4.56 gears price. I got a quote. have a few question.
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Professional
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Make sure you check back Al! I wanna hear what its like to have 4.56 in our trucks!!!!
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From: South Georgia/East Florida
Been running 4.56s since spring of '05 and have never heard a hint of a whine. Although some report a slight whine with certain brands of after-market gears that have not effected performance.
Speedo reads off the ring, so gearing does not effect reading. Only tire diameter directly effects the speedo.
Drastic gear change (as well as just a drastic tire size change) will effect transmission shift points to a small degree. I have my shift points (and speedo) changed with my tuner - with the aggressiveness of the shifts being in direct proportion to how hard I'm on the throttle.
ALL ring & pinion sets ship with a protective phosphorous coating which wears off the surface during break-in. Heat causes a chemical reaction with this material which acts to reduce the effectiveness (lubrication properties) of the gear lube. Hence, YOU NEED TO CHANGE THE FLUID AFTER BREAK-IN. Plus, you really need to inspect the gears for proper wear pattern after break-in. So what better time to do both than when changing the fluid at or around 500 miles???
Personally, I'd hesitate to use a shop who does NOT recommend a post break-in fluid change AND a visual inspection of their work...
Speedo reads off the ring, so gearing does not effect reading. Only tire diameter directly effects the speedo.
Drastic gear change (as well as just a drastic tire size change) will effect transmission shift points to a small degree. I have my shift points (and speedo) changed with my tuner - with the aggressiveness of the shifts being in direct proportion to how hard I'm on the throttle.
ALL ring & pinion sets ship with a protective phosphorous coating which wears off the surface during break-in. Heat causes a chemical reaction with this material which acts to reduce the effectiveness (lubrication properties) of the gear lube. Hence, YOU NEED TO CHANGE THE FLUID AFTER BREAK-IN. Plus, you really need to inspect the gears for proper wear pattern after break-in. So what better time to do both than when changing the fluid at or around 500 miles???
Personally, I'd hesitate to use a shop who does NOT recommend a post break-in fluid change AND a visual inspection of their work...
Last edited by HammerZ71; Dec 8, 2012 at 03:25 PM.
Champion
Joined: Aug 2006
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From: New Jersey
Been running 4.56s since spring of '05 and have never heard a hint of a whine. Although some report a slight whine with certain brands of after-market gears that have not effected performance.
Speedo reads off the ring, so gearing does not effect reading. Only tire diameter directly effects the speedo.
Drastic gear change (as well as just a drastic tire size change) will effect transmission shift points to a small degree. I have my shift points (and speedo) changed with my tuner - with the aggressiveness of the shifts being in direct proportion to how hard I'm on the throttle.
ALL ring & pinion sets ship with a protective phosphorous coating which wears off the surface during break-in. Heat causes a chemical reaction with this material which acts to reduce the effectiveness (lubrication properties) of the gear lube. Hence, YOU NEED TO CHANGE THE FLUID AFTER BREAK-IN. Plus, you really need to inspect the gears for proper wear pattern after break-in. So what better time to do both than when changing the fluid at or around 500 miles???
Personally, I'd hesitate to use a shop who does NOT recommend a post break-in fluid change AND a visual inspection of their work...
Speedo reads off the ring, so gearing does not effect reading. Only tire diameter directly effects the speedo.
Drastic gear change (as well as just a drastic tire size change) will effect transmission shift points to a small degree. I have my shift points (and speedo) changed with my tuner - with the aggressiveness of the shifts being in direct proportion to how hard I'm on the throttle.
ALL ring & pinion sets ship with a protective phosphorous coating which wears off the surface during break-in. Heat causes a chemical reaction with this material which acts to reduce the effectiveness (lubrication properties) of the gear lube. Hence, YOU NEED TO CHANGE THE FLUID AFTER BREAK-IN. Plus, you really need to inspect the gears for proper wear pattern after break-in. So what better time to do both than when changing the fluid at or around 500 miles???
Personally, I'd hesitate to use a shop who does NOT recommend a post break-in fluid change AND a visual inspection of their work...
+1 on the bold & underlined above...
Welcome back Hammer!
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Joined: Nov 2012
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The break in gear oil debate rages on. It's on Pirate too. from the factory they don't change the gear oil, but supposedly they lap the gears on a bench at the factory :shrug:
Question for those with 4.56's. are any of you running factory wheels/tires. I have the factory 20's (so about a 33" tall tire) and am thinking 4.56's.
What RPM do you guys run at 70? i'd like to be 2500-2700ish for towing.
Thanks!
Question for those with 4.56's. are any of you running factory wheels/tires. I have the factory 20's (so about a 33" tall tire) and am thinking 4.56's.
What RPM do you guys run at 70? i'd like to be 2500-2700ish for towing.
Thanks!
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Joined: Nov 2012
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i did. but most of them just give you 1:1 ratio. I'm getting 3200 rpm at 70... but then i should multiply that my .67 right? which gives me 2144... which seems way too low...
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Joined: Nov 2012
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ok, i found one that lets me enter final drive... i thought the 03 had a .67 OD but i'm finding .75 online...
anyone know
with a .75 i'd be in the neighborhood of 2250 with 32.5" tall tires and 4.56's.... does that sound right?
anyone know
with a .75 i'd be in the neighborhood of 2250 with 32.5" tall tires and 4.56's.... does that sound right?