Well what many people do is switch the entire rear to avoid having to pay to get new gears set up / it's a cheaper route, that's what I've done twice now.
What you would want to do is get (I'd say 4.10s, I don't doubt you can hit 150 in a formula with them and you will freaking LOVE them off the line), a good Eaton or Torsen carrier (the two are debated over which is stronger... the eatons are rebuildable whereas if the torsen breaks you need a whole new differential), and get them installed.
Changing gears doesn't give you more HP but strictly affects rate of acceleration. it is one of the most noticable mods you can do to your car.
As for brand, it seems most people go with Motive or Richmond from what I've seen.
__________________ 97 Camaro - 2.077 60', 14.745 @ 92.20 - still down, one year later.
194k miles-160* thermo-V8 shocks/springs (V6 rear springs)-3" Magnaflow !cat (3" dynomax bullet) back-SLP CAI-stock boxed LCAs-poly tranny mount and torque arm bushing-custom HPTuners tuning-4.10s/eaton/TA girdle-3.5" alum DS-spohn LCA brackets-prostar skinnies
Come on guys i know there are a few people in here that changed their diff. Where can i get one of those suckers i really want to start looking for prices so i know how much i need to save. Also what is considered a good price?
__________________ 1998 Trans Am Bone Stock...For Now!
Sold 2004 Dodge Ram 1500 QC Hemi W/ K&N Air Filter, Superchips Tuner.
Sold 1994 Firebird Formula W/ Hooker Headers, Magnaflow Exhaust, Ram Air, Fuel Pressure Regulator.
My car is not a v6... I have an LT1 5.7 liter V8... And right now it is my daily driver to work, but it wont be in a year.
But i just need to know were i can get one of these diffs with 4.10 inside
__________________ 1998 Trans Am Bone Stock...For Now!
Sold 2004 Dodge Ram 1500 QC Hemi W/ K&N Air Filter, Superchips Tuner.
Sold 1994 Firebird Formula W/ Hooker Headers, Magnaflow Exhaust, Ram Air, Fuel Pressure Regulator.
My car is not a v6... I have an LT1 5.7 liter V8... And right now it is my daily driver to work, but it wont be in a year.
But i just need to know were i can get one of these diffs with 4.10 inside
If you go for 4.10, expect a top end of like 90mph. A lot of highway miles will rag out the engine pretty fast.
If you really want all that top end get a 2.73. Thats what i have and with a 350/350 setup it has plenty of pedal left at 120mph. 70mph i can still grab second gear and off the line it still has a fairly decent launch. Im sure sombody with a 3.73-4.10 could launch a little harder, but with a gear like that expect anybody with a 2.73 to blow your doors off on the highway.
EDIT: i havent really pushed mine past 120 because my tires are shit right now, but i used one of those online deals that tells you what your top speed is, and i believe with my current setup it was like 167mph.
4.10's + V6 = Crappy Gas mileage and absolutely no top end
I would say go for 3.73's
But it's hard to say not knowing what you use your car for. (Long trips to work, crusing, racing, etc...)
Also a nice 3200 Torque converter for Auto's makes a great upgrade for almost perfect launches.
Your opinion?
So you've owned a 3.8 with 4.10s?
Gas milage is fine (25 mpg is fine with me), I've pegged out my speedometer with room to spare, and have been daily driving it for about 9 months now... city and highway, highway being cruising between 65 and 85.
And at for a torque converter, ye it is pretty much a must have for an auto, but the size stall that will work best is different car to car. It depends on things like powerband and gearing to correctly matcha stall size to a car. For instance, in the 3.8 performance world, 3200 is a tiny bit small, most people seeing the best gains have 3500-4000
__________________ 97 Camaro - 2.077 60', 14.745 @ 92.20 - still down, one year later.
194k miles-160* thermo-V8 shocks/springs (V6 rear springs)-3" Magnaflow !cat (3" dynomax bullet) back-SLP CAI-stock boxed LCAs-poly tranny mount and torque arm bushing-custom HPTuners tuning-4.10s/eaton/TA girdle-3.5" alum DS-spohn LCA brackets-prostar skinnies
yeah they wont give your engine any more horsepower but they will deliver more "umph" to the pavement. its just like downshifting on a bicycle, you dont go as fast but its a hell of a lot easier to pedal. this applies to rear ends in cars. you would probably be fast as hell with 4:10's off the line but youd be spinning a gazillion rpm in top gear on the highway
Yall have fun with them 4.10 gears. Be sure to stay in the far right lane
EDIT: really i need to think about gearing up mine. 273 is good top end but has crappy bottom end. I want somthing between 308 and 373.
you do not want 3.08s. 3.42s are not much to desire too... I should know, I had both.
Have YOU ever drven a 4.10 car?
And SLP guy, if you know me I was planning on getting a freak converter off a current 12.1 car... however that is taking too long so I'm getting a TCI 3500 instead
__________________ 97 Camaro - 2.077 60', 14.745 @ 92.20 - still down, one year later.
194k miles-160* thermo-V8 shocks/springs (V6 rear springs)-3" Magnaflow !cat (3" dynomax bullet) back-SLP CAI-stock boxed LCAs-poly tranny mount and torque arm bushing-custom HPTuners tuning-4.10s/eaton/TA girdle-3.5" alum DS-spohn LCA brackets-prostar skinnies
I wouldnt go with a 3200 stall if ur not heads and cam, LT1's make their power lower there for a higher stall doesnt really benefit u. Something like 2800 is better for u and coming from experience 3.73 is plenty of gear for an automatic, 4.10's are a little overkill for an A4 V8.
__________________
R.I.P. Andy, A great guy and an even better friend.
2000 Z28 A4:
Patriot 226 cam, Comp 918's, Comp Ti retainers, NX 100 shot, Vig 3600 stall, Richmond 3.73's, 2.5in TD's w/ H-pipe & 1-chamber flowmasters, 160* stat, TSP Lid, K&N filter, MSD wires.
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