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Old 06-14-2009, 09:08 AM
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Best R&P for drag racing??

Who makes the strongest ring & pinion for drag racing? I was at the track Saturday and brought the RPM's up to 4800 on the transbrake and when launching, it broke the pinion shaft. I do not know what brand it had in it but need to replace it with one of known quality.

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Old 06-14-2009, 11:47 AM
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I assume (I know) since you're using a brake, you are running pretty fast? Brand doesn't have that much to do with it. If you were running gears designed for the street, you need to go with race gears or 'pro' gears. They are a bit softer than the hardened for longer life street gears and will take the punishment better. How fast are you running....and how heavy is your racer?
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Old 06-14-2009, 04:05 PM
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Quote:
Originally Posted by cranky1
I assume (I know) since you're using a brake, you are running pretty fast? Brand doesn't have that much to do with it. If you were running gears designed for the street, you need to go with race gears or 'pro' gears. They are a bit softer than the hardened for longer life street gears and will take the punishment better. How fast are you running....and how heavy is your racer?
No street uase at all, strictly a bracket racer. Weight is only approx. at about 3500. Basically have an 89 Chev. S10 with a 461 BBC running a TH400 and currently a Auburn full spool and (before it broke), a 4.56 gearset. Tires are 33.0 x 16.0 x 15 Hoosier drag slicks. It hooks hard and with the torque of the BBC and the shock load of the transbrake, it'll take a good one.
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Old 06-14-2009, 04:27 PM
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with your combo the 'pro gear' may be best.

let us know what you find and install
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Old 06-14-2009, 06:30 PM
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Which diff do you have?
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Old 06-14-2009, 06:41 PM
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Quote:
Originally Posted by prostreet6t9
Which diff do you have?
9" Ford w/ 31 spline axles. My pinion yoke is 28 spline
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Old 06-14-2009, 06:49 PM
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Quote:
Originally Posted by S10 Racer
9" Ford w/ 31 spline axles. My pinion yoke is 28 spline
How fast does the car run?
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Old 06-14-2009, 06:55 PM
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Quote:
Originally Posted by prostreet6t9
How fast does the car run?
Well, currently the best is 11.55 off the footbrake with poor 60' times. I posted a thread on this about wanting to get into the 10's. We were trying to see what we could get off the transbrake and snapped the pinion shaft.
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Old 06-14-2009, 06:58 PM
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If I put slicks on my car,My car will run high 9's and I leave @ 5200 on the brake.I'm still running a Non Pro gear set up and have had good luck so far. But if I did,I would probably step up to a Pro gear or maybe even a big pinion set. It might be worth it to step up a little and maybe save money in the long run.
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Old 06-14-2009, 08:17 PM
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If you are racing this 9" with a plain old stock iron case, you will probably break whatever gear you put in it or blow up the case. You should be using a Nodular Iron centersection w/ the Daytona pinion bearing support. The stock grey iron piece is notorious for breaking gears and cases.

IMO you are not even close to needing "Pro" gears. The problem is center case or bearing support flex.

Richmond, Auburn, Motive Gear, Yukon, US/Strange all make good stuff.
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Old 06-14-2009, 10:25 PM
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Quote:
Originally Posted by ericnova72
If you are racing this 9" with a plain old stock iron case, you will probably break whatever gear you put in it or blow up the case. You should be using a Nodular Iron centersection w/ the Daytona pinion bearing support. The stock grey iron piece is notorious for breaking gears and cases.

IMO you are not even close to needing "Pro" gears. The problem is center case or bearing support flex.

Richmond, Auburn, Motive Gear, Yukon, US/Strange all make good stuff.
What he said! A stock Dana 60 housing will take the abuse but not wanting to do that swap, go with what Eric says but I would have thought a stock 9 would take it running those numbers. Also, I'm not real sure if all of the Yukon gears come from but the last two setups I did for a Mopar were made in Korea. The guy I did them for bought kits from Randys Ring and Pinion and they sent those along with bearings made in China and I told him I wouldn't warranty anything....
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Old 06-14-2009, 11:02 PM
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I've had no trouble with quality or set-up with Yukon through Randy's but it has been a year or more since I have installed a set from him. Didn't know that the Yukon gear was from Korea, our bearings and spool came from Moser. No trouble with it in 3 years

Moser Tech told me the 9" needs the nodular center for any kind of reliability at power levels over 400 hp in a drag car. The cost of a full tilt 9" is why we went with the Dana 60- It's bulletproof!

IMO the stock 9' is far from being the "Wonder Rear" that people give high praise to, especially at todays power levels -- its not the 60's anymore. Would have cost us 2800+ to do an all the bells and whistles 9", the Dana is stronger at less than 1/2 that amount.
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Old 06-14-2009, 11:39 PM
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Quote:
Originally Posted by ericnova72
I've had no trouble with quality or set-up with Yukon through Randy's but it has been a year or more since I have installed a set from him. Didn't know that the Yukon gear was from Korea, our bearings and spool came from Moser. No trouble with it in 3 years

Moser Tech told me the 9" needs the nodular center for any kind of reliability at power levels over 400 hp in a drag car. The cost of a full tilt 9" is why we went with the Dana 60- It's bulletproof!

IMO the stock 9' is far from being the "Wonder Rear" that people give high praise to, especially at todays power levels -- its not the 60's anymore. Would have cost us 2800+ to do an all the bells and whistles 9", the Dana is stronger at less than 1/2 that amount.
Don't know if all of Yukon gears are made there. Doesn't say on the box but the gears are stamped with a KR on it iirc. Anyways, whatever the code was, it came out being Korea after researching it out. Probably fine. And I've been using Dana's for years. Just make sure you solid weld the tubes to the center section. Haven't seen it happen very often but from time to time, one that's not welded will slip and it's also a good idea to use a support cover too.
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Old 06-14-2009, 11:44 PM
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Cranky, thats the set-up we are running to a T!
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Old 06-15-2009, 04:55 AM
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Quote:
Originally Posted by ericnova72
I've had no trouble with quality or set-up with Yukon through Randy's but it has been a year or more since I have installed a set from him. Didn't know that the Yukon gear was from Korea, our bearings and spool came from Moser. No trouble with it in 3 years

Moser Tech told me the 9" needs the nodular center for any kind of reliability at power levels over 400 hp in a drag car. The cost of a full tilt 9" is why we went with the Dana 60- It's bulletproof!

IMO the stock 9' is far from being the "Wonder Rear" that people give high praise to, especially at todays power levels -- its not the 60's anymore. Would have cost us 2800+ to do an all the bells and whistles 9", the Dana is stronger at less than 1/2 that amount.
Agreed that the Dana 60 is stronger but it weighs 70 lbs more than the 9".
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