• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

4.10 Or 3.73

  • Thread starter Thread starter eskion
  • Start date Start date Aug 12, 2013

eskion

New Member
Mar 19, 2007
27
1
4
Northwest Indiana
Aug 12, 2013
#1
  • Aug 12, 2013
  • #1
Currently I have a 3.73 posi in my 88 5.0 LX, but I'm considering swapping it to a 4.10. I don't race it yet, except the little eclipse that wants to get eaten up occasionally.

Just wondering if anyone out there drives city and highway with a 4.10, and what has your experience been with it?
 

84Ttop

They make new pistons every day, so why worry?
5 Year Member
Jul 2, 2009
5,222
3,254
204
South Jersey
Aug 12, 2013
#2
  • Aug 12, 2013
  • #2
Leave the 3.73 gears in there, IMHO. They are a great all around gear, not bad on the high way and work well on the track with either a 26 or 28" tire. As your power level increases (natural mustang mod progression) and if you are racing more you can run into a problem with "running out of gear" on the top of the track with the 4.10. Just too many rpm's for a stock block
 

A5literMan

At least it is lumpy...
5 Year Member
Jul 30, 2011
4,674
2,343
194
Illinois
Aug 12, 2013
#3
  • Aug 12, 2013
  • #3
Couldn't agree more! Stay 3.73s!! Make more power! And get it to the ground!!
 

stangboy

Founding Member
Aug 31, 1999
3,932
469
194
New Orleans, LA
Aug 12, 2013
#4
  • Aug 12, 2013
  • #4
Yeah, what they said.
 
R

reldla1996

Member
May 4, 2011
356
22
19
Dayton, Ohio
Aug 12, 2013
#5
  • Aug 12, 2013
  • #5
410 versus a 373 is 10 percent higher RPM, so if you're currently running 2000 rpm on the highway, a 410 would raise it to 2200, and you'd lose a couple mpg. If you're already lighting the tires up with a 373, there's not much point in going to a 410.
 

mikestang63

SN Certified Technician
Aug 27, 2012
11,606
8,859
214
In the garage
Aug 12, 2013
#6
  • Aug 12, 2013
  • #6
Not worth the money,time, or effort IMO. Better $$ spent elsewhere.
 

eskion

New Member
Mar 19, 2007
27
1
4
Northwest Indiana
Aug 22, 2013
#7
  • Aug 22, 2013
  • #7
Thanks for the responses, I'll stay 3.73. Considering putting it up for trade for SN95 gt 5 speed, but I have no idea what the value of mine is

Sent from my PG86100 using Tapatalk 2
 

srtthis

the guy doing it does every local racers rear end
15 Year Member
Jul 3, 2009
5,129
1,666
204
Maryland
Aug 22, 2013
#8
  • Aug 22, 2013
  • #8
i just ditched my 3.73's for 4.10's i cant tell a bit of difference honestly. once i get it to the track i better see some change lol
 

mikestang63

SN Certified Technician
Aug 27, 2012
11,606
8,859
214
In the garage
Aug 22, 2013
#9
  • Aug 22, 2013
  • #9
srtthis said:
i just ditched my 3.73's for 4.10's i cant tell a bit of difference honestly. once i get it to the track i better see some change lol
Click to expand...

Time for a franklin quick change..lol. Do they still make those? They were all the rage back in the day. We used to love them. Just take off the rear cover and swap from 3.00 to 4.11 in ten minutes.
 

srtthis

the guy doing it does every local racers rear end
15 Year Member
Jul 3, 2009
5,129
1,666
204
Maryland
Aug 22, 2013
#10
  • Aug 22, 2013
  • #10
you mean a winters? based off the jag rears?
 

mikestang63

SN Certified Technician
Aug 27, 2012
11,606
8,859
214
In the garage
Aug 22, 2013
#11
  • Aug 22, 2013
  • #11
Yep..... been 20+ years since I've seen one. I remember they had straight cut gears and whined like the old cloyes timing gears set.
 

srtthis

the guy doing it does every local racers rear end
15 Year Member
Jul 3, 2009
5,129
1,666
204
Maryland
Aug 22, 2013
#12
  • Aug 22, 2013
  • #12
yup! they are still out there... they actually use those gears for procharger gear drive set ups. very popular with dirt track cars also
 
You must log in or register to reply here.

Similar threads

A
Discussion on mild budget build/ top end
  • Acesario
  • Feb 21, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
20
Views
703
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Feb 23, 2026
General karthief
Progress Thread 93 LX father son project
  • ZAM93LX
  • Oct 26, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
24
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Dec 3, 2025
Scrapla347
S
Block questions
  • s_vargas54
  • Jan 25, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
21
Views
716
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Feb 8, 2026
Trogdor
K
3.8 T5 & Bellhousing to 1987 Lincoln 5.0
  • ks65stang
  • Mar 2, 2026
  • Other Auto Tech
Replies
3
Views
291
Other Auto Tech Mar 3, 2026
Noobz347
New Member with a 1992
  • Clutchfork
  • Oct 18, 2025
  • The Welcome Wagon
Replies
5
Views
289
The Welcome Wagon Oct 19, 2025
Clutchfork
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?