just got the 3.73s installed
04-30-2005, 01:18 PM
#1
TECH Apprentice
Thread Starter
iTrader: (1)
Join Date: Feb 2004
Location: Pittsburgh, PA
Posts: 333
Likes: 0
Received 0 Likes
on
0 Posts
just got the 3.73s installed just got the car back, and there is absolutely no sound to them. i cant wait til the break in period is over so i can get on it. i definately need a tune now, speedo is way off.
04-30-2005, 02:04 PM
#4
TECH Enthusiast
Join Date: Feb 2005
Posts: 563
Likes: 0
Received 0 Likes
on
0 Posts
Top Speed
Originally Posted by warbird27
just got the car back, and there is absolutely no sound to them. i cant wait til the break in period is over so i can get on it. i definately need a tune now, speedo is way off.
I have an A4 with 273s and I am planning an upgrade. Considering 323, 342 and 373. I am a little worried about top end/gas with the 373s as I do a daily highway commute. How do you find the 373s? Is the engin reving alot when driving at higher speeds? Any comments would be appreicated?
JA
Trending Topics
05-02-2005, 01:46 AM
#8
TECH Enthusiast
iTrader: (9)
Join Date: Feb 2003
Location: Edmond, OK
Posts: 562
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by GT Griller
Break in period? Pfffff thats for pansies, i raced my car at the first stop light after i left the shop. Ive driven my gears hard since day one.
05-02-2005, 06:40 AM
#9
Teching In
iTrader: (1)
Join Date: Aug 2004
Location: New Haven, MO
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
I did the same thing, put the gears in, go out it in the street and see how they work....my car is strictly for drag racing and sees little street time. When I do drive it on the street I don't notice any whine.....but then again I can't hear them over my motor.... 
05-02-2005, 01:07 PM
#10
12 Second Club
iTrader: (8)
Join Date: Oct 2004
Location: Hereford,Lubbock
Posts: 1,689
Likes: 0
Received 0 Likes
on
0 Posts
Not any more than any normal set of richmonds. I get a little whur sound at about 60mph or so but ive been told its harmonics. No actual whine just the whur, but u can bearly hear it u have to turn the radio down and listen for it.
05-02-2005, 02:10 PM
#11
TECH Apprentice
Thread Starter
iTrader: (1)
Join Date: Feb 2004
Location: Pittsburgh, PA
Posts: 333
Likes: 0
Received 0 Likes
on
0 Posts
gas consumption def increased. i got em installed for 175 bc i knew some ppl, there gm gears. ive got about 100 miles on em. i had 3.23 in before, and id def recommend gettin 3.73s.
05-02-2005, 03:42 PM
#12
TECH Resident
I do alot of freeway driving, and lost only 3MPG going from 3.23 to 3.73.
The proper way to break in rearend gears is to vary speeds between 45 & 60 MPH for the first 100 miles, not driving the vehicle more than 25 min at a time. Have at least a 30 min cool down period.
For the next 400 miles vary speeds not exceeding 70 MPH, with a 30 min cool down period.
At 500 miles drain and refill differential, and your good for 50K.
During the initial break in period, the ring and pinion gears are meshing together, and will run hotter, and shed small pieces of metal (more like silt). If you do not break in the gears properly you have the chance of searing the gears, or warping them due to excessive heat.
JMHO
SteveC
The proper way to break in rearend gears is to vary speeds between 45 & 60 MPH for the first 100 miles, not driving the vehicle more than 25 min at a time. Have at least a 30 min cool down period.
For the next 400 miles vary speeds not exceeding 70 MPH, with a 30 min cool down period.
At 500 miles drain and refill differential, and your good for 50K.
During the initial break in period, the ring and pinion gears are meshing together, and will run hotter, and shed small pieces of metal (more like silt). If you do not break in the gears properly you have the chance of searing the gears, or warping them due to excessive heat.
JMHO
SteveC