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Old 04-15-2012, 03:57 PM   #1
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3.73 ratio

How much would a 3.73 gear ratio help with acceleration and how much top speed would I lose.
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Old 04-15-2012, 04:04 PM   #2
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Re: 3.73 ratio

it helps quite a bit with acceleration but the differance is 14% on the speedometer so your speedo will say youre going 14% faster than you actually are. youre top end will drop quite a bit. governed at 115 you will top out at 115 on the speedo but actually 100-101mph with the 3.73's. youll lose quite a bit of gas mileage too. all in all if you dont plan to take your car to the track quite a bit i wouldnt say its worth the money. I just recently put my stock 3.27's back in and kept the tlok.
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Old 04-15-2012, 05:16 PM   #3
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Quote:
Originally Posted by pringle9666
it helps quite a bit with acceleration but the differance is 14% on the speedometer so your speedo will say youre going 14% faster than you actually are. youre top end will drop quite a bit. governed at 115 you will top out at 115 on the speedo but actually 100-101mph with the 3.73's. youll lose quite a bit of gas mileage too. all in all if you dont plan to take your car to the track quite a bit i wouldnt say its worth the money. I just recently put my stock 3.27's back in and kept the tlok.
Alright thanks I will look into it more
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Old 04-16-2012, 09:17 AM   #4
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Re: 3.73 ratio

how often will you really be taking a v6 over 100 mph?
You will have more fun going 0-50,60 mph with those new gears...
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Old 04-16-2012, 09:22 AM   #5
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Re: 3.73 ratio

your stock gearing is 3.27 so 3.73 will be about 12%-14% taller ratio. Thats about 2.5 tenths in the quarter mile~ not a HUGE gain but not horrible. I had these gears put in my 01 V6, I was happy but expected more out of it (reason being I ha da 97 V6 before wtih 2.73 and 2.73 vs 3.73 is a far bigger jump)

gas mileage will go down 1-2mpg highway~ and pick up 1mpg city
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Old 04-16-2012, 09:47 AM   #6
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Re: 3.73 ratio

So where do the gears stop helping with the acceleration or is acceleration better in all 4 gears (automatic)
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Old 04-16-2012, 10:45 AM   #7
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Re: 3.73 ratio

gears are universal

every X driveshaft turns = Y rear tire full rotations

X is rear end gearing and Y is just 1

3.73 driveshaft rotations = 1 rear wheel rotation means you have 3.73 gears.

As you can see it take MORE input to make the rear wheels turn say 600 revolutions per mile vs 3.27 gears by about 14% so... your rpms will be 14% higher than they were

thats PERCENT

so at xmph if you were at 1000 rpms now with 3.73 it will be 1140rpm

at xmph at 4000rpm it would go up to 4560rpm so its a percentage

it increases with rpm does not matter what gear
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Old 04-16-2012, 11:14 AM   #8
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Unless you do alot of highway driving I think 4.10 gears would be a good choice for you especially if you have an automatic.. 4.10 for an automatic is about the same as a 3.73 gear in a 5 speed. If your only doing around town driving and not highway the taller gears will prolly help mpg as well as acceleration because it would take less power to get the car moving
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Old 04-16-2012, 11:15 AM   #9
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Re: 3.73 ratio

very true, autos have worse transmission gearing so they help even out to a manual more so with 4.10s, also one more thing... may as well install a TLOK unit while you are at it (same amount of work basically)

and you MUST be very careful about who you let put it in, if its not done right it can whine and cause all sorts of issues that are not easily fixable (other than buying all new parts and trying again). Also dont buy used parts.
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Old 04-16-2012, 11:49 AM   #10
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Quote:
Originally Posted by SpectorV
very true, autos have worse transmission gearing so they help even out to a manual more so with 4.10s, also one more thing... may as well install a TLOK unit while you are at it (same amount of work basically)

and you MUST be very careful about who you let put it in, if its not done right it can whine and cause all sorts of issues that are not easily fixable (other than buying all new parts and trying again). Also dont buy used parts.
Used gears are never a good idea. Listen to Spector on this. If you pick up a used tlok get it rebuilt with new internals. NEVER let someone tell you it's just fine cause you may find yourself sitting on the curbside banging your head cause the tlok went out and completely ruined your new gears and axleshafts...
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Old 04-16-2012, 12:12 PM   #11
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Re: 3.73 ratio

tlok's are rather cheap to rebuild I believe, new they used to be around 200 bucks~ not sure now.
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