Broke some teeth on the pinion gear questions and options
03-27-2016, 07:27 PM
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Car: 91 RS
Engine: 305 TPI
Transmission: T56
Axle/Gears: Auburn Pro / 3.42
Broke some teeth on the pinion gear questions and options
The rear started to wine on acceleration and then broke a couple of days later. Pulled it apart and the pinion gear is missing some teeth. Currently I am running Auburn pro, Moser axles ( I think 28 spline), Richmond gear, and a stud girdle. The gears that are broken are 3:42. Has anyone put in 3:73 with their T5 and hated it? What is your RPM at 80mph?
Trying to decide if should put another set of gears in or look for something else. Currently I am only putting down around 200rwhp and 300rwtq.
Trying to decide if should put another set of gears in or look for something else. Currently I am only putting down around 200rwhp and 300rwtq.
03-27-2016, 07:46 PM
#2
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Broke some teeth on the pinion gear questions and options
Has anyone put in 3:73 with their T5 and hated it?
80 mph was a bit over 3000 if memory serves; maybe 3100.
If it's a TPI motor, it's too much gear. You can't shift fast enough to keep it in the power band. (below 4200)
03-27-2016, 08:03 PM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Broke some teeth on the pinion gear questions and options
I like motive gears for most GM street cars.
03-27-2016, 09:34 PM
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Car: 1992 Camaro RS
Engine: Rebuilt 350 going in after paint
Transmission: WCT5, 7k & counting behind the 350
Axle/Gears: 4thgen disc rear w/ 3.73 Posi
Re: Broke some teeth on the pinion gear questions and options
I swapped in 3.73 gears from an S10 a couple years ago. First gear on my T5 is EXTREMELY short. I find myself shifting from 1-2 almost immediately, or just pulling out in 2nd if I'm on a flat or downhill. I don't remember my RPM at 80, been quite a while since I had the car up that fast. If Sofa says 3k or so, I'd believe it. Made a nice difference from my stock 3.42 gears.
03-28-2016, 01:07 PM
#5
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Re: Broke some teeth on the pinion gear questions and options
Depends on the T5 used they came with two different 5th gears. The L69 cars came with a T5 and stock 3.73. I run a T5 and 3.73 I think I would enjoy a 3.42 a bit better but not enough to put effort into it. Here are some charts I made when I was deciding what way to go. I run a 0.62 OD hear for highway use and have had both.
Code:
1st 2nt 3rd 4th 5th 2.95 1.94 1.34 1 0.62 500 3 5 8 10 16 1000 7 11 15 20 33 1500 10 16 23 31 49 2000 14 21 31 41 66 2500 17 26 38 51 82 3000 21 32 46 61 99 3500 24 37 53 72 115 4000 28 42 61 82 132 4500 31 47 69 92 148 5000 35 53 76 102 165 5500 38 58 84 112 181 6000 42 63 92 123 198
Code:
1st 2nt 3rd 4th 5th 2.95 1.94 1.34 1 0.73 500 3 5 8 10 14 1000 7 11 15 20 28 1500 10 16 23 31 42 2000 14 21 31 41 56 2500 17 26 38 51 70 3000 21 32 46 61 84 3500 24 37 53 72 98 4000 28 42 61 82 112 4500 31 47 69 92 126 5000 35 53 76 102 140 5500 38 58 84 112 154 6000 42 63 92 123 168
03-29-2016, 09:19 AM
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Car: 1990 Formula Firebird
Engine: 305 TBI (LO3)
Transmission: WC T-5 out of an 88 T/A
Axle/Gears: 10 bolt, 3.42 & Torsen Posi
Re: Broke some teeth on the pinion gear questions and options
The rear started to wine on acceleration and then broke a couple of days later. Pulled it apart and the pinion gear is missing some teeth. Currently I am running Auburn pro, Moser axles ( I think 28 spline), Richmond gear, and a stud girdle. The gears that are broken are 3:42. Has anyone put in 3:73 with their T5 and hated it? What is your RPM at 80mph?
Trying to decide if should put another set of gears in or look for something else. Currently I am only putting down around 200rwhp and 300rwtq.
Trying to decide if should put another set of gears in or look for something else. Currently I am only putting down around 200rwhp and 300rwtq.
03-29-2016, 09:54 AM
#7
Supreme Member
Re: Broke some teeth on the pinion gear questions and options
If you send me your email I can send my excel sheet with T5 speedo gear calculations and speed in gear per RPM with variables for ratio, tire and rear end
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