Questions about 4:10 gears! - Pontiac GTO Forum
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post #1 of 15 (permalink) Old 06-10-2010, 11:08 PM Thread Starter
 
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Questions about 4:10 gears!

will they fit in the 05 goats... automatic...?? i found some and i wanna put them in but idk! somebody help!

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post #2 of 15 (permalink) Old 06-11-2010, 04:08 AM
 
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I haven't heard about any that are out but if you did post a link please. Thinking about the 3.91's but 4.10's would be tempting.

<-- Guess which ones quicker?.....Nope! Not even close.
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post #3 of 15 (permalink) Old 06-11-2010, 07:59 AM
 
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Yes, they are made for the rearend, nothing to do with the tranny configuration. I would think 4.10's would be too much for the auto being that it has a 3.06 first. I would like to know how it would do people on the dragstrip.

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post #4 of 15 (permalink) Old 06-11-2010, 11:39 PM Thread Starter
 
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well i really want a lot of umph! so idk how my car would do with 4:10s...
would it be a good idea to get them?? i dont mind being a ginny pig..
what would be some problems i could possibly encounter with these gears??

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post #5 of 15 (permalink) Old 06-12-2010, 02:50 AM
 
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They are out! 4.10 would be better suited for a m6. Most with a4 use 3.73 and say they trap at a perfect rpm with them. It depends on what your using you car for. The only negatives to me would be lower m.p.g. and the motor reving higher.

<-- Guess which ones quicker?.....Nope! Not even close.
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post #6 of 15 (permalink) Old 06-12-2010, 06:00 AM
 
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Quote:
Originally Posted by 06gtoin216 View Post
They are out! 4.10 would be better suited for a m6. Most with a4 use 3.73 and say they trap at a perfect rpm with them. It depends on what your using you car for. The only negatives to me would be lower m.p.g. and the motor reving higher.

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Originally Posted by trackstar364 View Post
well i really want a lot of umph! so idk how my car would do with 4:10s...
would it be a good idea to get them?? i dont mind being a ginny pig..
what would be some problems i could possibly encounter with these gears??
Thats and expensive gunnia pig
I'm taking a shot in the dark, but if your going to drag race with these gears you may run the risk of shifting in 4th before the traps. Thats just my guess, I don't know anyone with 4.10's.



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post #7 of 15 (permalink) Old 06-19-2010, 12:06 PM
 
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3.91 would be a better choice for the track, Something else to consider would be lack of traction on the launch through 3rd gear, 4.10 would be great if your a manual 6-spd. Far as gas mileage it may suffer ever so slightly as long as you can keep your foot out of it, Another suggestion would be for you guys with A4's, Stall converter 3200-3800 stall, Best bang for the buck far as performance, and depending on type of stall your gas mileage isn't affected all that much, Combine the two for a winning combination, I ran the times in my sig with the stock gears and a vigilante 2800 stall, 3.91's and FTI 3800 stall are the next mods hopefully for that low 7 second pass in the 1/8 mile.

05 GTO/A4 Just some bolt ins 1.7461 60' 4.9649 330' 7.1500 594' 7.6440 1/8 mi. @ 91.10 mph.
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post #8 of 15 (permalink) Old 06-20-2010, 04:21 PM
 
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Not in a Automatic, the torque curve of the LS, a stall would be a much better, like was said 3;73's IMO would be low enough, if your running the quarter
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post #9 of 15 (permalink) Old 06-20-2010, 08:42 PM
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Even with a M6 my 3.91 are almost too much. With any kind of bump in power getting the car to hook is an issue. IMHO 4.10s would be overkill. On the highway the M6 and the lean cruise feature of the '04 LS1 keeps the gas mileage tolerable.

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post #10 of 15 (permalink) Old 06-21-2010, 05:57 PM
 
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I wouldn't personally go any higher than 3.7x without being able to hand pick my gear ratios. I'd do 3.91's in a heartbeat if I could get a transmission with a 2.4-2.2:1 1st gear like the old M21s and M22s. I must say the 5th-6th jump sucks with the 3.46, makes rolling at 50 awkward.
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