I have the 8.25 inch Chrysler 3.55 rear diff. if i want to get the rear regeared to say 4.10 gears, i would have to regear the front as well yes? is the front 3.55 aswell?

 

the 3.55 gearing is in both axles, if you regear you MUST regear both front and rear, uhh any other questions?

 

Not sure on the carrier breaks on the Chrysler 8.25" but it looks like the only break point is Carrier Breaks: 2.45 / 2.56 & Up http://www.ringpinion.com/DiffDetail...2%26DiffID%3d7

Here is some sets:

http://www.ringpinion.com/PartsList....fID=7&CatID=10

 

thanks for the info! what is the "carrier break" in a diff? i think i might go with the 4.56 they are the same price as the 4.10 hehe would 4.56 fit in the 8.25? how to tell?

 

im not a expert in gearing but i would really imagine that your going have basically no top end and horrible mpg with 4.56's. Plus you want to get gearing best suited for your rpm range that is the most effective for your use. Im looking into changing the gears sometime but i honestly have no idea what i would want.

 

~k~

There are different circumferences for gear sets. This circumference on one gear set might not fit and the same carrier. The Carrier is the main body that rotates inside of the differential. This is what the axle shafts insert into. Here is an empty Carrier:



This could be a Limited Slip, Open Gearing, Or Posi carrier. The Ring and Pinion is the main gears that rotate the carrier. The Pinion is the gear shaft that comes into the the differential from the Driveline. It also has the Yoke on it. The Ring gear is the main large gear that is bolted to the carrier.

Here is a Ring gear installed on a carrier. It has yellow marking compound on it:




Now depending on the Ring gear you have (yours being the 3.55's) they are a certin height and overall dimension to include all the teeth and so forth. When you change to larger gearing (meaning a shorter gearing like 4.10's) the ring gear overall changes in overall dimension so that they are smaller or larger than the carrier. The carrier then must be changed to accommodate the new ring gear.

In a DANA 70 rear differential for instance, they go from 3.55's to 3.78's to 410's then there is a carrier break (The carrier is a different overall size to accommodate the shorter gear). The different carrier holds the gearing from 4.56's to 4.88's to 5.13 and whatever else.


Here is a Ring Gear (large) and Pinion Gear (small). Ring gear again turns the carrier, the Pinion turns the Ring gear from the Driveline.

 

wow good post hydra

 

You're right. You're not an expert. lol

I switched to 4.56:1 gears and lost no mpg in town and only 1 mpg on the hwy and that's with the 360 that doesn't like to rev.

Top end? How much top end do you need? I can easily get over 90 mph which is more than I ever need to go.

The difference in power is night and day. It leaps off the line now. When you go to pass someone, you don't even have to downshift but if you do press it down that hard, you get around that person VERY fast.

Here's a video:

http://www.youtube.com/watch?v=mPt7PQU_XwQ

 

Jesus im just saying from what iv heard, but maybe you didnt lose any mpg because 4.56 was better gearing that whas more efficent then what was in before.

 

yea i was thinking about that. i never go past 90 really. its not a sports car. im slowly building it up so i can hit some trails. but it will have mostly street miles.