4.10 gears - Northern California Ford Owners

This is topic 4.10 gears in forum Tech Talk at Northern California Ford Owners .

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Posted by saclve (Member # 13280) on :

Looking to put some 4.10 gears in my 98 gt vert 5spd. I'm wondering is my best bet getting a full install kit from am.com for $255 or ?? Also how much should I pay to have them installed ...

Posted by 79 cobra (Member # 10137) on :

Advanced auto in san ramon $250 for labor

Posted by saclve (Member # 13280) on :

quote:
Originally posted by 79 cobra:
Advanced auto in san ramon $250 for labor

Thats not bad . Where is san Ramon ? Lol ill map quest it

Posted by Tom Renzo (Member # 13165) on :

Personally if it is 5 forward i would use a 3.73 final drive. If it is an auto go for the 4.10. Just me

Posted by saclve (Member # 13280) on :

quote:
Originally posted by Tom Renzo:
Personally if it is 5 forward i would use a 3.73 final drive. If it is an auto go for the 4.10. Just me

That was my first plan 3.73 but then all these darn reviews got to me I've heard nothing bad about them but people keep saying go with 4.10. But think I might go with 3.73 if that keeps her highway friendly. It is not my daily driver and plan to make street legal Wednesday now and then so as long as the 3.73 make a big diff ill be happy

Posted by SS_Super_Stang (Member # 11510) on :

410s suck. I hate them in my 94. I'm planning on doin 373s

Posted by SLOW95GTS (Member # 10365) on :

only problem with the 4.10's is your top speed and cruising rpm with be high, but the modular need the gear because they have less torque than pushrod motors.

If you just want to cruise and get on it a couple of times - 3.73

If your really into drag, and want to make it fast N/A - 4.10

Posted by saclve (Member # 13280) on :

Well I would like to be in the mid 13's after full pi swap and gears so .. the 4.10s sound good for strictly street driving and track.. so guess I should go back to original plan of 3.73 will they make a big diff over stock gearing or what should I expect ?

Posted by SLOW95GTS (Member # 10365) on :

You should be in the 13's even with 3.27's but since you have a heavy convertible your better off with 4.10's and it would be a world of difference.

Posted by saclve (Member # 13280) on :

quote:
Originally posted by SLOW95GTS:
You should be in the 13's even with 3.27's but since you have a heavy convertible your better off with 4.10's and it would be a world of difference.

What do you think it would run with 4.10s and exhaust & cai before the swap ? Im thinking mid 14s before mid 13s after ..

Posted by SLOW95GTS (Member # 10365) on :

High 14's low 15's on street tires. 13's when you do the swap.

Posted by RickRock98 (Member # 13242) on :

I have a 98 convertible w/ a full PI swap (long block) w/ full bolt-ons, no tune, running 3.73s. I run 13.6 on drag radials.... so if all you want is mid 13s 3.73s will get you there no problem. After I tune it I'm expecting to drop another tenth of a second (0.1) if not hopefully 2 tenths.

Posted by saclve (Member # 13280) on :

quote:
Originally posted by RickRock98:
I have a 98 convertible w/ a full PI swap (long block) w/ full bolt-ons, no tune, running 3.73s. I run 13.6 on drag radials.... so if all you want is mid 13s 3.73s will get you there no problem. After I tune it I'm expecting to drop another tenth of a second (0.1) if not hopefully 2 tenths.

Awsome I plan on doing gears, short shifter, stage 2 clutch, underdrive pulleys, full pi swap. (If not full pi motor swap) . And eventually a tune or maybe a tuner . 13.6 is a decent time for a slow ol 2v mod motor yea im sure you will drop a vouple tenths with a good tune 13.4 is nearly stock terminator/coyote numbers

Posted by 90 7up lx (Member # 10304) on :

U got a covertible......

3.90s or 4.10s ftw

Posted by saclve (Member # 13280) on :

quote:
Originally posted by 90 7up lx:
U got a covertible......

3.90s or 4.10s ftw

Yes I have 98 gt vert 5spd , sounds like those are the gears i wan
If im going to be running at track alot . But the 3.73 seem like better all around. 3.90 huh ? Hmm I need to look those up kinda in between

Posted by RickRock98 (Member # 13242) on :

The only thing I would chance on my set up and I recommend you do. Is use you original 98 block w/ the PI head swap. It nets you a higher compression. But the bad thing is that it won't pass smog. If you care about that kind of thing. [Smile]

Posted by saclve (Member # 13280) on :

quote:
Originally posted by RickRock98:
The only thing I would chance on my set up and I recommend you do. Is use you original 98 block w/ the PI head swap. It nets you a higher compression. But the bad thing is that it won't pass smog. If you care about that kind of thing.

The full pi swap kills the emissions ? Damn that sucks as long as I can get my tags i could care less about all that I am running offroad x pipe but that can easily be switched. I was going to do the pi heads cams and intake around feb-march.. but I can get a lower mile pi motor for about $1k and sell my npi motor for $500 or so

Posted by fredfifty (Member # 10320) on :

i havent had a problem driving around with 410s in my fox vert aod, im pretty satisfied with em. as far as advanced auto, if your inquiring about if they do sidework, last i heard he doesnt do it anymore (dan) and thats too bad because he did a great job on mines for an excellent labor price.

Posted by SacStangDriver (Member # 8304) on :

I do gears. Located in Sacramento

Posted by saclve (Member # 13280) on :

quote:
Originally posted by SacStangDriver:
I do gears. Located in Sacramento

How much do you charge for that ? And i already have your number saved because i will be contacting you late feb early march to do my pi swap

Posted by Tom Renzo (Member # 13165) on :

quote:
Originally posted by SS_Super_Stang:
410s suck. I hate them in my 94. I'm planning on doin 373s

You are correct my friend because the early mustangs only have 5 speeders. I normally use 4.10 gears with 6 speeders. Example my WS 6 LTI is turbo charged and i used 3.73 gears in that because of the longer shift times and spool events. But in any of my other LS powered cars i use 4.10 final drives. It depends on the application. 3.73 is a good compromise as i pointed out for 5 forward on a ford that is basically not a revver. If you were talking 6 speeder different animal. But like i said with an auto 4.11 i9s where it is at. They are close and either will be good

[ 2013-12-20, 02:12 AM: Message edited by: Tom Renzo ]

Posted by 79 cobra (Member # 10137) on :

4:10 and 100 wet shot call it a day

Posted by 98 ROUSH (Member # 10309) on :

4.10s!

Posted by vortek01gt (Member # 10149) on :

2vs benefit from more gear due to lack of torque. As stated before different setups need different gearing. I also had 410s in my old 94 gt and it was like driving on ice and first gear was usually useless, but 410 in my 2v work amazing. Hell, if you have a good enough tire then go 430s.

[ 2013-12-24, 05:18 AM: Message edited by: vortek01gt ]

Posted by 79 cobra (Member # 10137) on :

4:56 dont fear the gear

Posted by Built88LX (Member # 10758) on :

4.10 if you got 2v motor

[ 2013-12-31, 11:24 AM: Message edited by: Built88LX ]

Posted by 70stang351w (Member # 9948) on :

quote:
Originally posted by SacStangDriver:
I do gears. Located in Sacramento

Posted by saclve (Member # 13280) on :

quote:
Originally posted by Built88LX:
4.10 if you got 2v motor

Yea sticking with the 2v motor maybe upgrade to newer pi motor instead of pi head swap... and those gears will work wondrs from the sound of it .. . So what is that 4+ for 4.10 and 1+ for the 3.73 haha

Posted by MaK_1967v8 (Member # 12187) on :

4.10s on a 2v. if you plan on FI someday, I'd go 3.55s or 3.73s though.

Posted by saclve (Member # 13280) on :

quote:
Originally posted by RickRock98:
The only thing I would chance on my set up and I recommend you do. Is use you original 98 block w/ the PI head swap. It nets you a higher compression. But the bad thing is that it won't pass smog. If you care about that kind of thing.

Thinking I could just get it smogged b4 I do the swap here next month.. but what kills its ability to pass smog ?? The slight bump in compression ??

Posted by Beastly GT500 TVS (Member # 9723) on :

Does anyone actually have real info why the PI head swap doesn't pass smog? The cars that fail. Do they fail because they are not burning clean? Is it the tune the causes it to fail? Im not sure why this swap would cause a fail unless its a visual thing. Also the compression would be higher but also needs to run 91 to keep from detonation.

Posted by saclve (Member # 13280) on :

quote:
Originally posted by Beastly GT500 TVS:
Does anyone actually have real info why the PI head swap doesn't pass smog? The cars that fail. Do they fail because they are not burning clean? Is it the tune the causes it to fail? Im not sure why this swap would cause a fail unless its a visual thing. Also the compression would be higher but also needs to run 91 to keep from detonation.

Thats what im trying to figure out myself because I cannot find any solid information on what causes it to fail ? Ive had several people tell me it will pass the sniffer but not sure

Posted by Beastly GT500 TVS (Member # 9723) on :

quote:
Originally posted by saclve:

quote:
Originally posted by Beastly GT500 TVS:
Does anyone actually have real info why the PI head swap doesn't pass smog? The cars that fail. Do they fail because they are not burning clean? Is it the tune the causes it to fail? Im not sure why this swap would cause a fail unless its a visual thing. Also the compression would be higher but also needs to run 91 to keep from detonation.
Thats what im trying to figure out myself because I cannot find any solid information on what causes it to fail ? Ive had several people tell me it will pass the sniffer but not sure

I have done a search and come up with no valid info. All the guys either don't smog or fail because of aftermarket parts nothing related to the PI swap causing a fail smog

Posted by 90 7up lx (Member # 10304) on :

Hit up 98roush he has a lot of information on the pi swap

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