Dave Collins Posted September 4, 2010 Report Share Posted September 4, 2010 I've got a 08 red stripe vert. I had a few things done & it's got 561 rwhp. The suspention is frpp . I still have stock tires & gears,but at any speed in 1st there is no traction at all when I boot it. Tires will be changed in the near future. Question I have will 3.73 gears improve hook up or not? Thanks Link to comment Share on other sites More sharing options...
2010KonaBlueGT Posted September 4, 2010 Report Share Posted September 4, 2010 I've got a 08 red stripe vert. I had a few things done & it's got 561 rwhp. The suspention is frpp . I still have stock tires & gears,but at any speed in 1st there is no traction at all when I boot it. Tires will be changed in the near future. Question I have will 3.73 gears improve hook up or not? If anything, the lower gear will make it easier to spin the tires. Wanna try something? Drop your air pressure in your rear tires and see if that helps. The F1's are VERY particular about over pressure. 5psi can make a night/day difference with them. Phill Link to comment Share on other sites More sharing options...
Dave Collins Posted September 4, 2010 Author Report Share Posted September 4, 2010 If anything, the lower gear will make it easier to spin the tires. Wanna try something? Drop your air pressure in your rear tires and see if that helps. The F1's are VERY particular about over pressure. 5psi can make a night/day difference with them. Phill I'll try that THANKs Link to comment Share on other sites More sharing options...
Whammer Posted September 5, 2010 Report Share Posted September 5, 2010 I'll try that THANKs 3.73's will let you launch harder but if you've got no traction it's not going to matter much. The stock tires on the 08's just don't have enough grip. All reviews on the 10's say the new tire greatly improved traction and the tires on the 11's are even better. Tires are KEY to performance. Link to comment Share on other sites More sharing options...
08 Mustang Posted September 5, 2010 Report Share Posted September 5, 2010 3.73's are something I definitely hear alot of good things about, and something I plan to do to mine, but you'll need some better traction in order to hook up on hard launches Link to comment Share on other sites More sharing options...
chuckstang Posted September 5, 2010 Report Share Posted September 5, 2010 great gears, not so great gear whine Link to comment Share on other sites More sharing options...
Haullin Posted September 6, 2010 Report Share Posted September 6, 2010 I've had my 3.73's (FRPP) for about a week now and they are my second favorite mod after the HE.. There is a almost imperceptible whine on decel... Tell you what though that blower comes on a heck of a lot sooner !! Link to comment Share on other sites More sharing options...
me32 Posted September 6, 2010 Report Share Posted September 6, 2010 go 410's Link to comment Share on other sites More sharing options...
shel-b001 Posted September 6, 2010 Report Share Posted September 6, 2010 3:73`s More streetable Link to comment Share on other sites More sharing options...
Dave Collins Posted September 6, 2010 Author Report Share Posted September 6, 2010 3:73`s More streetable What tires are you guy's finding best under 3.73 Link to comment Share on other sites More sharing options...
ShelbyCobra826 Posted September 6, 2010 Report Share Posted September 6, 2010 3.73's will let you launch harder but if you've got no traction it's not going to matter much. The stock tires on the 08's just don't have enough grip. All reviews on the 10's say the new tire greatly improved traction and the tires on the 11's are even better. Tires are KEY to performance. Agreed on the tires issue. My 18" OEM F1s pale in comparison to the 2011 new take-offs I just put on my car. The new F1s have a different look and different tread pattern. Not certain what Goodyear did; I would have never bought another set of the 18s, but the 19s are great. If you stay with the OEM wheels, I've heard decent things about Nitto 555s. Good luck Link to comment Share on other sites More sharing options...
Haullin Posted September 7, 2010 Report Share Posted September 7, 2010 305 Nitto DR's on 20 by 10's.. night and day from the stockers Link to comment Share on other sites More sharing options...
mustang loco Posted September 7, 2010 Report Share Posted September 7, 2010 Put the 3:73's in last spring,no whine at all and love them!! Link to comment Share on other sites More sharing options...
b17drvr Posted September 8, 2010 Report Share Posted September 8, 2010 Don't Fear the Gear! Link to comment Share on other sites More sharing options...
Dave Collins Posted September 8, 2010 Author Report Share Posted September 8, 2010 Put the 3:73's in last spring,no whine at all and love them!! Why is it that some you with 3.73 gears have a whine on deceleration & others don't. Are they installed wrong? Thanks Dave Link to comment Share on other sites More sharing options...
CrzyHorse Posted September 8, 2010 Report Share Posted September 8, 2010 Why are 4.10's not streetable...I would understand on a 5 speed somewhat but on a 6-speed it should be fine. I would like some info about this... Link to comment Share on other sites More sharing options...
ghodge Posted September 8, 2010 Report Share Posted September 8, 2010 Why are 4.10's not streetable...I would understand on a 5 speed somewhat but on a 6-speed it should be fine. I would like some info about this... 3:73's are more street friendly, 4:10's kick the boost in too early for daily driving (one opinion). I have had my 3:73's for over a year and I love them-absolutely no whine. Link to comment Share on other sites More sharing options...
Secondo Posted September 8, 2010 Report Share Posted September 8, 2010 Kenne Bell tested the 3.73 gears- they'll cost you over 30 HP vs. the stock 3.31s. There was a story about it this year in either Muscle Mustangs or 5.0 magazine. Link to comment Share on other sites More sharing options...
CrzyHorse Posted September 8, 2010 Report Share Posted September 8, 2010 Kenne Bell tested the 3.73 gears- they'll cost you over 30 HP vs. the stock 3.31s. There was a story about it this year in either Muscle Mustangs or 5.0 magazine. What do you mean by cost you? Meaning take away? Link to comment Share on other sites More sharing options...
Secondo Posted September 9, 2010 Report Share Posted September 9, 2010 Yes- see your yourself. This is from 5.0 Mustang magazine online. Also, my mistake, its 20+HP and 30+TQ, see graph in the article. Link to comment Share on other sites More sharing options...
gtt500 Posted September 9, 2010 Report Share Posted September 9, 2010 I run 4:10's but with 315/40/19" tires.They are 28.9" tall.Love the driveability and don't miss the 20hp. Link to comment Share on other sites More sharing options...
SteelTownStang Posted September 10, 2010 Report Share Posted September 10, 2010 3.73s... A mod in my future plans... Link to comment Share on other sites More sharing options...
Secondo Posted September 10, 2010 Report Share Posted September 10, 2010 I run 4:10's but with 315/40/19" tires.They are 28.9" tall.Love the driveability and don't miss the 20hp. Ha Mike I guess you're right when we have as much HP as we have (especially yours), 20HP really isn't much. Link to comment Share on other sites More sharing options...
jsarkis Posted September 10, 2010 Report Share Posted September 10, 2010 Good info. Secondo. I knew they took away from your top speed, but didn't know the higher gear actually took away from your HP. Link to comment Share on other sites More sharing options...
mustang loco Posted September 12, 2010 Report Share Posted September 12, 2010 Why is it that some you with 3.73 gears have a whine on deceleration & others don't. Are they installed wrong? Thanks Dave Sorry Dave to answer you a bit late,my guest would be a yes.(eventhough I really don't have a clue of what exactly is the "backlash" upon installation,but have read about this issue) if this is not followed,that's where the whine would be heard!! Pat. Link to comment Share on other sites More sharing options...
me32 Posted September 13, 2010 Report Share Posted September 13, 2010 I run 4:10's but with 315/40/19" tires.They are 28.9" tall.Love the driveability and don't miss the 20hp. thats more like it. i say run the 410's if i would do it all over again i would of went 410's FRPP. my buddy did 410's in his 08 GT500 an they much better and the MPG is the same as my car with 373's Link to comment Share on other sites More sharing options...
rlhay2 Posted September 15, 2010 Report Share Posted September 15, 2010 Good info. Secondo. I knew they took away from your top speed, but didn't know the higher gear actually took away from your HP. 3.73/4.10 will generate a lower hp reading on a dyno. But 0-60, 1/8 mile, 1/4 mile and trap speeds will be faster. Link to comment Share on other sites More sharing options...
Seahorse Posted September 15, 2010 Report Share Posted September 15, 2010 I'm getting ready to have 3.73's installed too; have done a search and read a lot of older posts re 3.73 installs, notably on issues with gear whine, but haven't seen any recent update posts. So a couple quick Q's; any other input much appreciated as well! - Backlash: .008 still works best? - Gear oil: stick with the Ford stuff, or is there better out there - Redline? Royal Purple? etc...still need friction modifier with those? Recommended gear oil weight? I'm using FRPP 3.73's (M-4209-F373N) and have the GT500 specific install kit with the new high torque pinion bearing (M-4210-B1). The installer is very experienced and I've had great success with his work on previous cars. Link to comment Share on other sites More sharing options...
54First Posted September 16, 2010 Report Share Posted September 16, 2010 Why is it that some you with 3.73 gears have a whine on deceleration & others don't. Are they installed wrong? A whine on deceleration is due to improper preload on the pinion bearing or a bad pinion bearing . Link to comment Share on other sites More sharing options...
Dave Collins Posted September 16, 2010 Author Report Share Posted September 16, 2010 A whine on deceleration is due to improper preload on the pinion bearing or a bad pinion bearing . Thanks I'm going to have 3.73 gears installed and I hope it's done right. Link to comment Share on other sites More sharing options...
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