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3.73's or 4.10's?

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  • #1

    3.73's or 4.10's?

    Ok, eventually... not now by any means... I'm looking to beef up the gears in my ride. Just would like some opinions on which way to go.....

    Mind you, I am still new, and don't know jack about gears...so lengthy explanations are welcome
    1997 Trans Am WS6 Black M6
    370 RWHP / 352 TQ
    CC306 & Comp behives, LT1 Extreme Duty timing set, 1.6 RR's, CSR Elec Water Pump, Pacesetter LT's & ORY, GMMG w/ Ovals, K&N, Air Foil, TB Bypass, !AIR, !EGR, !CAGS, 160 deg thermo, LT4 KM, PCM tuning by Total-ReCal, March Pullies, Pro 5.0, 4.11 gears, LS1 alum DS, BMR strut tower brace, UMI SFC's, LCA's w/relo brackets & panhard
    Tags: None
  • #2
    You have an M6 I see. Get the 4.10's, that's the best gear for your trans.

    After the install, you will have to have your speedo. recalibrated.
    97 Chevy 'Raro Z28 M6- Ported & Polished LT1 heads,beehives,1.6/1.94 valves, 226/231 custom cam,K&N FIPK, 94-95 BBK shorty's,ORY,Magnaflow Catback,no cats,BMR LCA Relocation Brackets,Lower Control Arms,Adjustable Panhard Bar,Eibach Pro Kit,SPEC Stage 1,Walbro 255 Fuel Pump,30LB Injectors,Pro 5.0,Short stick,MSD 8.5's,NGK TR55's,LT4KM

    01 Honda CBR600 F4i-Two bro's,Corbins,SS brake lines

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    • #3
      4.10's......you will have a totally different car.....much quicker off the mark.....the best mod I did.....
      DWS
      Silver M6 '95 Formula-sold to MCKNBRD

      Zaino all the way!!

      '03 Z06....Donaldson Blackwing, CAGS, '04 Z06 shocks, ceramic pads

      Comment

      • #4
        Originally posted by DWS'95Bird
        4.10's......you will have a totally different car.....much quicker off the mark.....the best mod I did.....
        How much do you think I am looking at ($$$) ... from the gears to the install ?

        Also, how is driving "normally" with that kind of ratio?
        1997 Trans Am WS6 Black M6
        370 RWHP / 352 TQ
        CC306 & Comp behives, LT1 Extreme Duty timing set, 1.6 RR's, CSR Elec Water Pump, Pacesetter LT's & ORY, GMMG w/ Ovals, K&N, Air Foil, TB Bypass, !AIR, !EGR, !CAGS, 160 deg thermo, LT4 KM, PCM tuning by Total-ReCal, March Pullies, Pro 5.0, 4.11 gears, LS1 alum DS, BMR strut tower brace, UMI SFC's, LCA's w/relo brackets & panhard

        Comment

        • #5
          You are looking at like 250 for the gears and install kit, and a few hundred for installation. My shop quoted me like 700 for parts and labor I think? Or maybe it was 500. I'm not quite sure, but either way I decided I wasn't going to pay it.

          I got a dial indicater and the other specialty tool you need and learned how to use it. Now I just need to buy the gear.

          My friend with 4.10's says they're awesome, and speed snaps a lot quicker, it just seems like he is constantly shifting. Makes 6th gear worth something too
          97 Chevy 'Raro Z28 M6- Ported & Polished LT1 heads,beehives,1.6/1.94 valves, 226/231 custom cam,K&N FIPK, 94-95 BBK shorty's,ORY,Magnaflow Catback,no cats,BMR LCA Relocation Brackets,Lower Control Arms,Adjustable Panhard Bar,Eibach Pro Kit,SPEC Stage 1,Walbro 255 Fuel Pump,30LB Injectors,Pro 5.0,Short stick,MSD 8.5's,NGK TR55's,LT4KM

          01 Honda CBR600 F4i-Two bro's,Corbins,SS brake lines

          Comment

          • #6
            Got my 4.10's, now im just for a day thats not in the mid 90's.
            No time to be under a car.
            1995 Z28 Convertible, 350ci LT1 73K miles M6.
            Dyno results: 301.5 RWHP 326.7 RWTQ
            Performance Mods 4.10 gears, AS&M CAI, MADZ28 tune, Borla catback, RK Sport mid-length headers, LT4 valve springs, CC pro mag 1.6 RR's, LT4 KM, MSD OVC wires, TB bypass, 160 t-stat, SLP clutch plate w/Kevlar dual friction disk, 52MM TB, TB air foil, 1LE aluminum driveshaft, ASP UD pulley, LS1 brakes w/ Hawk HPS pads, LCA's and PHB.

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            • #7
              a quick check of tbyrne shows
              gears: ~$230
              gears install kit: ~115
              rearend girdle/stud kit: ~175

              installation: guessing $150-$200, depending on who you use......ask around for the best gear guy in your area......a sloppy installation you do not want....

              as far as normal driving, you will notice the higher gears are comfortable at lower speeds.....40-45 mph in 5th is not unusual.....6th is more usable, and not just an overdrive

              when you want to play, there is where the smile factor comes in.......and the gas gauge literally changes before your eyes
              DWS
              Silver M6 '95 Formula-sold to MCKNBRD

              Zaino all the way!!

              '03 Z06....Donaldson Blackwing, CAGS, '04 Z06 shocks, ceramic pads

              Comment

              • #8
                I gave $330 for motive performance 4.10 (orange box) including master install with all bearings plus the crush sleeve eliminator spacer and shipping.
                I even had it on the porch the next day.
                http://www.gearsareus.com/
                Very helpful people as well, call em' up.

                You cqn get standard motive (blue box) for about $30.00 less.
                1995 Z28 Convertible, 350ci LT1 73K miles M6.
                Dyno results: 301.5 RWHP 326.7 RWTQ
                Performance Mods 4.10 gears, AS&M CAI, MADZ28 tune, Borla catback, RK Sport mid-length headers, LT4 valve springs, CC pro mag 1.6 RR's, LT4 KM, MSD OVC wires, TB bypass, 160 t-stat, SLP clutch plate w/Kevlar dual friction disk, 52MM TB, TB air foil, 1LE aluminum driveshaft, ASP UD pulley, LS1 brakes w/ Hawk HPS pads, LCA's and PHB.

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                • #9
                  find a rear end shop locally, let them order all your parts. i paid 380 for everything installed. for 373's.
                  1994 firebird formula

                  Comment

                  • #10
                    How much time would be shaven off your 0-60 and quarter mile times with a swap to 4.10's on an M6?
                    Red 95 Trans Am: M6, Moroso CAI, Magnaflow, Spohn sway bars, back to life as of 2/15/10!!!
                    SOLD- Kinda miss it
                    94 Del Sol VTEC: 27 city/ 33 highway, knee deep in slowness
                    SOLD- Good riddance!
                    2006 Ford Fusion: 2.3, 5 speed, could run 15lbs of boost with a 150 shot and it'd still be slow

                    Comment

                    • #11
                      I dont have them in yet, I have heard 2-3 tenths with a noticable SOTP improvement.
                      1995 Z28 Convertible, 350ci LT1 73K miles M6.
                      Dyno results: 301.5 RWHP 326.7 RWTQ
                      Performance Mods 4.10 gears, AS&M CAI, MADZ28 tune, Borla catback, RK Sport mid-length headers, LT4 valve springs, CC pro mag 1.6 RR's, LT4 KM, MSD OVC wires, TB bypass, 160 t-stat, SLP clutch plate w/Kevlar dual friction disk, 52MM TB, TB air foil, 1LE aluminum driveshaft, ASP UD pulley, LS1 brakes w/ Hawk HPS pads, LCA's and PHB.

                      Comment

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