Customer Reviews (17) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Weekend

Installation Cost:$500-$1000

• Performance Gain 4.5 4.5
• Fit 5 5

• 5/5

  Installation Time: Shop Install

  Installation Cost: $500-$1000

  April 08, 2013

  Unreal!

  These gears really improved my cobra, not to mention american muscles incredibly fast and superior customer service, ordered some parts from summit racing. I then ordered parts from american muscle the american muscle parts were shipped out half an hour after ordering online and showed up at my door a week before the summit racing parts. Absolutely incredible customer service cannot go wrong with american muscle. As for the gears they really woke my 400rwhp cobra up i would recommend them for any muscle running under 600 rwhp

  Kaptainkevsta

  Year: 2004 Submodel: Cobra Edmonton, AB, Canada

  Helpful (3) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 5

    5

  • Bang for your Buck 5

    5
• 3/5

  Installation Time: Full Day

  June 21, 2012

  4.10 Motive

  The install was very tedious and I recommend a shop do it. The performance is ok but Im still breaking them in, so cant say to much on that. Noise...well thats a dif story. Nice and quiet on accel. But as soon as you let off the gas and it decels, it wines very loud. Kind of embarrasing at times. Ive looked alot into it but most say its the material and/or backlash. So if noise doesnt bother you, get them. If it does..... research what you want prior.

  03Centennial

  Year: 2003 Submodel: GT Jacksonville, NC, USA

  Helpful (3) Thanks for your input!

  • Performance Gain 4

    4

  • Fit 5

    5

  • Bang for your Buck 4

    4
• 5/5

  September 14, 2010

  Motion 4:10 Gears

  These gears are quiet and smooth and make your car feel like someone hid a big block under your hood!

  Jim Wyche

  Helpful (4) Thanks for your input!
• 5/5

  August 22, 2010

  Great Gears

  if you have a mustang with an 8.8 rear axle, you have to have these gears, it is NIGHT AND DAY, just from these gears alone i saw a huge increase in power all across the powerband

  Nashville

  Helpful (5) Thanks for your input!
• 5/5

  August 21, 2010

  awesome

  have the 4.10's with my supercharger and WHOOO DOGGY you wanna talk about BANG for your buck, good lord, this is worth the money folks, what are you waiting for? Time to get serious? These gears will give you something to be proud of

  Nashville

  Helpful (2) Thanks for your input!
• 5/5

  November 04, 2009

  LoOoOve It

  makes your car really fun to drive. i really recommend to get the bearing kit with this part. it would make your life easier in installing them + no ugly noise afterward.

  sharaf Malebary

  Helpful (6) Thanks for your input!
• 5/5

  August 07, 2009

  4.10's

  love the 4.10's, i've used both Ford Racing, and the Motive gears in 3.73 both with the motive gear bearing kit and have no problems at all, no while no clunking, awesome customer service and shipping was very fast, at the best price i could find

  Richard

  Helpful (4) Thanks for your input!
• 4/5

  June 18, 2009

  Noticeable difference

  I just had these installed with a Detroit TrueTrac on my 3.9L V6 and they made a very big difference. They do make some noise but I don\'t think it\'s annoying or unbearable, actually sounds pretty cool when I let off the gas and roll, sounds like it\'s winding down haha. And as always American Muscle was outstanding with how fast they shipped them.

  Chris

  Helpful (4) Thanks for your input!
• 5/5

  March 23, 2009

  whine

  go with ford racings gear(At least thats what my shop told me). These gears whine. It annoys me, if it doesnt annoy you then buy them. The 4.10 and the tune made the car so stupid fast. Just got my first ticket in them!!!! LOL. That\'s why i give the 4.10\'s a five star! Definitly needs to be first mod

  matt r.

  Helpful (4) Thanks for your input!
• 5/5

  February 02, 2009

  Nice stuff

  Great product. Really noticeable with a new LCD. I love em! Get the Predator Diablo tuner to go with, it is awesome.

  brad

  Helpful (4) Thanks for your input!
• 5/5

  August 15, 2008

  Plan First...

  These 4.10 gears from Motive were the third modification I had done to my GT. The difference in acceleration was very noticeable. One thing everyone warned me about was a drop in fuel efficiency, which I did not see. The gears allow the engine to operate at a more efficient speed, which won\'t really affect mileage if you keep your foot out of it. Another common misconception is a drop in \"top speed.\" That is totally false. Your top achievable speed will actually increase now that the engine will be operating at a slightly higher rpm. Sure, the top redline speed is lowered to 156, but unless you can run 8\'s in the 1/4 mile, you have nothing to worry about. These gears did have a little bit of whine, mostly heard when no load was placed on them (coasting). Unless you hear excessive whine (almost like a loud hum heard at all times), you have nothing to worry about. I recommend you give these gears a couple of heat/cool cycles before putting the pedal to the floor. That hardens them up. Lastly, plan things out before you get 4.10s. For an N/A Mustang, they provide a good increase in acceleration at the cost of 500 rpms. If you plan on supercharging your Mustang, I urge you to consider 3.73s. Overall these are a very good set of gears, and ideal for most Mustang owners. I recommend purchasing the differential bearing kit with these gears.

  Chris V

  Helpful (9) Thanks for your input!
• 5/5

  August 04, 2008

  GREAT GEARS!

  THESE GEARS SERIOUSLY WOKE UP MY 04 GT.. PUTS ME IN THE POWERBAND IN NO TIME AND HITS IN EVERY GEAR. I\'VE DRIVEN 3.73\'S AND I MADE NO MISTAKE GOING WITH THE 4.10S SPEEDO\'S A LITTLE OFF BUT NOW ITS TIME FOR A TUNER. DON\'T FEAR THE GEAR

  MATEO

  Year: 2004 Submodel: GT

  Helpful (4) Thanks for your input!
• 5/5

  June 05, 2008

  Awesome!

  I had these installed last night and WOW! Well worth it.

  Scott Headley

  Helpful (3) Thanks for your input!
• 5/5

  May 20, 2008

  Not bad

  Great price on the gears! They work well. Overall, worth it.

  Matt P.

  Helpful (3) Thanks for your input!
• 5/5

  December 24, 2007

  love \'em

  i love them in my 03 gt 5 speed. very streetable and still average 18+ mpg when i try. its just too fun not to keep your foot off the pedal. the torque is great. so far ive been able to pull a 13.8 @ 101 on street tires (2.2 60\' time) and a mail order tune correct the spedo. great mod for you 2v mustang. will def. get these on my next mustang.

  Brandon James (PureStang)

  Year: 2003 Submodel: GT

  Helpful (4) Thanks for your input!
• 5/5

  September 24, 2007

  Wow!

  Hands down one of the best mods you can do on a Non-PI mustang. All I can compair it to is, it feels like the car has a shot of nitrous. Once again AM.com has the best/fastest shipping times around!

  Matthew Brooks(red281gt)

  Helpful (4) Thanks for your input!
• 5/5

  September 24, 2007

  4.10s + Auto = fast!

  I put these gears in my 04 GT auto when i still had it. Everyone told me that 4.10s were to big for a DD auto car. I can tell you they were wrong! these gears among other mods allowed me to go from 14.7s stock to a 13.61@103. also on the highway the RPMs were not bad at all to me. with the 4.10s and auto i still averaged 20MPG and even got a best of 24MPG on a road trip. DO NOT FEAR THE GEAR!!!!!!!!!!!!!!!!!!!!!! 4.10s will be going into my 07 GT as well

  Andy Shaffer

  Year: 2004 Submodel: GT

  Helpful (4) Thanks for your input!