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Discussion Starter #1 (Edited)
Wow! It really made a difference. GTs should come STOCK with 4.10s!
After driving it home and then letting it rip on an empty street, my thoughts were, "I should have got 4.30s! :( "

For all you people with 4.6s wondering whether to go with 3.73s or 4.10s, get 4.10s AT THE VERY LEAST!

The #1 reason people get 3.73s OVER 4.10s, "I do a lot of highway driving!" Well, I live in the Los Angeles, CA. area and ALL WE DO IS HIGHWAY DRIVING. (except if we wanna look cool, then we drive up and down the Sunset strip :cool: ) Despite the 4.10 gears I AM going to get at least 290 miles per tank, but I am betting on over 300. With my stock 3.27s I received well over 300 miles per tank.

I want to say thanks to RAVENGT and my personal friends Kevin and Matt for setting me straight on 4.10s over 3.73s.


I want to end with a picture that I believe (I might be wrong?) RAVENGT posted when I asked the usual, "3.73s vs 4.10s" question.

 

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3.73 or 4.10

Do i go 4.10's with a blown automatic? help.
 

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Discussion Starter #4 (Edited)
Do you have a Dynosheet that shows your powerband? I am thinking that full boost kicks in around 5400-5800 RPMs (roughly)?
Honestly I am not sure about 4.10s on a Blown car. I would say 3.73s for a blown application. But still look for more responces from people here who DO HAVE 3.73s/4.10s with Centrifugal blowers.
 

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ah....

i do have a dyno sheet....powerband and full boost comes at 5700 and 10lbs. ...four speed auto.
 

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even with an automatic

blown auto and a 4.10. any sugg. im thinkn' 3.73's ......help
 

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I actually wasn't happy enough with just the 4.10's with my blower, so I bought a 3000rpm torque converter:D Seriously, don't waste your time on 3.73's with or without a blower. I simply did not really even notice the difference with the 3.73's. I agree, N/A 4.10's aren't even enough AT ALL!!!!!! When I was N/A, I was mad that I didn't get 4.30's too, but I'm not too sure they've got a good setup for 4.30's as far as shift points, shift tables etc. for automatics on the 99+ so I stuck with 4.10's. If they did I probably would have gotten 4.30's even with the superhcarger, but they have really worked hard on the 4.10 programs so I wanted to be safe.

rob
 

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i run 4.30s in my cobra... ill be migrating to 4.56's w/ my eaton posi unit and 31 splines... my new heads/cams combo will allow the motor to rev aroubd 8k... so on the squeeze ill be fine through the traps... joe 4.10s will show you about .5 pickup in the 1/4.. i went from 13.8x stock to 13.40's with just gears stock....
 
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