4.10 guys....check something for me.

[Vortech347]

I really want to know what the tach is at...

@ 75mph?

@ 90mph?

What mph does 3rd go to?

I really liked the 3.73's because they did help down low a bit and didn't tach it up much on the top end.

[Stranger in the Black Sedan]

you can calculate this online. It will be a very accurate estimation because with a lockup converter, there is no converter slip. Factor in tire size, overdrive of around 0.7:1.... you don't need someone to drive down the road for this


Okay here you go:

3.55 gears
@75 mph, 2190 rpm
@90 mph, 2627 rpm

3.73 gears (which I have as well in the MM)
@75 mph, 2301 rpm
@90 mph, 2761 rpm

4.10 gears
@75 mph, 2529 rpm
@90 mph, 3035 rpm

So 228 rpm increase at 75 mph, going from 3.73 to 4.10

[Dragcity]

I have my 3 to 4 shift happening at 125 MPH at 60% Throttle.

I suspect it could do about 135 in third......If you set the tune to allow it.

75 MPH is just under 2,500 RPM in 4th gear and torque converter lock-up

90 MPH, I don't know, we are not allowed to drive that fast in New York. There is a an extra tax for that......

I'll see if I get the opportunity to "test" it on the way home.

[ctrlraven]

Interesting. I do about 70% highway driving and at 70mph I'm at 1782rpm (datalogged) with 3.55 gears and 3500 stall locked. I also have 255/55-18 rears which give me an effective 3.50 rear gear ratio. With my street tires and 4.10s I should be around 4.04 effective rear gear..

Oh well I'll see how they work out on the highway if its chuggin the gas I'll just hit the back roads.

[magindat]

http://www.magindat.net/ssm/info/4r70wratios.xls

requires microsoft excel

[Vortech347]

Excellent....

Anyone here regret doing 4.10's? because of freeway driving?

[sd8683]

Excellent....

Anyone here regret doing 4.10's? because of freeway driving?

Nope, not I

[magindat]

Excellent....

Anyone here regret doing 4.10's? because of freeway driving?

Sometimes - but only because it's blown now. The 4.10's are the perfect addition when NA. If I'd have known I could have afforded a blower in the future, I may have stayed 3.55.

[Vortech347]

I totally understand that. My wife's cobra will get 3.73's and we'll yank the 4.30's when we put a blower on that car.

Okay thanks guys. Once I get the new MM I'll slap some 4.10's in it.

[sd8683]

I totally understand that. My wife's cobra will get 3.73's and we'll yank the 4.30's when we put a blower on that car.

Okay thanks guys. Once I get the new MM I'll slap some 4.10's in it.

You won't regret it!

[2,4shofast]

Matt let me know when your available and I will let you drive my MM with the 4.10's and see how you like it.:beer:

[Vortech347]

OH YEAH!! I've been meaning to call but between all the crap I've been trying to work on I havn't had time. I'm definatly game though. I'll give ya a call soon.

[Fourth Horseman]

OH YEAH!! I've been meaning to call but between all the crap I've been trying to work on I havn't had time. I'm definatly game though. I'll give ya a call soon.

Same here man, I'll throw you my keys any time if you want to see what the 4.10s are like.

[Vortech347]

Alright thats it. I'm skipping work tomorrow to go play with other peoples Marauders.. hahahah

In a perfect world.

[SC Cheesehead]

Nope, not I

+1, changing to 4:10's is one of the best mods I've made. Big increase in performance, minimal impact on gas mileage, definitely the way to go if running N/A.

[ctrlraven]

Gas prices are going way down around here, def. need 4.10s to take advantage of this cheaper gas I can waste lol.

[Vortech347]

Nice! Our state is still gouging us pretty bad. 4.35 for 91'

[sd8683]

I paid $4.06 today for 93 octane at shell

[ctrlraven]

The cheapest around me that I have seen is $3.95 for 93 at a Shell station. The most I have had paid was $4.39 for 93 so far this year.

[2,4shofast]

Alright thats it. I'm skipping work tomorrow to go play with other peoples Marauders.. hahahah

In a perfect world.


I'll let you call my boss for me...ha ha:D