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  #1  
Old 04-28-2010, 06:39 PM
Black_Out Black_Out is offline
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Lovin the 410's

Hey all, just posting up some feedback from my recent gear change. I went with FRPP 410's, a HD 8 carbon fiber clutch trac lok w/ spring upgrade, and royal purple for gear oil.

For anyone considering upgrading the gears, DEFINATELY go 410's! It really isn't as huge a difference as I thought it would be. The car feels great now and is 10 times more responsive from any speed. I think I would have been dissapointed with 373s.

And the craziest part, I used to get 18.5 mpg, now I am getting 18. Overall I'm real happy with them...

other than the fact that my bone head mechanic must have installed them wrong, because I am gradually hearing more and more gear whine
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  #2  
Old 04-28-2010, 06:41 PM
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just have him adjust the lash..... i got the same thing done yesterday (except add the 31 spliners) and it feels good too...

Congrats
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  #3  
Old 04-28-2010, 06:44 PM
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Thanks Hopefully the gears are ok, if not hopefully he will do the right thing and replace them.
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  #4  
Old 04-28-2010, 06:47 PM
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Quote:
Originally Posted by Black_Out View Post
Hey all, just posting up some feedback from my recent gear change. I went with FRPP 410's, a HD 8 carbon fiber clutch trac lok w/ spring upgrade, and royal purple for gear oil.

For anyone considering upgrading the gears, DEFINATELY go 410's! It really isn't as huge a difference as I thought it would be. The car feels great now and is 10 times more responsive from any speed. I think I would have been dissapointed with 373s.

And the craziest part, I used to get 18.5 mpg, now I am getting 18. Overall I'm real happy with them...

other than the fact that my bone head mechanic must have installed them wrong, because I am gradually hearing more and more gear whine
Good to hear you like 'em!

I'm seeing about the same mileage variance in mine over the 3.55's and given the improved responsiveness, it's well worth it.
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Build date: 6/19/03
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Eaton swap by ImpalaSlayer 11-09-10

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Build Date 01/27/04
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  #5  
Old 04-28-2010, 07:19 PM
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glad you like them 410,s i went from 327-373 and i love them 410,s would be nice but i,m on the road to much to warrent the 6 dollars a gallon for 94 octane cheers
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  #6  
Old 04-28-2010, 07:48 PM
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Glad to hear you like the change because i am thinking of changing to 410's myself.
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  #7  
Old 04-28-2010, 08:11 PM
Ktorres1 Ktorres1 is offline
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After the lidio tune Ive been really enjoying the trans improvement on the stock 3.55's and was begining to think I'll leave it like is but after reading this i'll probally be headed for 4.10's after steeda udp and LFP steel coil connectors!
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  #8  
Old 04-29-2010, 03:44 AM
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Quote:
Originally Posted by Ktorres1 View Post
After the lidio tune Ive been really enjoying the trans improvement on the stock 3.55's and was begining to think I'll leave it like is but after reading this i'll probally be headed for 4.10's after steeda udp and LFP steel coil connectors!
Do it

It's alot more subtle than I thought it would be, the way everyone talks about 410's I thought I'd have traction issues, but it's really perfect for this car since it's so heavy.
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  #9  
Old 04-29-2010, 04:16 AM
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Quote:
Originally Posted by Black_Out View Post
Do it

It's alot more subtle than I thought it would be, the way everyone talks about 410's I thought I'd have traction issues, but it's really perfect for this car since it's so heavy.
IIRC, the original Marauder program called for the car to be fitted OEM with 4.10's but the beancounters nixed that, apparently on paper that made the car non-compliant with CAFE standards.
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2003 300B DBP
Build date: 6/19/03
Number 7,792 of 7,838 - 326 of 328
Proud member of the MM "BLUES" Bros.
Purchased: 11/10/05
Eaton swap by ImpalaSlayer 11-09-10

Semper et in Aeternum, Mercurius.

In Memory:
2004 DTR
Build Date 01/27/04
Purchased 04/04/04
Wrecked 10/19/05, R.I.P.


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  #10  
Old 04-29-2010, 04:43 AM
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Quote:
Originally Posted by SC Cheesehead View Post
IIRC, the original Marauder program called for the car to be fitted OEM with 4.10's but the beancounters nixed that, apparently on paper that made the car non-compliant with CAFE standards.
I was wondering why they didn't do 4.10's in the first place...........
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  #11  
Old 04-29-2010, 05:44 AM
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One of the best mods for a MArauder.

Aren't you glad you did it?

My mileage went down cause I'm gettin' on the go pedal more.....
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  #12  
Old 04-29-2010, 05:45 AM
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SC Cheesehead SC Cheesehead is offline
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Quote:
Originally Posted by tbone View Post
I was wondering why they didn't do 4.10's in the first place...........
The story I heard (and it was 3rd or 4th hand) was that when the bean-counters took original sales projections for the Marauder and calculated projected mileage for the cars running 4.10 gears, it lowered the CAFE for Ford by a decimal point or so, thus the decision to go to 3.55's

Hindsight being 20/20, we now know:
  • They didn't sell nearly as many Marauders as original sales forecasts predicted.
  • The mileage difference between 3.55's and 4.10's is negligible.
  • Bean-counters don't know squat.
__________________

2003 300B DBP
Build date: 6/19/03
Number 7,792 of 7,838 - 326 of 328
Proud member of the MM "BLUES" Bros.
Purchased: 11/10/05
Eaton swap by ImpalaSlayer 11-09-10

Semper et in Aeternum, Mercurius.

In Memory:
2004 DTR
Build Date 01/27/04
Purchased 04/04/04
Wrecked 10/19/05, R.I.P.


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