4.10 Or 3.73

Discussion in '1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-' started by eskion, Aug 12, 2013.


  1. eskion

    eskion New Member

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    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?
  2. 84Ttop

    84Ttop They make new pistons every day, so why worry? SN Certified Technician

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    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
  3. A5literMan

    A5literMan Advanced Member

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    Couldn't agree more! Stay 3.73s!! Make more power! And get it to the ground!!:nice:
  4. stangboy

    stangboy Founding Member

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    Yeah, what they said.
  5. reldla1996

    reldla1996 Member

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    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.
  6. mikestang63

    mikestang63 Mustang Master

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    Not worth the money,time, or effort IMO. Better $$ spent elsewhere.
  7. eskion

    eskion New Member

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    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
  8. srtthis

    srtthis the guy doing it does every local racers rear end

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    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
  9. mikestang63

    mikestang63 Mustang Master

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    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.
  10. srtthis

    srtthis the guy doing it does every local racers rear end

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    you mean a winters? based off the jag rears?
  11. mikestang63

    mikestang63 Mustang Master

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    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.
  12. srtthis

    srtthis the guy doing it does every local racers rear end

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    yup! they are still out there... they actually use those gears for procharger gear drive set ups. very popular with dirt track cars also

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