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Topic: 3.90's...who's got 'em...how do you like 'em
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stitch
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Member # 1522
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posted
 
 
In the first part of Feb. I am looking at getting gears. I am thinkin either 3.73's or 3.90. Everyone says 3.73' are good and 4.10's may be a little steep for an everyday driver.
This is what I was thinkin meet in the middle with the 3.90's, eaton posi unit and new 31 spline axles.
Any input on the gears or my thought will be appreciated. Thanks in advance. ![[patriot]](graemlins/patriot.gif)
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SOLD AS OF SEPT 19TH 2003
Posts: 1187 | From: Sunny SoCal | Registered: Jul 2002
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Gear Head
JARED
Member # 779
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posted
If 3.90's were out when I got gears thats what I wouldve put in my car. Motive makes them and I belive Chuck has them in his gt and hasnt had any problems that I know since the last timne I talked to him. Maybe he will drop a line.
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Support our troops!
Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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Drew B
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Member # 698
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posted
My boy has them in his car he likes them.
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AKA.GR40coupe
Posts: 1992 | From: Nor-cal | Registered: Jan 2002
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stitch
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Member # 1522
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posted
Here is a question regarding differential's.
I understand what a posi unit is, but what is the difference posi and limited slip. Which is preferred in a daily driver.
Thanks
Posts: 1187 | From: Sunny SoCal | Registered: Jul 2002
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166 Merlo
FELONY
MOTORSPORTS
Member # 1549
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posted
posi ![[burnout]](graemlins/burnout.gif) woowoo
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'89 - Boss Coupe
'70 - Drop Cutthang
'68 - Cougnut
'87 - 0166, Its real
Posts: 3954 | From: Thebay | Registered: Jul 2002
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Gear Head
JARED
Member # 779
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posted
Same thing just a differnt name. Posi Traction is the same thing as Track lock and Limted slip they are just all differnt names if I am correctly remembering.
Gm uses the term Posi Traction and Ford uses the term Track-Lock and/or Limited Slip.
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Support our troops!
Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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2000BlackGT
Loyalty
Member # 283
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posted
quote:
Originally posted by 91sleeper:
If 3.90's were out when I got gears thats what I wouldve put in my car. Motive makes them and I belive Chuck has them in his gt and hasnt had any problems that I know since the last timne I talked to him. Maybe he will drop a line.
I got 4.10s in mine
Posts: 2833 | From: Chico, CA | Registered: Jun 2001
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PeNiNsula302
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Member # 1061
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posted
quote:
Originally posted by unfknblvbl89:
Here is a question regarding differential's.
I understand what a posi unit is, but what is the difference posi and limited slip. Which is preferred in a daily driver.
Thanks
I am almost positive that the two are different. Limited slip means that both wheels will turn, but the other one gradually goes, it doesnt pick up immediately. True posi traction means that both wheels spin at all times. Not sure on this though...
Posts: 3423 | Registered: Mar 2002
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flatacid
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Member # 878
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nope. posi and limited are the same. true posi would be a spool.
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89 mustang gt w/ t5
Posts: 573 | From: nowhere | Registered: Feb 2002
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flatacid
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Member # 878
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posted
oh yea. i have 4.10's. if you drive alot on the freeway, i would go 3.73's. if not, go 4.10's. but whatever you get, if you ever decide to go higher (numerically lower), then your gonna be dissapointed. im gonna be going to 3.55's cause of the new engine (long way away). i know im gonna be sad to see the 4.10's go. ![[Frown]](frown.gif)
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89 mustang gt w/ t5
Posts: 573 | From: nowhere | Registered: Feb 2002
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Chris M.
Ignore me, all I do is argue online!
Member # 1708
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posted
posi and trac loc are both brand names for "limited slip" like jared said posi is only gm and tracloc is only ford. When you hear a ford guy say he's got posi, he's also not very smart.
A locker never slips under load but will allow you to turn corners without the tires barking.
A full spool or mini spool will never let the axels turn seperatly.
I have 3.89s and with 28" inch tall tires and a .67 overdrive i cruise at 90 mph at about 2,700 rpm.
Posts: 2828 | From: West Bay, CA | Registered: Aug 2002
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chosen1
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Member # 1906
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posted
i have 3.89's as well in my fastback, and 373 in the cobra. i like the 3.89's a lot.
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1967 Fastback. Should go 10's -but doesn't
1993 Cobra
2003 Suzuki SVS
1966 Coupe -For Sale
Posts: 2205 | Registered: Sep 2002
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