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01-31-2006, 08:52 PM
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#1
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Join Date: Nov 2005
Location: Pitman, NJ
Posts: 178
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gears...
a quick question, apparently richmond doesnt make 3.55 gears for the 7.5 rear, does any company make 3.55's for a 7.5 rear or should i just go for the 3.73's? i have a 350 5-speed mostly going to be used for summertime, a lot of shore trips, so highway will be my concern
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01-31-2006, 08:54 PM
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#2
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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3.73s shouldn't be too bad on the highway. Just  an online calculator and enter in your gear, speed, tire height, and 5th gear ratio. That will give you the RPM that you will cruise at.
- Justin
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01-31-2006, 08:55 PM
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#3
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Join Date: Nov 2005
Location: Pitman, NJ
Posts: 178
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well i figure it to be about 2500 maybe? sound right at all?
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01-31-2006, 08:57 PM
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#4
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
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Quote:
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Originally Posted by 91camaroracer
well i figure it to be about 2500 maybe? sound right at all?
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At what speed? 2500ish at 75ish will prolly be about right. I don't know what ratio 5th gear in a 3rd gen T5 is though....
- Justin
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1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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01-31-2006, 09:04 PM
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#5
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Join Date: Nov 2005
Location: Pitman, NJ
Posts: 178
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probably .63 for 5th gear
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01-31-2006, 09:11 PM
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#6
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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Tim says it's a .67:1
- Justin
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1999 Camry - Beigemobile DD
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2004 Grand Cherokee - Not running / Project / Selling?
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01-31-2006, 09:17 PM
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#7
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Join Date: Nov 2005
Location: Pitman, NJ
Posts: 178
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well being as it is, about 2200 at 65 mph ?
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01-31-2006, 09:22 PM
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#8
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
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Quote:
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Originally Posted by 91camaroracer
well being as it is, about 2200 at 65 mph ?
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With 3.73s:
2100 @ 65 mph
2425 @ 75 mph
With 4.10s:
2300 @ 65 mph
2660 @ 75 mph
I say go with 4.10s 
- Justin
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2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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01-31-2006, 09:25 PM
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#9
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Join Date: Nov 2005
Location: Pitman, NJ
Posts: 178
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thanks for the help, i think i might just go with 3.73's or maybe the 4.10's ... i dont know, only time will tell 
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01-31-2006, 09:30 PM
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#10
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
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4.10s FTW!!!
- Justin
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1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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01-31-2006, 10:03 PM
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#11
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NJFBOA Co-Founder
Join Date: Jul 2004
Location: All up in your kool aid!
Posts: 12,235
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Quote:
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Originally Posted by Tru2Chevy
4.10s FTW!!!
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02-01-2006, 01:55 AM
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#12
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Stalker
Join Date: Aug 2004
Posts: 12,083
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On my 87 monte SS with 3.73s, i was running right around 2700rpms at 80mph and im running a 255/50-17 rear tire.
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02-01-2006, 09:48 AM
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#13
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
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Quote:
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Originally Posted by SmokingSS
On my 87 monte SS with 3.73s, i was running right around 2700rpms at 80mph and im running a 255/50-17 rear tire.
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That's on a 27" tall tire though....
- Justin
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02-01-2006, 10:32 AM
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#14
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
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i would go with 3:73s for the follow:
3:73s were the performance option gear for the T5 trans. They work great with the low ratios of 1st and 2nd and still give you good milage in 5th.
In your other post you were talking about traction problems. 3:73 will add to your problems, but 4:10s would be even more of a problem.
Depending on your exhaust, 4:10 are going to push your RPMs up when cruising. I had headers and a flowmaster and the drone @ 75 MPH was too much for me on long hauls.
my .02
JB
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02-01-2006, 11:54 AM
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#15
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Join Date: Aug 2004
Location: North Jersey
Posts: 3,047
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Quote:
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Originally Posted by Pampered-Z
i would go with 3:73s for the follow:
3:73s were the performance option gear for the T5 trans. They work great with the low ratios of 1st and 2nd and still give you good milage in 5th.
In your other post you were talking about traction problems. 3:73 will add to your problems, but 4:10s would be even more of a problem.
Depending on your exhaust, 4:10 are going to push your RPMs up when cruising. I had headers and a flowmaster and the drone @ 75 MPH was too much for me on long hauls.
my .02
JB
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If you've got a motor that can rev, 4.10s with a T5 will be OK. I know in my Monte (TPI 305/T5/3.73s) it'll wind out 1st gear pretty quick, especially since the motor is done at 5K rpms. Choose wisely.
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02-02-2006, 01:04 AM
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#16
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15 Second Club
Join Date: Jul 2005
Location: Vineland
Posts: 6,621
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Quote:
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Originally Posted by Tru2Chevy
With 3.73s:
2100 @ 65 mph
2425 @ 75 mph
With 4.10s:
2300 @ 65 mph
2660 @ 75 mph
I say go with 4.10s
- Justin |
would this be around the same for my car or completely different? i think i have 235s, a4
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02-02-2006, 09:31 AM
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#17
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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Quote:
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Originally Posted by Brando56894
would this be around the same for my car or completely different? i think i have 235s, a4
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The rev's would be just a touch higher for your car, since the A4 OD is .70:1, compared to his .67:1
It would be less than 100 RPM difference though, your tires should be about the same height, 25.6"-26.1" tall was standard size for every 82-02 F-Body.
- Justin
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02-04-2006, 04:02 PM
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#18
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2007 Member of the Year
Join Date: Oct 2004
Location: Seabrook, TX
Posts: 14,281
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4.10s
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Originally Posted by LTb1ow
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Same result cept this headache doesnt last months.
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02-04-2006, 04:48 PM
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#19
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Banned Camp Director Emeritus
Join Date: Aug 2004
Location: Somerset County
Posts: 8,395
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no love for the 4.56's...I see how it is... 
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Quote:
Originally Posted by baddest434
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02-07-2006, 10:37 PM
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#20
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10 Second Club
Join Date: Aug 2004
Location: Hatfield, PA
Posts: 1,292
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his screen name looks alot like mine!! haha cool 
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02-08-2006, 08:27 PM
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#21
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15 Second Club
Join Date: Jul 2005
Location: Vineland
Posts: 6,621
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ill see first hand what 4.10s can do and what the rpms will be when kasey gets his installed and ill see how i like it
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