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what gears do i have

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Old 11-04-2012, 03:22 PM
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Default what gears do i have

Just bought a 98 ws6 but dnt know what differential gears i have it gots a summit racing cover on the differintial and da owner said it wasnt stock how can i find out
Old 11-04-2012, 03:25 PM
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4.56. lol
Old 11-04-2012, 03:49 PM
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Auto or stick? Go drive and get up to 70mph. Look at RPM an report back...
Old 11-04-2012, 03:56 PM
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Take the cover off. Numbers wil be stamped on the ring gear. Divide the big number by the small number and thats your ratio.

For example, a 373 wil have 41 and 11. So 41 divided by 11 is 3.73
Old 11-04-2012, 06:22 PM
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Its a 6 speed manual and at 70 its around 1950 rpms
Old 11-04-2012, 07:10 PM
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Sounds like 3.73
Old 11-04-2012, 09:14 PM
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Thanks and are 373 gears better than 410 and the stock one
Old 11-04-2012, 09:20 PM
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It depends on what you want to do with the car. Its all personal preference. The lower ratio you go on gear, the smaller therefore weaker they become in the stock 10 bolt.
Old 11-04-2012, 09:44 PM
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Well i use it just on saterdays and sunday when its sunny i dyno tested it and it has 505 hp and 565 tq and it great on gas get over 18 mpg in city so i guess ill keep those 373 gears i guess it just has a lower top speed than 410
Old 11-04-2012, 09:48 PM
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Those are some big numbers. Do you know the exact mods you have?
Old 11-04-2012, 09:55 PM
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Mmm the guy i bought it from said the engine was tune new cam and heads and portes and it has longtube headers with straight pipes no cats and it is set up to take nos but never have use it all i need is to buy a nos tank and i know the suspension and the bottom of tge car is reinforced so it wont bend and some other stuff that to tell u the true i cant remember cuz i was to happy that i was getting it for $5800
Old 11-04-2012, 10:07 PM
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Sounds like a good combo. Post a dyno graph and the more experienced guys on here can help you more. But make sure you post in the right section..
Old 11-04-2012, 10:11 PM
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Ok n wat section would u recommend cuz im new to this stuff
Old 11-04-2012, 10:14 PM
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If you post the dyno, post it here https://ls1tech.com/forums/dynamomet...omparisons-65/
Old 11-06-2012, 10:50 AM
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Originally Posted by ws6shine
Its a 6 speed manual and at 70 its around 1950 rpms
This would put you right at a 4.10 gear. Assuming you have a stock size tire and were in 6th gear.
Originally Posted by alexus6798
Sounds like 3.73
If the op was in 6th gear when he took the reading then he'd be right around 85 with 3.73 at that rpm it sounds like he has 4.10s
Originally Posted by ws6shine
Thanks and are 373 gears better than 410 and the stock one
Not really 3.73's wouldnt be much difference over stock and wouldnt be worth it, 4.10s are the go to gear with an m6 so that makes sense it would have those
Old 11-06-2012, 01:04 PM
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Put rear of car on jack stands, put car in neutral, mark driveshaft, have buddy spin tire one full revolution and count the revolutions of the driveshaft.
Quick and accurate determination.
Old 11-08-2012, 05:44 PM
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You sir, have 4.10 gears.
Old 11-08-2012, 08:50 PM
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Originally Posted by redbird555
This would put you right at a 4.10 gear. Assuming you have a stock size tire and were in 6th gear.

If the op was in 6th gear when he took the reading then he'd be right around 85 with 3.73 at that rpm it sounds like he has 4.10s


Not really 3.73's wouldnt be much difference over stock and wouldnt be worth it, 4.10s are the go to gear with an m6 so that makes sense it would have those
Yes it was in six gear and the car has 17inch wheels in front and 19s in back so i would think they are 410 cuz the bird is real fast and has very quick acceleration



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