Going from 2.73's to 4.10's

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03-30-2013, 10:37 AM

#11

jboggs_23

Thread Starter

Join Date: Mar 2013

Location: West Virginia

Posts: 13

Quote:

Originally Posted by 89fiveeight

He'll be fine. My 3.73's pull a hair over 2k on the highway

From what I've been told 4.10s won't rev much higher than 2600

03-30-2013, 08:21 PM

#12

mjr46

D.R. THE PATHETIC DORK

Join Date: Jun 2007

Location: West Virginia

Posts: 30,863

Quote:

Originally Posted by deathsled

Maybe hogwash.

I only base my opinion on my 66 which has a 3.50 rear and Ford toploader. In fourth gear, she revs at 4,000 going 70 mph. If I had a fifth gear, don't know how much it would drop off on the rev count.

Since you actually install gears, I will defer to your opinion.

ahh, now I understand your point of view, I too owned a 66, the one in my sig, I ran 3.50's as well with a t-10, and I agree It screamed, because 4th was a 1 to 1 ratio, I eventually converted it to a t-5 from a late model mustang, and solved the whole issue, you should look into a 5 spd conversion, it cured many issues, no more shifter slop/ linkage slop and 5th was great on the highway!!

03-31-2013, 07:57 AM

#13

07stangED

1st Gear Member

Join Date: Feb 2011

Location: CT

Posts: 68

I run 4.10s in my 07 and absolutely love them...No issues on the highway. However...when i had my 4sp 67 Chevelle with 4.11s it certainly did tach out on the highway...I spent all my time in the slow lane.

Last edited by 07stangED; 03-31-2013 at 08:00 AM.

04-03-2013, 02:17 PM

#14

86 newbie

2nd Gear Member

Join Date: Aug 2010

Location: ohio

Posts: 248

i dont mean to hi-jack the tread but i saw what u guys said on ur rpm's with 4.10's. i was told with my 86 5.0 with a t-5 that i have 3.73's but on the highway in 5th going 70 mph i am turning 2500. so do i possibly have 4.10's then???

04-03-2013, 02:47 PM

#15

Derf00

Gentleman's Relish

Join Date: Feb 2005

Location: AZ

Posts: 13,090

Quote:

Originally Posted by mjr46

WTF are you talkin' about?? I run 4.10's and barely turn 2400 at 65 mph, I've installed many 4 .10 set ups in mustangs for guys and never in 5th gear is it reving like crazy.......internet hogwash.

2400 RPM at 65 on a car with a factory redline of 5800 is not necessarily reving but at 80 you're at what...3000? Bleh.

I've driven Mustang 5 speeds with 4.10 gears, 1st is very short (too short) for a DD IMO.

Anyways, to each their own.