FRPP 3.73 gears...

[LegendLives]

Well Thursday I get my gears installed on my '05. Cant wait to feel the difference it makes. I know most people say 4.11 but I had 3.89's in my '65 Falcon and it was too low a gear for Interstate travel. So I thought/ hope these will be a nice compromise.

 

[Croft]

I just put in some 4.10s Brian. Cruising on the interstate isn't too bad. Do you have stock 3.55s or 3.31s?

 

[BullittWow]

Got 3.73's in my Bullitt from the factory, but switching to 4.10's in 2010. 5th gear drops the RPM's down for the e-way. But hey, 3.73 are a good all around gear.

Had a 1990 454SS pickup brand new. 3-speed auto w/ 3.73 gears. 3500rpm's at 65 mph!...and no overdrive plus 10 mpg.

 

[shatter]

I had 4.10s installed on Sunday. 70mph @ 2,400 rpm is good for me. I don't need to go any faster on the freeway and the motor isn't working hard at that rpm either.

Assuming you go from 3.55 to 3.73, I will be interested in how much of a difference you feel.

 

[Jeepngli]

Hey OP, I'll be interested in hearing what you think. I have 3.31's right now and I'm considering 3.73's or 4.10s(or something in between). You drive the car daily?

 

[Greg Hazlett]

I went from 331's to 410's this weekend and love them! They really woke the car up!

 

[LegendLives]

Hey all, I have the stock 3.31's in an A/T and I was looking for a good all around gear, I know the 4.10s would plant you back in the seat, lol. I guess tomorrow I will know if I made the right choice or not. I live right by the I-81 interstate so I will soon know what the rpms will be at say 70 mph w/ the overdrive. I know the '65 falcon was tachin 4 grand at 70 and 32 grand at 60 mph. I just didn't want that again but then it was a 4 speed stick and this is the 5 speed Auto. Dont get me wrong I loved the 3.89's. Laura the one time I had the Falcon at the strip (Mason-Dixon) on a drizzly test and tune day I got to make 3 passes w/ it. My 1st time on ever sitting at the Christmas tree.. I un-corked the Hookers, but was running w/ BF Goodrich TA radials, can you say learning curve? Long story short my 3rd run was 13.99 @ 100.5 mph. I would of loved to see what it would of run w/ slicks as coming out of the hole hard was a problem. It would just light em up. This spring I plan on going to Mason-Dixon and see what the stang will do... Here is my sorry ass w/ the Falcon

 

[Croft]

The Falcon is beautiful!


Brian, keep April in mind for Mason Dixon. That is when they usually start the private track rentals.

 

[LegendLives]

Well it finally cleared up here and is windy now so roads will be clear of of the slush and dry, Thank God, I didnt want to have to clean up the salt and crap after I got back home from the install. Laura I didnt know about track rental. Well I will get back tomorrow w/ my feedback...

Thanks Laura...

 

[Jeepngli]

What part of PA are you from? I'm near Morgantown WV, we all just went to Mason Dixon a few weeks ago. Much nicer than PRP.

 

[LegendLives]

What part of PA are you from? I'm near Morgantown WV, we all just went to Mason Dixon a few weeks ago. Much nicer than PRP.

In Greencastle here, just north of Hagerstown, MD.

 

[Jeepngli]

Sweet. I'll see you at Mason Dixon over the summer. Let me know if there's any mustang events going on. Its like 2 hours away for us, but better that PRP.

 

[gmantheman]

In your situation, I think you made a good choice going with 3.73s.

 

[LegendLives]

Well I just got back from the shop w/ the new gears.

First Impressions: I can definatly tell a difference from the 3.31's, now its not like a OMG difference but it is there none the less. I'm not like, CRAP I should of gotten the 4.11's either. I set my cruise @ 70mph this morning and it tach's 2000 and w/ the 3.73's it tach's 2500. At 60mph it tach's 2000 now. I did go from a slow roll, 5mph, and WOT and I like the response, goes thru the gears/shifts a lot quicker, but not so much were you feel like you lost 1st (as being too low). I would of like to have played w/ it some more but w/ traffic and the rural roads covered in cinders, I just brought her home and tucked it away for the time being.

 

[Shades]

Well I just got back from the shop w/ the new gears.

First Impressions: I can definatly tell a difference from the 3.31's, now its not like a OMG difference but it is there none the less. I'm not like, CRAP I should of gotten the 4.11's either. I set my cruise @ 70mph this morning and it tach's 2000 and w/ the 3.73's it tach's 2500. At 60mph it tach's 2000 now. I did go from a slow roll, 5mph, and WOT and I like the response, goes thru the gears/shifts a lot quicker, but not so much were you feel like you lost 1st (as being too low). I would of like to have played w/ it some more but w/ traffic and the rural roads covered in cinders, I just brought her home and tucked it away for the time being.

Sounds good to me. I'm still split between 3.73 or higher, only cause I have to DD my Mustang and I can imagine @ 60 would probably be 2600 with the 4.10's

 

[LegendLives]

Sounds good to me. I'm still split between 3.73 or higher, only cause I have to DD my Mustang and I can imagine @ 60 would probably be 2600 with the 4.10's

I dont know if it would be that high, I cant say though mine being an A/T, 60 was 2000 on the nose, maybe some one will chime in to help ya out.

 

[Shades]

I dont know if it would be that high, I cant say though mine being an A/T, 60 was 2000 on the nose, maybe some one will chime in to help ya out.

Yea, mine is A/T as well and there is a calculator to figure it out but not trying to bother with it right now.

 

[LegendLives]

Yea, mine is A/T as well and there is a calculator to figure it out but not trying to bother with it right now.

Ok, cool. A little more info $$$... My complete bill was $557 to include gears, friction add., gear oil, pinion bearing, shop supplies, labor and sales tax.

 

[GRAYPNY]

I had 4.10s installed on Sunday. 70mph @ 2,400 rpm is good for me. I don't need to go any faster on the freeway and the motor isn't working hard at that rpm either.

Assuming you go from 3.55 to 3.73, I will be interested in how much of a difference you feel.[/QUOTE]

Not much!

 

[Jeepngli]

Interesting to hear. Is there any FRPP gears in the middle of 3.73 and 4.10's? Like a 3.90's or something?

Glad you you like it and thanks for sharing.

Edit: just looked. Looks like motive makes some 3.90's.