Welcome to Mustang Evolution.
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09-08-2006, 12:29 PM
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#1
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New rear end?
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Registered User
Join Date: Jul 2003
Posts: 13
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Could anyone suggest what rear end I should put in my 98 automatic.I would like to be able to still drive on the highway without using a whole tank of gas.  thanks |
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09-08-2006, 12:48 PM
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#2
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Re: New rea end?
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Teh TC6!
Join Date: Aug 2005
City: Sheppard AFB
State: Texas
Posts: 3,972
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Unless you plan on a lot of mods, the stock 7.5 should be fine, but if you do, go ahead and get the 8.8. Either one really.
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Click the sig for a complete list of mods and pics.
Bewst!? 
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09-08-2006, 01:02 PM
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#3
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Re: New rea end?
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You want to **** me?
Join Date: Jun 2003
City: Kansas City
State: Missouri
Posts: 12,414
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I think she's asking for gear ratios...
Is it a v8 or v6? I say either 4.10s or 3.73w
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-Mike
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09-08-2006, 01:22 PM
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#4
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Re: New rea end?
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Deranged
Join Date: Jan 2005
City: Largo
State: Florida
Posts: 6,307
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3:73 for 5 speed 4:10 for auto
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Mods-MAc CAI , True Dual Flowmaster 40,3.73 ,T-Lok, 25% UDP, 3/8 Phenolic Intake Spacer ,Steeda Tri-ax, SCT Chip/ Tune
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09-08-2006, 01:47 PM
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#5
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Re: New rea end?
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WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 27,240
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3.73's will raise your rpms a modest amount, If I recall right I went up 400rpms~ from my 2.73 gears to 3.73 gears. If your car is a v6 then you have 2.73 for sure. If you have an auto 3.73 or 4.10s are good. Expect 2-3 mpg loss on the highway and to pick up about 1mpg in the city (depending on driving habbits)
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2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
MGW Shifter, Stingers, JLT, SS Inserts, MM FLSFC & CC Plates, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
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09-08-2006, 07:02 PM
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#6
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Re: New rea end?
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Registered User
Join Date: Jul 2003
Posts: 13
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Sorry for not being more specific. I'm going with an 8.8 I already have alot of mods on it. I'm just not sure if I should go with 3:55,3:73 or 4:10.  |
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09-08-2006, 07:25 PM
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#7
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Re: New rea end?
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Senior Member
Join Date: Jul 2006
State: South Carolina
Posts: 3,747
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4.10's, or how about 4.30's.  |
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09-08-2006, 07:31 PM
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#8
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Re: New rea end?
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Cammed Baby!
Join Date: May 2003
City: Chicago 'Burbs
State: Illinois
Posts: 1,713
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What mods? That may make a difference
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2003 SVT Lightning #1059 of 4270
2000 Vert 4R70W
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09-08-2006, 07:32 PM
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#9
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Re: New rea end?
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Registered User
Join Date: Jul 2003
Posts: 13
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WOW I was kinda wanting to avoid that. I was told that I should go with either 3:73 or 4:10.Does any1 have any idea why people suggest such large gears for automatics? |
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09-08-2006, 07:42 PM
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#10
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Re: New rear end?
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Senior Member
Join Date: Jul 2006
State: South Carolina
Posts: 3,747
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You gear automatics lower than you do manuals because automatic transmissions are geared higher in Mustangs I believe. |
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09-08-2006, 07:49 PM
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#11
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Re: New rear end?
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Registered User
Join Date: Jul 2003
Posts: 13
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So far I have CAI,dual exhuast with Flowmasters, UDP, 56mm throttle body,p&p upper intake, 1.8 roller rockers,190 fuel pump and Superchip. But I'm going to get the SCT from vmptuning and 19 lbs injectors. |
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09-08-2006, 08:36 PM
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#12
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Re: New rear end?
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Bob is Good.
Join Date: Jun 2004
City: Greenville
State: Texas
Posts: 5,208
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What kind of driving do you do? Mostly in the city or out on the highway?
If it's mostly highway driving, I'd get the 3.73s. If it's mostly stop and go, I'd get the 4.10s. The 4.10s may actually get better gas mileage than the 3.73s if you are constantly having to drive at 40 mph... |
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09-08-2006, 08:52 PM
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#13
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Re: New rear end?
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I Like Jiblits
Join Date: Jul 2006
City: Hampton
State: Virginia
Posts: 1,520
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I have a 97 automatic with 4.10's and a t-loc and I would not trade them for 3.73's. Def go with the 4.10's  |
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09-08-2006, 08:56 PM
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#14
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Re: New rear end?
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Registered User
Join Date: Jul 2003
Posts: 13
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I'd have to say it's 50% street 50% highway. =( Thanks for all the help |
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09-09-2006, 03:02 AM
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#15
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Re: New rear end?
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You want to **** me?
Join Date: Jun 2003
City: Kansas City
State: Missouri
Posts: 12,414
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so do you have a v8 or v6? either way... get 4.10s with an auto. 
Even on the highway, I got like 23mpg with my sixer on the highway with 4.10s
__________________
-Mike
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09-09-2006, 05:53 AM
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#16
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Re: New rear end?
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Registered User
Join Date: Jul 2003
Posts: 13
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Its a V6. And getting 4:10's isn't harmfull to the car. |
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09-09-2006, 10:08 AM
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#17
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Re: New rear end?
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I Like Jiblits
Join Date: Jul 2006
City: Hampton
State: Virginia
Posts: 1,520
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I would assume it is a v6 because it has a 56mm throttle body (sorry didn't see your last post) |
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09-09-2006, 10:16 AM
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#18
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Re: New rear end?
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Registered User
Join Date: Jul 2003
Posts: 13
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__________________
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09-09-2006, 10:55 AM
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#19
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Re: New rear end?
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You want to **** me?
Join Date: Jun 2003
City: Kansas City
State: Missouri
Posts: 12,414
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nah its not harmful to the car
__________________
-Mike
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