFRAID

My other hot rod is a Chevy
1969 Chevelle B/GS, STREET driven a little***it's got current plates

, BBC, Enderle Bird Injected, 671 Blower-billet rotors and stripped. alum heads, Brooks aluminum rods, Roller everything , 9", Willwood 4 puck on all 4 corners, Tubbed, TH400 w/brake, Chance converter, 33/16/15SS M/T ET DRAG, still on gas, Bad A$$.

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Marc T

· #9 · Aug 7, 2004

Help me out here fellas,

I'm guessing that when my gears, which were stamped Dana gears, where installed they used a spacer of some sort. So the new gears wil be designed so a spacer is not needed?

If so, with the spacer, if it is installed correctly, are they saying it will fail prematurely? I spoke to my shop mechanic at work, who builds muscle cars like I drink beer, he said if the gears are installed and spaced correctly they should be fine. He also stated that in race car applications they space gears all the time to accomadate for different gears for different tracks.

My gears seem to be holding up fine, but I am a little uncomfortable with the things I have been reading.

If the gears were to fail am I looking at blowing out the diff and having to replace it?

I hope not cause I luv this truck twice as much with these gears!!!

BOOMER

· #10 · Aug 7, 2004

Marc T said:
Help me out here fellas,

I'm guessing that when my gears, which were stamped Dana gears, where installed they used a spacer of some sort. So the new gears wil be designed so a spacer is not needed?

If so, with the spacer, if it is installed correctly, are they saying it will fail prematurely? I spoke to my shop mechanic at work, who builds muscle cars like I drink beer, he said if the gears are installed and spaced correctly they should be fine. He also stated that in race car applications they space gears all the time to accomadate for different gears for different tracks.

My gears seem to be holding up fine, but I am a little uncomfortable with the things I have been reading.

If the gears were to fail am I looking at blowing out the diff and having to replace it?

I hope not cause I luv this truck twice as much with these gears!!!

you are fine. the whine shouldnt be their though. strange engineering is a Dana distributor & they have the gear sets to go in. spacing them is ok, it is the same but different.

Hamrhead

· #11 · Aug 7, 2004

Hey Marc,

I've known quite a few friends who have used shims over the years and never had problems because of them. If you've gone 1,200+ miles already with no problems, I would think you're ok.

Marc T

· #12 · Aug 7, 2004

Boomer, Hammerhead,

Thanks for the replys. I feel a little better now. I think I may take it to a rear end specialist and have them check it out just for sure. Can.t hurt to openm it up and take a look!!

Titan

· #13 · Aug 8, 2004

Marc T said:
Boomer, Hammerhead,

Thanks for the replys. I feel a little better now. I think I may take it to a rear end specialist and have them check it out just for sure. Can.t hurt to openm it up and take a look!!

Yeah I would do that too. If not for only piece of mind..

So tell me more how the gears made a worth while difference over stock..
I am seriously considering this, I believe it's the wat to go..

Marc T

· #14 · Aug 8, 2004

Titan said:
Yeah I would do that too. If not for only piece of mind..

So tell me more how the gears made a worth while difference over stock..
I am seriously considering this, I believe it's the wat to go..

Definitely feels much more torquey. I can get rubber in third which I couldn,t do before.

You have to realise though, I did this gear change along with a clutch upgrade & lightweight flywheel so I am sure a little of the punch is comming from there.

Titan

· #15 · Aug 8, 2004

Marc T said:
Definitely feels much more torquey. I can get rubber in third which I couldn,t do before.

You have to realise though, I did this gear change along with a clutch upgrade & lightweight flywheel so I am sure a little of the punch is comming from there.

Kewl, did the new clutch and lighten flywheel make a big differance on shifting ?
Smooth up that 3rd gear ?

Vegas-viper-ram

· #16 · Aug 8, 2004

where did you order it from?

Marc T

· #17 · Aug 8, 2004

Titan said:
Kewl, did the new clutch and lighten flywheel make a big differance on shifting ?
Smooth up that 3rd gear ?

Sean,

The clutch up grade was the best thing Ive done. Shifting is crisp and easy. Third gear is no problem anymore. Before I use to miss third all the time.

Vegas-Viper Ram

I purchased the clutch from Centerforce Part# DF985985 and the Flywheel from Roe Racing.

Titan

· #18 · Aug 8, 2004

Marc T said:
Sean,

The clutch up grade was the best thing Ive done. Shifting is crisp and easy. Third gear is no problem anymore. Before I use to miss third all the time.

Vegas-Viper Ram

I purchased the clutch from Centerforce Part# DF985985 and the Flywheel from Roe Racing.

Good info, Thanks

Hamrhead

· #19 · Aug 8, 2004

Marc T said:
I purchased the clutch from Centerforce Part# DF985985 and the Flywheel from Roe Racing.

Would ya happen to have some rough prices on these parts?

AND, is the light flywheel necessary for the Centerforce Clutch upgrade, or did you just choose to do that? If you chose to upgrade it, why?

TIA

Marc T

· #20 · Aug 8, 2004

Hamrhead said:
Would ya happen to have some rough prices on these parts?

AND, is the light flywheel necessary for the Centerforce Clutch upgrade, or did you just choose to do that? If you chose to upgrade it, why?

TIA

The light wieght flywheel is not necessary when installing a new clutch and pressure plate. The clutch upgrade will not offer any any extra HP however the light flywheel will give you some added horsepower!!

The stock flywheel is one heavy SOB! What the gains will be I'm not sure. I guess about a 30% gain in power.

1 - 20 of 26 Posts

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