Re-Gearing Question

[olyelr]

Post # 15 ...

I think that your statement can not be correct ??

Say for instance , 3 trucks with 20" tires, all tires are 33.5" tall.
Each Rams transmission is identical

Truck #1 has the 3:21 Ratio Ring & Pinion
Truck #2 has the 3:55 Ratio Ring & Pinion
Truck #3 has the 3:92 Ratio Ring & Pinion

All 3 of those Ratios have been available in every 1500 Model Ram for several years now.

Almost every 1500 model Ram can be ordered with
20" wheels

The reason that they 3 axle ratios, like Towing/Power/ & even Speed advantages

Huh?

He said he had 20” wheels.

You said going to 18’s would make a difference.

But it wont, unless you change the tire size.

And, the OP has a 2500 (not that it makes a difference in tire size-to-gear ratio).

 

[Dusty]

Huh?

He said he had 20” wheels.

You said going to 18’s would make a difference.

But it wont, unless you change the tire size.

And, the OP has a 2500 (not that it makes a difference in tire size-to-gear ratio).

That might of been what GTYankee meant, at least that's how I interpreted his comment.

I think changing tire/wheel size would be an avenue i would explore since re-gearing two diffs is going to be very expensive.

Regards,
Dusty
2019 Ram 1500 Billet Silver Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33-gallon fuel tank, 18” wheels. Build Date: 3 June 2018. Now at 132150 miles.

 

[Sherman Bird]

Your truck does Not have a tru-lok, it may or may not have a limited slip rear though.

I highly reccomend talking to a shop that has experience doing Ram HD trucks, From what I've seen it's not an easy swap and can be quite expensive on these trucks. Not as straight forward as some other brands (from what I have seen and read anyway)

If the diffs are still Dana, they are some work, but not too bad.

 

[Dean2]

If the diffs are still Dana, they are some work, but not too bad.

If you can do it yyourself, parts cost isn't bad, about 1600 dollars. If you want a shop to do it these days you are looking at anywhere from 4 to 6 grand, depending on local labour rates. I had a buddy who just got quotes from 4 shops, that was the quote range.

Going from 275 70 18 tire to a 275 60 18 with 3.73 gears gives you the equivalent of going to a 4.0 gear set. That is just how little of a change in tire diameter is needed to affect the overall gear.

 

[olyelr]

That might of been what GTYankee meant, at least that's how I interpreted his comment.

I think changing tire/wheel size would be an avenue i would explore since re-gearing two diffs is going to be very expensive.

Regards,
Dusty
2019 Ram 1500 Billet Silver Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33-gallon fuel tank, 18” wheels. Build Date: 3 June 2018. Now at 132150 miles.

I get that. But he was just saying going to an 18” wheel would help. It wont do anything if the overall tire size is the same.

 

[crazy jerry]

If the diffs are still Dana, they are some work, but not too bad.

theyve not been dana for over 2 decades. im suprised your not aware of that

 

[Sherman Bird]

theyve not been dana for over 2 decades. im suprised your not aware of that

 

[68PowerWagon]

Why do you want the 4.10s? It's going to be a lot of money for not very much change in driving since you have the 8 speed. Even if you had the 66rfe the cost to go from 3.73s to 4.10s wouldn't be worth it in my opinion. 4.56s or a bigger jump in gears would make for a lot better driving experience depending on how your truck is used and what tires you have.

I did a gear swap on my 2016 & it made a big difference but that was with the old 6 speed tranny & I went to 4.56. Like whats been said that is a lot of money for not much difference if you go with 4.10's.

 

[dieselscout80]

If you can do it yyourself, parts cost isn't bad, about 1600 dollars. If you want a shop to do it these days you are looking at anywhere from 4 to 6 grand, depending on local labour rates. I had a buddy who just got quotes from 4 shops, that was the quote range.

Going from 275 70 18 tire to a 275 60 18 with 3.73 gears gives you the equivalent of going to a 4.0 gear set. That is just how little of View attachment 567596 a change in tire diameter is needed to affect the overall gear.

Seems like a good calculator.

What the link to that calculator?

 

[mtnrider]

Seems like a good calculator.

What the link to that calculator?

Gear Ratio Calculator

Easy to use gear ratio calculator. Use our gear ratio calculator to find the correct gear ratio to run when changing tire sizes to keep your stock gearing.

tiresize.com

 

[Dean2]

Seems like a good calculator.

What the link to that calculator?

Gear Ratio Calculator

Easy to use gear ratio calculator. Use our gear ratio calculator to find the correct gear ratio to run when changing tire sizes to keep your stock gearing.

tiresize.com

 

[Dean2]

Gear Ratio Calculator

Easy to use gear ratio calculator. Use our gear ratio calculator to find the correct gear ratio to run when changing tire sizes to keep your stock gearing.

tiresize.com

That is funny. Were were posting at the same time.