3.73 or 4.11

Vamp89 · 03-05-2006, 11:58 AM

I have a 89 GT and this is whats done so far( Comp Cams XE282HR:282-290 duration, 1.7 roller rockers,stock heads for now, under drive pulleys,bbk cold air,73mm mass air meter,70mm throttle body, trick flow street heat intake, flow masters) runs real good but not sure what gears I should run. Any ideas would be helpful thanks.

rwhite65 · 03-05-2006, 06:06 PM

U will get tons of replys on this, a lot depends on the majority of driving u plan on doing (highway vs street).

For an auto, I say 4.10's...as I have them in mine and love them.
Ryan

Coupe50h · 03-05-2006, 07:44 PM

What do you have now?
3.73's are good all around, 4.10's can really put on a show with slicks and aggressive driving on a track, I chose to have something in between, 3.90's, yes they do make them for the 8.8, i found that they are rare in 8.8's though
I heard too many stories about hitting the rev limiter in 4th gr with 4.10's on the strip, i can see how, cuz my car is about 5800-6k at the topend.

Vamp89 · 03-05-2006, 09:08 PM

It has stock gears that I think are 3.08s, when I looked up the code, and I forgot to mention it has a t-5

~The Jester~ · 03-05-2006, 10:10 PM

One of my favorite quotes!

"Don't fear the gear!"

If you have a T5, throw 4.30's in it and don't look back.

Tire size comes into play a bit, but unless you're running something that has a 26 or smaller diameter, go with the 4.10

Absolutely no way I would even consider 3.73's with a stick car. 4.10's or better. The "ass dyno" will thank you!

Vamp89 · 03-06-2006, 11:40 AM

I have stock rims with 225/50/15(front), 245/50/15(rear)

~The Jester~ · 03-07-2006, 07:59 AM

That's a bit small on the rear diameter, go with the 4.10's

If you think there's room for more later (you prolly will) you can always jump up to 4.30's.

HoodStrype · 03-07-2006, 12:53 PM

I have 3.73's and love them. If you go with 4.10's you might not like long trips. But like Jester says, "don't fear the gear"

simon clemens · 03-15-2006, 10:23 AM

These will be the facts you need for your ratio's and rear tyre 245/50/15 with a standard T5

The columns arn't in alignment when I cut and pasted so you may have to re-align them.. columns are: gear 1~5/ box ratio 1~5 / RPM 1000~7000

T5 WITH 3.73
Gear Ratio 1000 2000 3000 4000 5000 5500 5800 6000 6500 7000
1 3.35 9 19 28 38 47 52 55 57 61 66
2 1.99 16 32 48 64 79 87 92 95 103 111
3 1.33 24 48 71 95 119 131 138 143 155 166
4 1 32 63 95 127 158 174 183 190 206 221
5 0.68 47 93 140 186 233 256 270 279 302 326
Revs at 60 km/h in fourth 1897 Revs at 110 km/h in top 2364

T5 WITH 4.11
Gear Ratio 1000 2000 3000 4000 5000 5500 5800 6000 6500 7000
1 3.35 9 17 26 34 43 47 50 51 56 60
2 1.99 14 29 43 58 72 79 84 87 94 101
3 1.33 22 43 65 86 108 119 125 130 140 151
4 1 29 57 86 115 144 158 167 172 187 201
5 0.68 42 84 127 169 211 232 245 253 274 296
Revs at 60 km/h in fourth 2090 Revs at 110 km/h in top 2605

The math is now done for you... just make your selection
I have 3.73 ratio with 275/60/15 and is good for street use and abuse!

Simmo...

Vamp89 · 03-15-2006, 10:34 AM

Thanks simon

03-05-2006, 11:58 AM	#1
Vamp89 Registered Member Join Date: Mar 2006 Location: Fort Wayne, Indiana Posts: 49	3.73 or 4.11 I have a 89 GT and this is whats done so far( Comp Cams XE282HR:282-290 duration, 1.7 roller rockers,stock heads for now, under drive pulleys,bbk cold air,73mm mass air meter,70mm throttle body, trick flow street heat intake, flow masters) runs real good but not sure what gears I should run. Any ideas would be helpful thanks.

03-05-2006, 06:06 PM	#2
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	Re: 3.73 or 4.11 U will get tons of replys on this, a lot depends on the majority of driving u plan on doing (highway vs street). For an auto, I say 4.10's...as I have them in mine and love them. Ryan __________________ 65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored

03-05-2006, 07:44 PM	#3
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	Re: 3.73 or 4.11 What do you have now? 3.73's are good all around, 4.10's can really put on a show with slicks and aggressive driving on a track, I chose to have something in between, 3.90's, yes they do make them for the 8.8, i found that they are rare in 8.8's though I heard too many stories about hitting the rev limiter in 4th gr with 4.10's on the strip, i can see how, cuz my car is about 5800-6k at the topend. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

03-05-2006, 09:08 PM	#4
Vamp89 Registered Member Join Date: Mar 2006 Location: Fort Wayne, Indiana Posts: 49	Re: 3.73 or 4.11 It has stock gears that I think are 3.08s, when I looked up the code, and I forgot to mention it has a t-5

03-05-2006, 10:10 PM	#5
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: 3.73 or 4.11 One of my favorite quotes! "Don't fear the gear!" If you have a T5, throw 4.30's in it and don't look back. Tire size comes into play a bit, but unless you're running something that has a 26 or smaller diameter, go with the 4.10 Absolutely no way I would even consider 3.73's with a stick car. 4.10's or better. The "ass dyno" will thank you! __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

03-06-2006, 11:40 AM	#6
Vamp89 Registered Member Join Date: Mar 2006 Location: Fort Wayne, Indiana Posts: 49	Re: 3.73 or 4.11 I have stock rims with 225/50/15(front), 245/50/15(rear)

03-07-2006, 07:59 AM	#7
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: 3.73 or 4.11 That's a bit small on the rear diameter, go with the 4.10's If you think there's room for more later (you prolly will) you can always jump up to 4.30's. __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

03-07-2006, 12:53 PM	#8
HoodStrype Rearview Mirror Haze Join Date: May 1999 Location: Huntsville, Alabama...a.k.a. "HuntsVegas" Posts: 387	Re: 3.73 or 4.11 I have 3.73's and love them. If you go with 4.10's you might not like long trips. But like Jester says, "don't fear the gear" __________________ 93 lx Notch 01 GT ...the epitome of Murphy's Law

03-15-2006, 10:23 AM	#9
simon clemens Registered Member Join Date: Oct 2005 Posts: 3	Re: 3.73 or 4.11 These will be the facts you need for your ratio's and rear tyre 245/50/15 with a standard T5 The columns arn't in alignment when I cut and pasted so you may have to re-align them.. columns are: gear 1~5/ box ratio 1~5 / RPM 1000~7000 T5 WITH 3.73 Gear Ratio 1000 2000 3000 4000 5000 5500 5800 6000 6500 7000 1 3.35 9 19 28 38 47 52 55 57 61 66 2 1.99 16 32 48 64 79 87 92 95 103 111 3 1.33 24 48 71 95 119 131 138 143 155 166 4 1 32 63 95 127 158 174 183 190 206 221 5 0.68 47 93 140 186 233 256 270 279 302 326 Revs at 60 km/h in fourth 1897 Revs at 110 km/h in top 2364 T5 WITH 4.11 Gear Ratio 1000 2000 3000 4000 5000 5500 5800 6000 6500 7000 1 3.35 9 17 26 34 43 47 50 51 56 60 2 1.99 14 29 43 58 72 79 84 87 94 101 3 1.33 22 43 65 86 108 119 125 130 140 151 4 1 29 57 86 115 144 158 167 172 187 201 5 0.68 42 84 127 169 211 232 245 253 274 296 Revs at 60 km/h in fourth 2090 Revs at 110 km/h in top 2605 The math is now done for you... just make your selection I have 3.73 ratio with 275/60/15 and is good for street use and abuse! Simmo...

03-15-2006, 10:34 AM	#10
Vamp89 Registered Member Join Date: Mar 2006 Location: Fort Wayne, Indiana Posts: 49	Re: 3.73 or 4.11 Thanks simon

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