4.10 gears

[kwheels636]

I hear everyone talking about getting the 4.10 gears done to their cars, before i do this I was wondering, what affect am i having on the car? Sorry if its a lame question. lol but seriously, how much does this help? and how much should i be paying? Thanks!

[freakstatus]

4.10 gears are smaller than your stock 3.55's therefore faster off the line as your car will get a quicker boost...like pedaling a bike....easier at the start in a higher gear.

[Pat]

What ^^^^^he said. Cost, parts and labor, about $700.00

Ask yourself, "what do I want from this car"? We can be a lot more helpful if we knew where you intend to go in your quest for more performance (inferred from asking about gearing)

A good first step, even before gearing, is a reflash of your cars computer.

This costs about $400.00 and consists of a hand held device with installed Marauder performance parameters. Sold by vendors on this site.

Takes five minutes to reflash your car's computer using the underdash OBDII port connection. Don't even need a screwdriver. Port is located just under the dash facia to the right of the stearing column. An uncovered, rectangular electronic connector.

Evaluate the car's performace and then see if you want to go with lower gears.

[Wires]

I can tell the difference the lower gears make driving around town - from stoplight to stoplight. The car stays close to 2K RPM around town, a pretty good spot in the torque band.

In my opinion, the 3.55s are the ideal gear if one will ALWAYS be on the highway - no city driving at all.

4.10 gears are for cars that are mostly driven around town, with some highway trips. Even a long trip (several hours) is OK, but if I was ALWAYS on the highway, I think I'd want a lower crusing RPM.

4:25 gears are for cars that are almost always driven around town, with only brief highway trips.

4:55 gears are for cars that are NEVER on the highway - always in town.

That's just my "spread" others may move these down or up a notch - for example, some may be OK driving 4:25s on the highway for long periods, or some may think that 4.10s are too low for any highway travel.

It comes down to personal opinion, the best thing to do is tr drive one before you modify yours. (although I didn't do this)

Another thing to do is to compare RPMs for various speeds - I think the general rule is 500 RPM at about 65 from 3.55 to 4.1.

I made a spreadsheet for all speeds in all transmision gears, and decied that 4.10s would be OK. Luckily, I'm happy with the car.

Be sure to pick your wheel and tire first, as a 4.10 with one tire size may equal 3.90 with another.

(don't shoot me) I've thought about going to CV HP wheels and smaller (diamter) tires, but then the 4.10 would be too low - I'd have to go to 3.90.

Sorry for the book.

[KillJoy]

4.10's will increase acceleration at the expense of top speed. You can still go 130+ w/ 4.10's though ;)

Also, you will lose about 1mpg highway using 4.10's.

Most folks agree that the MM should have come with a Tune, and 4.10's.

:up:

KillJoy

[Darrin]

Most folks agree that the MM should have come with a Tune, and 4.10's.

:up:

KillJoy

I have to side with 'most folks' on this one. LOL

Darrin

[ckadiddle]

4.10s are on my list for the future when things settle out financially a bit.

[knine]

Woke up my slow blue they did

[RF Overlord]

4:25 gears are for cars that are almost always driven around town, with only brief highway trips.

4:55 gears are for cars that are NEVER on the highway - always in town.AFAIK, there are no 4.25 or 4.55 gear sets for the 8.8". Did you mean 4.30 and 4.56?

[kwheels636]

wow thanks alot for the input guys! By the sounds of things, the 4.10 will be the first thing i do to the car, because with the stock set up the car seems to be taking too long to accelerate!

[Wires]

AFAIK, there are no 4.25 or 4.55 gear sets for the 8.8". Did you mean 4.30 and 4.56?


Yes, I did mean 4.30 and 4.56.

With my memory, I'm lucky to have gotten that close.

[Jolly Roger]

3:55.1 = 14.97 E.T.
4:10.1 = 14.51 E.T.
My improvement by switching to the 4:10 gear.
NUFF SAID.;)

[RF Overlord]

With my memory, I'm lucky to have gotten that close.I know what you mean...some days I'm lucky to find my way home from work...

[RF Overlord]

kwheels, just remember that you can't simply replace the gear set and do nothing else. Well, you CAN, but your speedometer will be off, and your shift points will become way too early. You need to have the PCM reflashed to correct these things, so buying a tune should be first, then do the gears.

[SC Cheesehead]

kwheels, just remember that you can't simply replace the gear set and do nothing else. Well, you CAN, but your speedometer will be off, and your shift points will become way too early. You need to have the PCM reflashed to correct these things, so buying a tune should be first, then do the gears.


^^^^^^ What RF said. ^^^^^^

Get yourself a tune and a set of 4:10s installed and you'll swear you've got a whole new car. BIG diffreence in response, acceleration.

SCCH

[ImpalaSlayer]

i must do these 2 mods soon. really wana see the difference, well more like fell but w/e :D

[Aren Jay]

do they make variable gears? Like a 4.10 lower or first second gear and then a 3.55 third gear and then a 3.27 4th gear?

[mclum1]

I notice 4.10 seems to be the main jumping point from stock...is the 3.73 not a good compromise, or for the money is the 4.10just the best 'bang' for your money?

[rauder775]

Mclum1

My rule of the thumb has always been to go at least a :50 ratio difference to make it worth the work and expense. I changed my 2:73 Mustang gears to 3:27 and saw a nice bump, same w/ my mopar that was 3:23 and went to 3:91. Though, as others have said, depends on what you're after...

Been thinking the same thing about the gear switch. I'm frankly more concerned w/ the reflash of my computer. Had a very bad experience w/ my Durango (which now runs like crap)...very gun shy...

I assume the 4:10s would helps spins the tires better too...

Anybody had any problems??

[mclum1]

rauder775,

Thanks! That helps... I used to have a 02 MGM LSe, which I believe had 3.27 gears, and was about to go to the 3.73 gears, then I got my MM. This makes sense now, seeing the .50 (approx) jump in the MGM, but since the MM has 3.55 the 4.10 would be a noticeable change.

Thank you!!!! :beer:

[Pat]

Burn-outs

In my car, even after the tune (Lidio's) and the 4:10's, I couldn't spin the tires, just a bark and then a chirp from 1st to 2nd.

But after a 100 shot of laughing gas I could smoke those tires from here to Timbuktu.

[Local Boy]

Don't sweat it guys...

Jump on over...You will kick yourself for not doing (4:10's) sooner...

ALOHA

BTW: Pat is correct...without more mods it will just bark...not burn...the tires

But, bark is better than nothin at all!!!

[RF Overlord]

is the 3.73 not a good compromise, or for the money is the 4.10just the best 'bang' for your money?Going from 3.55 to 3.73 is only approx a 5% change...not worth the time and expense. 3.55 to 4.10 is almost 15%...as you said, the best bang for the money.

[kwheels636]

So im gonna go and get the gears done, and ask for what tune exactly? i like to pretend i know what im talking about with this. lol and how much will the gears and tune run me?

[freakstatus]

Order Lidios XCalibrator 2 from Alternative Auto (site vendor). He will load it up with 3 tunes. One for 4.10's. Will run you $400. Then you just plug it in and load the tune onto your cars computer...easy.

[Local Boy]

^^ +1 ^^ We have two vendors...Both are very good...

The tune will set your shift points and speedo correctly...add 4:10's and the there IS a noticable difference in your driving experience!!!

The one I got , lets me adjust a good number of parameters...

NICE...

ALOHA

[FormulaMarauder]

Let me tell you, when I had my 4.10's and a good tune in, I was amazed at the car. It was a whole 'nother animal. With my JLT, Kook's exhaust, gears and tune, I can burn my tires at 3/4 throttle from a dead stop without touching the brake all the way down the street. :burnout:.

[Vortech347]

Nothing wrong with 3.73's. I love mine. I went from 16.5 to 15.9 with the 3.73's, K&N cone, and a DR tune. (I'm at 7500-8000ft density air) I wouldn't mind for 4.10's but I had these 3.73's for a trade for the 3.55's that were in there. If this was a car I used AS my toy car. It would have 4.30's no doubt.....

[GreekGod]

...Consider a replacement driveshaft, driveshaft safety loop, and transmission extention housing mod to go with a 4.10 install. Better safe than sorry, even if it adds $1,000 to the price of the gear install.

[KillJoy]

transmission extention housing mod


A what?

:dunno:

KillJoy

[GreekGod]

A what?

Pressure feed of oil to extention housing bushing.

[KillJoy]

Pressure feed of oil to extention housing bushing.

Rear Lube Mod

:D

:up:

I get it now.

KillJoy