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» Northern California Ford Owners     » Automotive   » Tech Talk   » 3.90 Gears???

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Author Topic: 3.90 Gears???
90 Stang5.0
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Whats everybodys opinion on the the new 3.90 gears.

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"Keep Your Friends Close But Keep Your Enemies Closer"

Posts: 130 | From: NOR CAL | Registered: Apr 2003  |  :
Gear Head
JARED
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I would have got them if they were out when I put my 3.73's in.

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Posts: 5685 | From: EASTBAY | Registered: Jan 2002  |  :
Tri-Bar
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Only abot 350 RPM higher than the 3.71 and lower than the 4.10's

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Posts: 78 | From: Modesto | Registered: Dec 2002  |  :
mustanggt5091
All I need is.....
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Im going to get them when a rearend rebuild becomes necessary [Big Grin]

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06 Limited Edition R6 !!!!!

Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001  |  :
Yellow94GT
Mr. 60 FT
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quote:
Originally posted by 90 Stang5.0:
Whats everybodys opinion on the the new 3.90 gears.

Wish I had them

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AED

1994 GT Bucket that will likely never run
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Posts: 5990 | From: Cameron Park, Ca | Registered: Sep 2001  |  :
88DroptopGT
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Even though I still have stock 3.08s, NEVER FEAR THE GEAR! 3.90s are pretty close to 4.10s IMO, I doubt you will feel much difference, except at the pump. Just my $.02 though.
Posts: 3978 | From: 707 | Registered: Mar 2003  |  :
Stimson
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I think AaronC on here has them. If they existed back when I got my 3.73's, I would have gone for 3.90's instead.
Posts: 2373 | Registered: Jun 2000  |  :
Impact 5.0
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OK here is a question, I am running 3.55's right now and the car seems to get up there fast threw gears, shifting at 5500 rpms, how much of a Dif are you going to feel going to a 373 or a 3.90 as far as shifting speed....if that makes sence
Posts: 2173 | From: Tracy, CA | Registered: May 2003  |  :
67aquafastback
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You will shift at lower speeds with the 3.90s over the 3,55s

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Posts: 56 | From: Fiji | Registered: Jul 2003  |  :
Stimson
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If you have 3.55's, 3.73's and 3.90's really won't be worth the $400 to upgrade.
Posts: 2373 | Registered: Jun 2000  |  :
166 Merlo
FELONY
MOTORSPORTS
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quote:
Originally posted by st5150:
If you have 3.55's, 3.73's and 3.90's really won't be worth the $400 to upgrade.

4.10's will [burnout]

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'70 - Drop Cutthang
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Posts: 3954 | From: Thebay | Registered: Jul 2002  |  :
Tri-Bar
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I run 4.10's with a T-5z trans I can still use first gear.I do have to shift much sooner than I did before. But I run through the gears faster to 5th. Now 5th pulls like a any other gear would. Go foe broke and get the 4.10's

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Posts: 78 | From: Modesto | Registered: Dec 2002  |  :
KCmustangboy
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quote:
Originally posted by Tri-Bar:
I run 4.10's with a T-5z trans I can still use first gear.I do have to shift much sooner than I did before. But I run through the gears faster to 5th. Now 5th pulls like a any other gear would. Go foe broke and get the 4.10's

I got 3.73s and I feeling the same way unless I am on a roadtrip where traffic is doing 90mph, other then that I wish I had the 3.90s or 4.10s

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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!

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Posts: 1691 | From: San Jose, CA | Registered: Oct 2002  |  :
sn8k2
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--------70MPH--80MPH
3.27----2037----2328 [Razz]
3.55----2211----2527 [Razz]
3.73----2323----2655 [Razz]
3.90----2429----2776 [Big Grin]
4.10----2554----2919 [Big Grin]
4.30----2679----3061 [worship]

RPMs shown above are appoximate - but pretty close for the Mustangs out there. YMMV [dance]

[ July 24, 2003, 10:57 PM: Message edited by: sn8k ]

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Mark K

2003 Cobra | 2001 Cobra | 1989 Black Mustang GT - the Savage

Posts: 152 | From: Livermore, CA | Registered: Jan 2003  |  :


 
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