auburn rear help
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Teching In
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From: indian head, maryland
auburn rear help ok so i have a stock 10bolt. i just ordered up 4.30 motive gears and i was ADVISED to go with the auburn posi because i dont have enough money for a new rear. and im lookin and i need to know what spline axles i got and wiether i would fall into the 3.08 and down 26 spline. or 3.08 and down 28 spline. or 3.23 and up 28 spline. or 3.73 and up 26 spline. i have a 02 ws6 6spd. thanks for any help.
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From: Houston, TX
Dude, for the love of god.....DO NOT **** away money at all on a 10-bolt. That is a huge waste of time and money. AND on top of that 4.30 is a HUGE gear, with a stock rev limiter be ready to shift into 5th at around 107mph. You will not make it through the traps in the 1/4mi, even with 4.10 gears and a higher rev limiter at 6,600rpm's I didn't make it through with heads/cam.
Just my FYI, spend your money elsewhere.
Peace,
Craig.
P.S. - Here is a good site to see how gears effect your car:
http://www.f-body.org/gears/
Just my FYI, spend your money elsewhere.
Peace,
Craig.
P.S. - Here is a good site to see how gears effect your car:
http://www.f-body.org/gears/
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With a 28" tire you could go 120mph through the traps at 6542rpm. Thats third gear with a 4L60/80 and fourth for a T56.
Thats is if the rear held which I also doubt.
I agree the money could be spent better but I've learned people seldom listen the first time.
Thats is if the rear held which I also doubt.
I agree the money could be spent better but I've learned people seldom listen the first time.
Last edited by meandmyls1; Mar 12, 2008 at 08:24 AM.
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From: Houston, TX
Peace,
Craig.
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The calculation I've always used is gear ratio multiplied by trans ratio multiplied by 355 (unlocked converter, 336 locked converter or manual) multiplied by MPH and divided by rear tire diameter.
In this case 4.30 x 355 x 120 / 28 = 6542.
You can also compare your MPH vs RPM with this calculation if your speedo doesn't work, and if you have a GPS navigator. You can verify that this works by looking at your tach and your gps mph if it has it.
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From: Houston, TX
No, thats with 4.30's
The calculation I've always used is gear ratio multiplied by trans ratio multiplied by 355 (unlocked converter, 336 locked converter or manual) multiplied by MPH and divided by rear tire diameter.
In this case 4.30 x 355 x 120 / 28 = 6542.
You can also check your MPH with this calculation if your speedo doesn't work, and if you have a GPS navigator you can verify that this works by looking at your tach and your gps mph if it has it.
The calculation I've always used is gear ratio multiplied by trans ratio multiplied by 355 (unlocked converter, 336 locked converter or manual) multiplied by MPH and divided by rear tire diameter.
In this case 4.30 x 355 x 120 / 28 = 6542.
You can also check your MPH with this calculation if your speedo doesn't work, and if you have a GPS navigator you can verify that this works by looking at your tach and your gps mph if it has it.
ok so i have a stock 10bolt. i just ordered up 4.30 motive gears and i was ADVISED to go with the auburn posi because i dont have enough money for a new rear. and im lookin and i need to know what spline axles i got and wiether i would fall into the 3.08 and down 26 spline. or 3.08 and down 28 spline. or 3.23 and up 28 spline. or 3.73 and up 26 spline.
i have a 02 ws6 6spd. thanks for any help.
i have a 02 ws6 6spd. thanks for any help.
Craig.
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It doesn't matter, he could still use 4.30's and not over rev. In fact it makes it easier to calculate because you have no converter slip. So at 120 he's going 6542 rpm still. Possible, but the rear will most likely break.
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From: Houston, TX
You posted THIS:
HIS M6 car in 3rd gear will not even come close to 120mph with 4.30/28", but it will do 128mph in 4th gear, yes 1 to 1 gear. But you started your opinions with an A4 car, which he does NOT have. Plus he has zero needs for a 4.30 gear, and to get 28" tall tires brings that all down to where he is not gaining from that gear at all except that its thinner and will break alot easier.
Moser 12-bolt, 9" with 3.73's for an M6 car NO MORE, and call it a day!
The rear end will break you are correct, on a hard launch it will.
Peace,
Craig.
Moser 12-bolt, 9" with 3.73's for an M6 car NO MORE, and call it a day!
The rear end will break you are correct, on a hard launch it will.
Peace,
Craig.
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From: Grande Prairie, AB. That's Canada you hoser.
"Moser 12-bolt, 9" with 3.73's for an M6 car NO MORE, and call it a day!"
Nothing that 4500 installed can take care of.
Or for 4.5 hours of labour at your favorite shop, try the gears and if you don't like them, get new ones.
Even at the $380 I paid for my 3.73's + 400 install, you can enjoy the car as is for a while. THEN when the rear fails down the road, you can go all out.
In the mean time, with the difference of 3500 saved in not getting the new rearend installed, you could be putting that towards other parts for your car.
I dropped 1K into my stock read after the front pinion bearing had the hard surfacing flake off and chew the hell out of the rollers on the bearing. The front pinion was also starting to seep as it was pushing forward slightly.
I opted for all new bearings, wheel bearings and seals + the new gear set because there was no added cost in labour.
So far so good with several low 13s track passes and several thousand km's.
There's also a thread called "bulletproof 10bolt?" that shows a very cool way tor strengthen the stock rearend for around 800 bucks in materials.
It's seen LOTS of track passes with a fairly stout car.
Either way, its YOUR choice.
Ask other users questions about how they liked there's gear ratios, test drive if you can... then go from there.
Nothing that 4500 installed can take care of.
Or for 4.5 hours of labour at your favorite shop, try the gears and if you don't like them, get new ones.
Even at the $380 I paid for my 3.73's + 400 install, you can enjoy the car as is for a while. THEN when the rear fails down the road, you can go all out.
In the mean time, with the difference of 3500 saved in not getting the new rearend installed, you could be putting that towards other parts for your car.
I dropped 1K into my stock read after the front pinion bearing had the hard surfacing flake off and chew the hell out of the rollers on the bearing. The front pinion was also starting to seep as it was pushing forward slightly.
I opted for all new bearings, wheel bearings and seals + the new gear set because there was no added cost in labour.
So far so good with several low 13s track passes and several thousand km's.
There's also a thread called "bulletproof 10bolt?" that shows a very cool way tor strengthen the stock rearend for around 800 bucks in materials.
It's seen LOTS of track passes with a fairly stout car.
Either way, its YOUR choice.
Ask other users questions about how they liked there's gear ratios, test drive if you can... then go from there.
Administrator
Joined: Nov 2001
Posts: 29,404
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From: Houston, TX
"Moser 12-bolt, 9" with 3.73's for an M6 car NO MORE, and call it a day!"
Nothing that 4500 installed can take care of.
Or for 4.5 hours of labour at your favorite shop, try the gears and if you don't like them, get new ones.
Even at the $380 I paid for my 3.73's + 400 install, you can enjoy the car as is for a while. THEN when the rear fails down the road, you can go all out.
In the mean time, with the difference of 3500 saved in not getting the new rearend installed, you could be putting that towards other parts for your car.
I dropped 1K into my stock read after the front pinion bearing had the hard surfacing flake off and chew the hell out of the rollers on the bearing. The front pinion was also starting to seep as it was pushing forward slightly.
I opted for all new bearings, wheel bearings and seals + the new gear set because there was no added cost in labour.
So far so good with several low 13s track passes and several thousand km's.
There's also a thread called "bulletproof 10bolt?" that shows a very cool way tor strengthen the stock rearend for around 800 bucks in materials.
It's seen LOTS of track passes with a fairly stout car.
Either way, its YOUR choice.
Ask other users questions about how they liked there's gear ratios, test drive if you can... then go from there.
Nothing that 4500 installed can take care of.
Or for 4.5 hours of labour at your favorite shop, try the gears and if you don't like them, get new ones.
Even at the $380 I paid for my 3.73's + 400 install, you can enjoy the car as is for a while. THEN when the rear fails down the road, you can go all out.
In the mean time, with the difference of 3500 saved in not getting the new rearend installed, you could be putting that towards other parts for your car.
I dropped 1K into my stock read after the front pinion bearing had the hard surfacing flake off and chew the hell out of the rollers on the bearing. The front pinion was also starting to seep as it was pushing forward slightly.
I opted for all new bearings, wheel bearings and seals + the new gear set because there was no added cost in labour.
So far so good with several low 13s track passes and several thousand km's.
There's also a thread called "bulletproof 10bolt?" that shows a very cool way tor strengthen the stock rearend for around 800 bucks in materials.
It's seen LOTS of track passes with a fairly stout car.
Either way, its YOUR choice.
Ask other users questions about how they liked there's gear ratios, test drive if you can... then go from there.
His 10-bolt will not last 11entybillions years as long as your A4 guys rear ends last.....AGAIN he has an M6.
Rear ends do not cost $3,500. How about $2,500 WITH all the bells and whistles.
I will say it again:
OP HAS AN M6 CAR!!!
A4 guys, just stay out of this thread. No offense, you're just not helping...at all.
Peace,
Craig.
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Last edited by meandmyls1; Mar 12, 2008 at 08:33 AM.
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From: Grande Prairie, AB. That's Canada you hoser.
Again, he does NOT have an A4 car.
His 10-bolt will not last 11entybillions years as long as your A4 guys rear ends last.....AGAIN he has an M6.
Rear ends do not cost $3,500. How about $2,500 WITH all the bells and whistles.
A4 guys, just stay out of this thread. No offense, you're just not helping...at all.
Peace,
Craig.
His 10-bolt will not last 11entybillions years as long as your A4 guys rear ends last.....AGAIN he has an M6.
Rear ends do not cost $3,500. How about $2,500 WITH all the bells and whistles.
A4 guys, just stay out of this thread. No offense, you're just not helping...at all.
Peace,
Craig.
Take a pill and re-read my post.
You missed a vital word... INSTALLED.
Originally Posted by "dictionary.com
in·stal /ɪnˈstɔl/ Pronunciation Key - Show Spelled Pronunciation[in-stawl]
–verb (used with object), -stalled, -stal·ling."
–verb (used with object), -stalled, -stal·ling."
I hardly think this is a M6 v.s. A4 know-how debate.
The rearends are the same minus the gears (series 2 carrier for 2.73's and series 3 for 3.23 and up ratios) and for the one in 1000 that contains Borg Warner parts. One is just as strong as the next.
OP never stated he or she was going to drag race, auto-cross or do the dukes of hazard with his car... he's just asking about axles he has.
Meanwhile everyone else has covered carriers, ratio formulas, aftermarket rearends, max mph of certain gears, trans ratios, ect, ect...
i need to know what spline axles i got and weather i would fall into the 3.08 and down 26 spline. or 3.08 and down 28 spline. or 3.23 and up 28 spline. or 3.73 and up 26 spline.
you have 3:42s stock
All f body rears came with 28 spline axles since the late 80's.
So you need a 3.23 and up 28 spline.
So you need a 3.23 and up 28 spline.
Nuf said.
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You posted THIS:
HIS M6 car in 3rd gear will not even come close to 120mph with 4.30/28", but it will do 128mph in 4th gear, yes 1 to 1 gear. But you started your opinions with an A4 car, which he does NOT have. Plus he has zero needs for a 4.30 gear, and to get 28" tall tires brings that all down to where he is not gaining from that gear at all except that its thinner and will break alot easier.
Moser 12-bolt, 9" with 3.73's for an M6 car NO MORE, and call it a day!
The rear end will break you are correct, on a hard launch it will.
Peace,
Craig.
HIS M6 car in 3rd gear will not even come close to 120mph with 4.30/28", but it will do 128mph in 4th gear, yes 1 to 1 gear. But you started your opinions with an A4 car, which he does NOT have. Plus he has zero needs for a 4.30 gear, and to get 28" tall tires brings that all down to where he is not gaining from that gear at all except that its thinner and will break alot easier.
Moser 12-bolt, 9" with 3.73's for an M6 car NO MORE, and call it a day!
The rear end will break you are correct, on a hard launch it will.
Peace,
Craig.
It might make a person wonder why he wants to put 4.30's in a 10 bolt, but now it makes a person wonder why such a big deal is being made about what I posted. Good thing I'm a good speller huh?
One ALSO might wonder why the hell we're in an arguement about what trans the guy has when he's simply asking WHAT SERIES CARRIER HE HAS!
The OP never asked for an opinion.
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From: Houston, TX
A "cheque?" We call them check's here ....dictionary.com, and $2,000 to install or $4,500 for one to be installed is retarted, and I believe a village is looking for you guys.
INSTALLED????..how about DO IT YOURSELF! But again, it does not cost 2k to install one.
What "carrier" this guy has? Its a 3-series carrier, thats what all stock ones are. It was ALL already cover before the wonder twins came in here with their A4 bable.
Peace,
Craig.
INSTALLED????..how about DO IT YOURSELF! But again, it does not cost 2k to install one.
What "carrier" this guy has? Its a 3-series carrier, thats what all stock ones are. It was ALL already cover before the wonder twins came in here with their A4 bable.
Peace,
Craig.
I was not aware that Motive offered a 4.30 gear for the 10 bolt 7.5/7.625 rear.
Please give me a part number and the source if you don't mind I would be interested in noting that information.
The Auburn part numbers that would be applicable for your 28 spline axles and gear choice would be as follows:
Auburn High performance series Part # 542040
Auburn Pro series Part # 542046
I hope this information helps with your ongoing upgrades.
Please give me a part number and the source if you don't mind I would be interested in noting that information.
The Auburn part numbers that would be applicable for your 28 spline axles and gear choice would be as follows:
Auburn High performance series Part # 542040
Auburn Pro series Part # 542046
I hope this information helps with your ongoing upgrades.