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post #1 of 20 (permalink) Old 10-04-2007, 03:54 PM Thread Starter
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4.10s or 4.30s

i got 3.73s on the car right now and im thinking i want to go up higher...

i barely drive the car on the freeway and its not going to anytime soon...its just a fun car so i want to go to a lower gear....

what do u guys recommend 4.10s or 4.30s? i talked to some guy that had 3.73s and went to 4.10s and he didnt notice that much of a difference exept a tad quicer off the line of coarse...

any comments? experiences with these gears?

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post #2 of 20 (permalink) Old 10-04-2007, 06:03 PM
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if you do go with anything higher than 3.73, you should have the forced lube mod, a better converter and a better driveshaft. And also, how do you plan on getting traction from a dig? I havent thought about that yet. I am staying with my 4.10's, but its really up to you

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post #3 of 20 (permalink) Old 10-04-2007, 06:39 PM Thread Starter
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i got a marauder TC on the car....and driveshaft still stocker...

plans are to get rid of the 4r70w and get a t56 that i almost have lined up for the car...6 gears with a 4 30 shouldnt be that bad....

then the hub swap is under plans also so that should give me a bigger variety of wheels and tires to go with that stick...

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1998 Mark VIII LSC Teredor Red, Parts car, PM me
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post #4 of 20 (permalink) Old 10-04-2007, 06:49 PM
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well.. if you go with a manual, 4:30 is a little tall. I wouldnt go above 3.73's with a stick. If you really launch it hard, you run the risk of breaking half shafts with a tall gear ratio.

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VT built block, fox lake PI heads
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post #5 of 20 (permalink) Old 10-04-2007, 07:35 PM Thread Starter
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ehh...u live once...half shafts can be replaced...lol

1997 MN12 Sport 4.6L Supercharged 5 Speed Sold
1998 Mark VIII LSC Teredor Red, Parts car, PM me
1998 Mark VIII LSC Pearl, Stock, Garage Queen
2000 Jeep XJ 4.0L Long Armed and Locked
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post #6 of 20 (permalink) Old 10-04-2007, 07:35 PM
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Quote:
Originally Posted by ZackG View Post
well.. if you go with a manual, 4:30 is a little tall. I wouldnt go above 3.73's with a stick. If you really launch it hard, you run the risk of breaking half shafts with a tall gear ratio.

4.30's are actually shorter than 3.73's not taller.

If you are using the LS1 T-56 then the 4.30's will work perfect and be great on the highway with the 0.50 6th gear.

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post #7 of 20 (permalink) Old 10-04-2007, 07:37 PM
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what's the forced lube mod? i've been running 4.11 gears for 3 years now without it or any problems
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post #8 of 20 (permalink) Old 10-04-2007, 07:44 PM
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its just a precautionary measure since there's more wear on the tailshaft in the tranny. Its's where you drill a hole in the tailshaft housing and run a line to it so fluid gets to the end of the transmission. and yeah, you're right, i thought i had the shorter/taller thing down, but i dont.

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post #9 of 20 (permalink) Old 10-04-2007, 09:23 PM
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3.90's

Hello

I have 3.90's in my car. I loose about 300rpm with 4.10's

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post #10 of 20 (permalink) Old 10-05-2007, 07:05 AM
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post #11 of 20 (permalink) Old 10-08-2007, 08:16 AM Thread Starter
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i got a set that i want to buy.... part number M4209-G430-M. would this fit? its for a 8.8 ford mustang rear end...

1997 MN12 Sport 4.6L Supercharged 5 Speed Sold
1998 Mark VIII LSC Teredor Red, Parts car, PM me
1998 Mark VIII LSC Pearl, Stock, Garage Queen
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post #12 of 20 (permalink) Old 10-08-2007, 08:36 PM
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need to know more than just a part # really. but

http://store.summitracing.com/egnsea...115+4294901314

any of those will work. I hear FRPP is easier to install. And you'll also need an install kit

http://store.summitracing.com/egnsea...115+4294901314

you probably want the ones that cost more than the $33 one.

97 Tbird 4.6
VT built block, fox lake PI heads
Vortech at XY psi
4.10's, KB boost a spark.
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post #13 of 20 (permalink) Old 10-08-2007, 08:42 PM
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Quote:
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i got a set that i want to buy.... part number M4209-G430-M. would this fit? its for a 8.8 ford mustang rear end...
I don't know about that M suffix, but the rest of the part number matches my 4.56 set.....except for the 430, which is of course 456 in my P/N.

If it's for an 8.8, it should work fine.

Mike

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post #14 of 20 (permalink) Old 10-08-2007, 10:07 PM
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M-4209-G410 was the P/N for the 4.10s when I bought them.

I think the -M suffix stand for the gears manufactured by Motive.
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post #15 of 20 (permalink) Old 10-08-2007, 10:12 PM Thread Starter
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well im about to get the 4.30s and i guess its recommened to get the install kit...ill have the pumpkin taken to a shop for them to do it and throw it on the car myself...

1997 MN12 Sport 4.6L Supercharged 5 Speed Sold
1998 Mark VIII LSC Teredor Red, Parts car, PM me
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post #16 of 20 (permalink) Old 10-09-2007, 05:33 AM
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sounds like a good plan. most shops charge around $200 to install gears (atleast around here they do)

97 Tbird 4.6
VT built block, fox lake PI heads
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4.10's, KB boost a spark.
Yummy.
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post #17 of 20 (permalink) Old 10-09-2007, 07:04 AM Thread Starter
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the thing is that i can do all the work myself, but iv heard that if you dont know what your doing when ur taking a differential apart; your in big trouble, or will be when u get it on the road...

1997 MN12 Sport 4.6L Supercharged 5 Speed Sold
1998 Mark VIII LSC Teredor Red, Parts car, PM me
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post #18 of 20 (permalink) Old 10-09-2007, 07:46 AM
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Quote:
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...if you dont know what your doing when ur taking a differential apart; your in big trouble, or will be when u get it on the road...
Quoted for truth. This is not a simple parts changer job, and if you don't know what you're doing, it's best left to someone who does.

Mike

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post #19 of 20 (permalink) Old 12-01-2007, 09:42 AM
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Yeah, don't do the work yourself unless you know what you're doing. You have to know what shims to use, how much to crush the one washer, and on and on.

But you could pull the pod from the car yourself, that's not too hard. Take it to a guy and tell him to swap the gears.

4.56's might be fun, but I'll stick to my 4.30's. Am pulling about 2500 rpm at about 65mph.

Because of the gears I don't really go over 65 anymore, and pretty much stay in the right lane for the little freeway driving I do. Other than that though, it's alot of fun to blow just about everybody away at a stop-light with only 1/2 throttle .

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post #20 of 20 (permalink) Old 12-01-2007, 02:17 PM
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ehh...u live once...half shafts can be replaced...lol
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