What gears do I need?

[XLRVIII]

3.07 to 3.73 is a 0.66 ratio change
(not worth the expense or effort IMHO)
3.27 to 4.10 is a 0.83
(a little better but still not worth the expense or effort)
3.27 to 4.30 is a 1.03
(making a full ratio change is what makes doing gears WORTH the effort)

3.07 to 4.10 = 1.03
3.27 to 4.30 = 1.03

 

[fatboyq]

how much is a SCT tuner?
93 driveshaft where the heck can you find one nowadays?

I have access to 3.73 or 4.10 gears for $90 and I know a guy who installs gears on 8.8 ford rear ends for $215 including fluids, friction modifier etc..

Im looking at over $300 for gears and install
just need to price out SCT tuner and 93 driveshaft... maybe in late summer I will have the money for it all.

 

[Markviiiedrea]

fatboyq, dont forget a posi ($200.00) other wise you just get a nice smoke show from one side of the car.

 

[Markviiiedrea]

Car-part.com for a drive shaft, and start looking in the yards or ebay if you want to get raped on a price.

 

[IllinoisMarkVIII]

I have a 93 driveshaft fatboyq.....i am in the bloomington area.

 

[slowmkviii]

373's are an absolute minimum for a base model Mark 8



I did further research and found the 410's would have been a better swap for the 307 car.

With that said, if you have a 327 LSC then you'd be stupid to put 373's in and 410's would be "barely" worth the effort.

on a 327 car the best all around performance is going to come from a 430 gear.



QUOTE]

what does base or LSC have anything to do with this they both have a .69 OD
I have 3.55s and want 3.73s I like to set the cruise at 80 my vote is 3.73s

 

[kustomizingkid]

3.73's are a WASTE...

 

[CobraStar_LS8]

people say 4.10s is wasting gas but I see many of us are still seeing MPGs in the 20s...so no reason to say 4.10 is not for daily driving

 

[slowmkviii]

people say 4.10s is wasting gas but I see many of us are still seeing MPGs in the 20s...so no reason to say 4.10 is not for daily driving

so there is no difference between 30mpg on a trip and 20

 

[kustomizingkid]

Who is getting 30mpg with 3.73's??

 

[MediumD]

what does base or LSC have anything to do with this they both have a .69 OD

You're right. Base vs LSC shouldn't have anything to do with gear choice, IMO, they have the same exact drivetrain except for what's in the diff... All he's saying is just that a 'full ratio change' is what you'll really feel, and it takes more to feel the difference in an LSC coming from 3.27s.

 

[MediumD]

BUT..you really will want to "mess" with a SCT tuner, because the shift shedule is going to be "compressed" for lack of a better term.

it's going to hit it's MPH based shift points sooner than before, and your probably gonna wind up in 4th gear at some stupid 32-34 mph when driving around town.

when I went to 373's the shift schedule got messed up a bit, I'm pretty sure 410's are only gonna be worse.

I must add, that I drove my car with a tune that was set up for the stock gears for about a year. it "wasn't all that bad".

But the car picked up quite a bit at the dragstrip and got alot "happier" on the street when I made the changes for the gears in the tune.

True, however in my personal opinion, I like the shift schedule with 4.10s and no changes in the tune. It will shift into OD at 27mph, and it doesn't bother me, doesn't lug the motor with the way I drive... My only complaint is that it holds onto second for too long. I do, however, think that if my trans weren't J-modded it would be a problem.

 

[XLRVIII]

what does base or LSC have anything to do with this they both have a .69 OD

you really typed that?

you think that going from a 307 gear to a 410 gear is gonna to be the "same" as swapping from a 327 to 410?

the "end result" will be the same.. DUH..

but the person swapping from 307 to 410 is going to be much more impressed/happy than the person going from 327 to 410.

 

[XLRVIII]

True, however in my personal opinion, I like the shift schedule with 4.10s and no changes in the tune. It will shift into OD at 27mph, and it doesn't bother me, doesn't lug the motor with the way I drive... My only complaint is that it holds onto second for too long. I do, however, think that if my trans weren't J-modded it would be a problem.

the Jmod does not affect your "shift schedule"..that's ludicrious at best.

saying you LIKE the screwed up shift schedule in the first half of the paragraph then confirming it's screwed up in the second part of the paragraph..
haha

P.S. 4th gear at 27 MPH is not correct, it's not how your car is supposed to work.

 

[Speed Demon]

Curious, has anyone here wanted 3.55 or 3.73 and went with the 4.10 and been disappointed? Still not convinced. I hear all the guys saying they can go 80 mph no problem, but average slower. I prefer to average closer to 90, I just don't think 'cruising' at 3500+ would be good. Now just over 2k at 90 seems perfect. I think I need to go for a ride in a geared Mark.

 

[slowmkviii]

you really typed that?

you think that going from a 307 gear to a 410 gear is gonna to be the "same" as swapping from a 327 to 410?

the "end result" will be the same.. DUH..

but the person swapping from 307 to 410 is going to be much more impressed/happy than the person going from 327 to 410.

so now we hare going to mod our cars by the feel you get
real smart
if you want tall gears and you have a base you should go for less performance cause you start with less I feel like im getting smarter by the second

and for speed demon Eric sold his 4.10s and is going to get 3.73s

 

[Frogman]

This thread is like the "what kind of pistol should I get" threads. You'll get a hundred opinions from 75 people.

 

[Rich88LSC]

4.11's are soooooo tall, and anything over thats just :q:q:q:qing stupid insane for a daily driver. If high ass gears were that good, then factory stock muscle cars would have come with them. And the old days are gone old timer, we don't need gears like that anymore. Hell a piece of crap minivan can run the quarter in the same time some of the old muscle cars used to nowadays. 3.73 is the all around perfect combo, seeing as most of us aren't using the drag strip weekly, or even monthly most likely.

First off plenty of old school muscle cars could be ordered with 4.xx gears from the factory and how many could you get an OD trans? Now gas mileage is a big concern for automakers so no your not going to see ratios like that off the showroom floor on very many cars. Take the .69 overdrive ratio someone mentioned for the 4R70w and with 4.56 gears you are very close to the same rpm as a 3.27/3.07 geared non OD car.

 

[MediumD]

the Jmod does not affect your "shift schedule"..that's ludicrious at best.

saying you LIKE the screwed up shift schedule in the first half of the paragraph then confirming it's screwed up in the second part of the paragraph..
haha

P.S. 4th gear at 27 MPH is not correct, it's not how your car is supposed to work.

Of course the Jmod doesn't affect the shift schedule, I didn't say that. I'm saying it affects how quickly the actual shift takes place after the shift is commanded. If it weren't JModded, it would take longer to shift, which would make it hold onto a gear for longer.

My car isn't "supposed" to do a lot of things it does, it's not supposed to have HIDs, it's not supposed to have a computer in the glove box, it's not supposed to have 4.10 gears, etc. But it does, and it's fine with me, except that it holds second longer than I'd like - of course it did that before the gears as well.

27mph in 4th is fine with me, the only time I'll see that speed is when I'm maintaining speed in a residential zone. And that's my ONLY complaint - pretty different than saying it's "screwed up."

This thread is like the "what kind of pistol should I get" threads. You'll get a hundred opinions from 75 people.

40 S&W for the primary, 9mm for the backup.

 

[playboy4aday]

You guys are starting to go way off the topic. But while we are at it my gear guy called and said that my car has an open diff , but he has a trac-lok there . He calls later to inform me that it will not work .WTF! Do out cars need a different type of trac-lok or what. He said with it in the axels wont go in right yet both are 28 spline, but here is about a 1/4 inch difference.

 

[98LSC32V]

You guys are starting to go way off the topic. But while we are at it my gear guy called and said that my car has an open diff , but he has a trac-lok there . He calls later to inform me that it will not work .WTF! Do out cars need a different type of trac-lok or what. He said with it in the axels wont go in right yet both are 28 spline, but here is about a 1/4 inch difference.

I have a 92 mustang gt trac-loc in mine, it works...

 

[kustomizingkid]

You can put any tlock in, if you leave the snap rings off the axles...

 

[driller]

You can put any tlock in, if you leave the snap rings off the axles...

X 2

I can't tell you how many people over the years I've seen go with less than 4.10s wish they had gone with 4.10s or more. But almost no one regrets going from stock gears to 4.10s or even higher.

Do the math and you will easily see any track driven naturally aspirated Mark VIII needs 4.56 gears. However, if you drive on the highway much, 4.30s is a good compromise. If my '93 was trailered full time, it would have 4.56s hands down. There is no issue whatsoever with 4.10s on the highway.

Mileage? With 4.30s on the highway I can get 23 mpg. I can drive 2 hours through the mountains to the track, run at the track all day and drive back through the mountains and STILL average 19 mpg.

 

[Rich88LSC]

X 2

I can't tell you how many people over the years I've seen go with less than 4.10s wish they had gone with 4.10s or more. But almost no one regrets going from stock gears to 4.10s or even higher.

Do the math and you will easily see any track driven naturally aspirated Mark VIII needs 4.56 gears. However, if you drive on the highway much, 4.30s is a good compromise. If my '93 was trailered full time, it would have 4.56s hands down. There is no issue whatsoever with 4.10s on the highway.

Mileage? With 4.30s on the highway I can get 23 mpg. I can drive 2 hours through the mountains to the track, run at the track all day and drive back through the mountains and STILL average 19 mpg.

+1

I drive 100 miles through NYC to get to the nearest track with no issues. I will be going to 4.56s eventually

 

[timothyr]

in as much as this thread did drift a bit I will say I am (as an observer) very happy with the information given....after doing all of the math I was seriously thinking that 4.56's would be just about right (based on other threads I was contemplating going with 4.30's), and the GV would allow me to keep it at a reasonable rpm on the highway.

In a word, being new to this forum, I am very impressed