Thoughts guys...4.09:1 gears or the FRPP Power kit for my 2020 Mustang GT PP1 manual

[Superspirit]

Yes rear gears do increase torque to the wheels. Glad your happy, I'm still waiting for mine too arrive.

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[Dave2013M3]

My problem was finally taken care of. It was the tune all along everything else was done correctly. I just don’t get why the Lund rep I talked to said it was the bdm not the pcm so it wasn’t the tunes issue. But I guess he doesn’t know what he’s talking about. But now that I can drive it normal it’s a totally different ride, I fish tailed in 3rd gear. The pick up now is amazing with the 4.09 gears. Btw do gears give you more torque or is it all about the rpms? But it’s really fun to drive it now.

Yes more torque to the wheels as it has a higher torque multiplication.

 

[AZ18yote]

Yes more torque to the wheels as it has a higher torque multiplication.

Also lowers top speed though, possible extra shift towards the end of your 1/4 mile, alters mpg etc. But for a manual dd just looking for a stronger low and mid it does the trick for sure.

 

[Dave2013M3]

Also lowers top speed though, possible extra shift towards the end of your 1/4 mile, alters mpg etc. But for a manual dd just looking for a stronger low and mid it does the trick for sure.

There is no real downside to a 4.09:1 for the manual. You would still have to shift into 4th before the end of a 1/4 mile run at least now you deep into 4th and you have all that torque multiplication. Also you can never hit the real topspeed of a manual 6spd Mustang anyway. 4th will get you to 145mph and 5th all the way to 180mph. Here is what the new speeds in gear would look like.

 

[Rpinaiii]

@Marketplaza you have manual non PP1. So you had 3.55 gears and went to 4.09, correct? Good to hear you like how it feels. I have same but I think 3.73 will do the trick for me personally. Let us know how regular daily driving is with 4.09, Especially on the highway. I just want a little more kick in acceleration, I dont drag race, mainly street.

 

[Rpinaiii]

Also, I thought gears don't actually change the torque, they just manipulate them. Will torque #s actually change on a dyno after increasing gears?

 

[Dave2013M3]

Also, I thought gears don't actually change the torque, they just manipulate them. Will torque #s actually change on a dyno after increasing gears?

Correct, its increasing torque to the wheels due to mechanical torque multiplication

 

[Dave2013M3]

@Marketplaza you have manual non PP1. So you had 3.55 gears and went to 4.09, correct? Good to hear you like how it feels. I have same but I think 3.73 will do the trick for me personally. Let us know how regular daily driving is with 4.09, Especially on the highway. I just want a little more kick in acceleration, I dont drag race, mainly street.

If your car is a manual the change from 3.55 to 3.73 is very slight, and you probably won't even notice it. If you are going through the expense go with the 4.09s.

 

[Rpinaiii]

If your car is a manual the change from 3.55 to 3.73 is very slight, and you probably won't even notice it. If you are going through the expense go with the 4.09s.

Yeah, I think due to costs I would be pissed if there wasnt much difference. So, your probably right, maybe 4.09 would be best. I just dont want to drive on highway with gears or engine humming in high RPMs all the time, I guess I would finally use 6th gear though lol

 

[Dave2013M3]

Yeah, I think due to costs I would be pissed if there wasnt much difference. So, your probably right, maybe 4.09 would be best. I just dont want to drive on highway with gears or engine humming in high RPMs all the time, I guess I would finally use 6th gear though lol

You will be fine due to the MT82D4 having 2 overdrive gears.

 

[Rpinaiii]

Hi just to make sure, does the 4.09 gears fit in the 3.55 stock differential and does the speedometer need to be recalibrated when changing gears on an 18+ Mustang GT? Thanks.

 

[Dave2013M3]

Hi just to make sure, does the 4.09 gears fit in the 3.55 stock differential and does the speedometer need to be recalibrated when changing gears on an 18+ Mustang GT? Thanks.

No issues

 

[Rpinaiii]

^^^ Ok great I will start pricing around here in SA. So I am thinking like $1,000 range, correct? What would be considered too high and excessive $?

 

[Superspirit]

If your in San Antonio contact me, I know a guy that does great gear work. Wished I still lived there so I could get him to do mine.

 

[Rpinaiii]

If your in San Antonio contact me, I know a guy that does great gear work. Wished I still lived there so I could get him to do mine.

Ok cool. I'll PM you my cell #.

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