i jus broke my 373 rearend i sheared off 3 teeth on the pinion gear these were richmond would u recommend going with richmond again or someone like us gear and should i stay with 373 or go to different ratio? this is my daily driver that i street race and go to track what works best with tpi?
thanks

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1992 camaro RS
195cc AFR heads with compition port work milled to 58cc "10-1 compression"
373 10 bolt rearend
ssm sfc's
87 350 TPI
bored 30 over
compucam 2032 with 1.65 full roller rockers
497-510 LIFT 214-220 duration
msd6AL
1 3/4 hooker long tube headers
4" mufflex system
k&n filters gutter air box gutted maf"no fins no screens"
3 pc under drive pulleys
no emissions no egr etc
custom ED Wright chip
eddelbroc intake base and runners ported plenum
taylor 8mm wires
B&M mega shifter
gutted maf/airbox
hotchkis lower control arms
3" exhuast cutout
homemade cold air intake
2000 tci stall
700R4 with B&M shift kit edelbrock water pump
new best ET 13.5 @104.66
no times with new afr heads hoping for 12's on motor
Nos installed but no times yet
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I've been where you are a few times with my old Rear end. I finally decided to spend the money and go with a Moser 12 Bolt. It's worth the money and it really doesn't matter what ratio you go with. I have 3.73's

 

I'd for sure stay with the Richmonds. As for what gear ratio to choose, thats up to you. How did the car feel with the 3.73s? Did it blow through the gears too quickly, or was it hard to launch? If so, you might want to go down to a set of 3.42s. If it felt good with the 3.73s, get another set of those. I would recomend not going higher than 3.73 (i.e. 4.11), that is just too low of gearing for a TPI motor IMO.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

Soon to Come: 7.625" 10 Bolt with 3.42s and Accel TPI Intake Base

 

Richmond's aren't as bad as everybody says, I think it has alot to do w/ who installs, and how its setup. I put Richmond 3.73s in my T/A, and then drove it 200 miles, raced it all day, and drove it 200 miles back home (after proper break-in of course) w/o a lick of trouble, and it still rock solid (knock on wood). To see my install, click HERE.

As for what ratio, it depends on what motor you have. I have a TPI Converted LG4 w/ stock TPI manifolds, and stock LG4 Exhaust manifolds, so switching to 3.73 didn't really net a gain, although I can now "bark 'em" on the 1-2 shift, but the anemic engine can't support the RPMs needed to make the 3.73 work. I simply run out of steam at 4500+ RPMs, so I would have probably been better w/ 3.42 or something.

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'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
Whatever chip I feel like burning,
JET AFPR, Ported Plenum,
TB Coolant Bypass, Custom Cold Air,
SSM SFC, KYB Shocks, Boxed LCAs, Wonder Bar,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE

 

Depends on what you want to do. You said you use it for street/strip. The 3.73s should be fairly solid. I've got 3.23s in mine, can destroy a Honda off the line, and still get 25 mpg on the 500 mile drive home. Stay with Richmond.

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1985 Camaro Z28
minor mods, wires, filters, etc., Accel SuperCoil/cap/rotor,
305 bored .030 over, new pistons, cam, lifters, timing kit, water pump, high-flow cat (3" out), Dynomax Afterburner muffler (2.5" out), O2 sensor, MAF sensor, 160W JVC head unit, Rockford Fosgate Punch 360 amp, 2 JL10W0 subs, custom box.
"You may laugh in the face of fear, but it'll be a nervous, unconvincing little laugh."

 

gears like the cam are better if they are a shade under what you think is ideal for your engine. my car would come off the line fierce with 3.73's but the rpms would be too high on the highway. i think that 3.42's would be perfect for my car but i don't think it is worth changeing the 3.23's i have for 3.42's. i might go 2 tenths quicker but for $700 (i would have to recalibrate the speedo too) there are better ways to spend my money. your car should work great with 3.73's they should e right for your car because it can turn the rpms nessisary for the gear ratio. I would say go with presision gear.

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90 IROC l98
last season best corected 13.62 @102
mods
full exhaust, AFPR, pulley, jet stage 1 chip, billet servo, 52mm throttle body, slp runners and some 1.6 RR's and a few other little things.
243 RWHP and 342 RWTQ with hot engine and 90 octain fuel

 

factory 3.23 gears.

 

Richmonds are Okay, but they are noisier than other gears. I recommend GM/Motive Gears. I used to work for the manufacturer and they are excellent. Make sure the gears you buy are made in the USA, not Italy. The Italian gear sets are crap.

 

When ordering the gears how would u know where the gears are comming from?

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86 Tramaro 90% Trans Am/ 10% IROC/Z (nose, hood,& fenders)
Trans Am Mods as of 1/10/01
3inch
T.E.S/Flowmaster setup,gutted cat,gutted maf,relocated mat,373 gears,upgraded factory chip,255 liter h/press. walpro f/pump & throttle body coolant bypass
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