Can I put my new 4.10 rear axle housing onto a new 5.0?

[beefcake]

Every ones got an opinion but I would gear it to trap in 4th.
That means 3.55 or 3.73 depending on density altitude.

If you gear it to trap in 5th you need either 4.56 or 4.88.
2nd is 2.43 which is the same as 1st in a Top Loader 4-speed.
If you gear it this way I would not be suprised if the car is quicker launching in 2nd.
1-2 shifts at 45' are awful early.

3.66 x 4.88 = 17.86
Thats the same as a 5.28 in a 2010.

PS I ordered my car with 3.55 since I run at a DA well below sea level in the winter.

i'm of the same thought for the manual car, top of 4th,

i don't think anyone is that good to be trying to nail 5th on a powershift lol

 

[hawkeye18]

There is just something fundamentally wrong about having to powershift into 5th!

 

[beefcake]

There is just something fundamentally wrong about having to powershift into 5th!

lol, agreed 100%

 

[pacettr]

Don't fear the gear!!!

 

[19COBRA93]

There is just something fundamentally wrong about having to powershift into 5th!

That's because you guys are stuck in the "5th is an overdrive" mentality.

I'd gear it to cross the line in 5th and launch it like godzilla is behind me. 5th is 1:1 just like 4th was so whatever RPM you crossed the line at with 4.10's before, won't change now. Except now you have a higher usable RPM band.

The only real difference is with the '11 you'll have a deeper first gear, and you'll have an extra shift. If you gear the car to cross in 3rd gear, I think you're leaving some performance on the table.

Everything I'm posting about here is specific to drag racing with slicks. Any other type of driving would probably need a different gearing.

 

[hawkeye18]

lol, agreed 100%

Hey, don't I know you from somewhere?

 

[irishpwr46]

i say no. the 5.0 is .4 liters more than the 4.6. taking this into account, you will need to add that .4 to the 4.10s, therefore ending up with a 4.50 final drive ratio....

 

[19COBRA93]

i say no. the 5.0 is .4 liters more than the 4.6. taking this into account, you will need to add that .4 to the 4.10s, therefore ending up with a 4.50 final drive ratio....

LOL, what? Engine size has nothing to do with the gear ratio.

For anyone wondering, the 2011 GT uses the exact same axle housing as all 05-10 GT/GT500. Which means anything from the prior models will bolt in without a problem.

As far as the 4.10's, with a 7000 rpm rev limiter, you'll still have more usable RPM than the prior 3V as well, so I don't see why anyone would thing they'll be too low. 1st gear is 3.66 which combined with the 7k powerband, you're no different in MPH than the prior model as well.

No big deal.

 

[2011CS]

There was a person earlier talking about a boosted car running 4:10's and how he prefers drag radials and that he can hook up so don't fear the gear. A summary of course

He is right that you can hook up, because what he is saying is if his car can do it there will be no issue with the 5.0's, he is using torque multiplication as an example without actually stating it.

Take your torque at the flywheel and multiply it by the first gear ratio and multiply that total by the rear end ration to get your first gear "at the wheel" torque.

Using 400lbs x a first gear ratio of 2.50 to one equals 1000 ft lbs of torque times 3:73 equals 3730 ft lbs of torque going to the two rear wheels. This is not accounting for the torque band curve or driveline loss or tire height modifying the final drive ratio...just numbers.

So using the 5.0 gears in a 6spd standard vs 4.6 and 5spd

5.0

390ft lbs x 3.66 = 1427.40 x 4:10 = 5852 final torque output

4.6 (stock 2010) 325ft lbs x 3.38 = 1098.5 x 4:10 = 4503 final torque output

blown 4.6 assuming 400TQ Roush 400ft lbs x 3.38 = 1352 x 4:10 = 5543 FTO
blown 4.6 assuming 475TQ Whipple 475ft lbs x 3.38 = 1605 x 4:10 = 6582 FTO

If he can hook up 700 more final torque output, then you can run 4:10's in a 5.0 without issue....

That being said I had a 2007 GT with 4:30's no blower and 1st gear was uselessly short on factory height street tires.

A blown 5.0??

Scary!