What gears to get ?
Thread Starter
Le Mans Master
Joined: Jan 2003
Posts: 6,187
Likes: 309
From: SIMSBURY CT
St. Jude Donor '07 thru '25
What gears to get ?
What is the best gear upgrade for an automatic 1989?
It has 2:59s now.
The car is basically stock now with just open lid, air foil, and Borla mufflers.
Upgrades in the future will probably just be bolt-ons, and that may be a year+ ? from now, maybe longer, so I want to go with gears I can live with now, and not have to change when I get around to future mods.
This car is street use only. I know a 3:07 would work well but how about higher, like 3:55s? Any suggestions?
It has 2:59s now.
The car is basically stock now with just open lid, air foil, and Borla mufflers.
Upgrades in the future will probably just be bolt-ons, and that may be a year+ ? from now, maybe longer, so I want to go with gears I can live with now, and not have to change when I get around to future mods.
This car is street use only. I know a 3:07 would work well but how about higher, like 3:55s? Any suggestions?
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Originally Posted by CTYANK2
What is the best gear upgrade for an automatic 1989?
It has 2:59s now.
The car is basically stock now with just open lid, air foil, and Borla mufflers.
Upgrades in the future will probably just be bolt-ons, and that may be a year+ ? from now, maybe longer, so I want to go with gears I can live with now, and not have to change when I get around to future mods.
This car is street use only. I know a 3:07 would work well but how about higher, like 3:55s? Any suggestions?
It has 2:59s now.
The car is basically stock now with just open lid, air foil, and Borla mufflers.
Upgrades in the future will probably just be bolt-ons, and that may be a year+ ? from now, maybe longer, so I want to go with gears I can live with now, and not have to change when I get around to future mods.
This car is street use only. I know a 3:07 would work well but how about higher, like 3:55s? Any suggestions?
i have an 88 4+3 with a 3.07 stock gear, i am going to a 3.54 gear out of a 95 manual car.......i know i have a dana 44, and you have a dana 36, but a 3,54 is close to a 3.55.
if i were you i would go a little higher then a 3.07, i think a 3.73 is too much for a stock L-98.
Team Owner
Joined: Sep 2001
Posts: 62,146
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
3.54 would be the only one really worth upgrading to, but it still is too much gear for the L98.
I think your money would be better spent by buying a higher stall TC, like 2200rpm.
I think your money would be better spent by buying a higher stall TC, like 2200rpm.
Race Director
Joined: May 2003
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Originally Posted by vader86
3.54 would be the only one really worth upgrading to, but it still is too much gear for the L98.
I think your money would be better spent by buying a higher stall TC, like 2200rpm.
I think your money would be better spent by buying a higher stall TC, like 2200rpm.
Team Owner
Joined: Sep 2001
Posts: 62,146
Likes: 1,730
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Originally Posted by 88BlackZ-51
will 3.54 bring my e.t. down............a have a 4+3.
It wont affect your 1/4mi times in a positive way, no. It may even raise your time.
Unless you switch to a Miniram, there is no need.
Team Owner
Joined: Mar 2000
Posts: 83,383
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From: Boston, MA
Going from a 2.59 to the 3.07 should makes a huge difference with a stock L98. The #s may not be all that different, but the engine likes it. It should bring the car into the 14.0 range if not a touch better.
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Originally Posted by 88BlackZ-51
u think that is tt much gear? scorp seems to think so. my mods are in my signature......will 3.54 bring my e.t. down............a have a 4+3.
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Team Owner
Joined: Sep 2001
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From: Athens AL
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Siameseing and portwork will not change our opinion on that, even fully ported youll run flat out of breath up top, so quickly with 3.54s that youll probably lose time.
You have to change to a totally different intake to take advantage of lower gear ratios.
You have to change to a totally different intake to take advantage of lower gear ratios.
Race Director
Joined: May 2003
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Originally Posted by vader86
Siameseing and portwork will not change our opinion on that, even fully ported youll run flat out of breath up top, so quickly with 3.54s that youll probably lose time.
You have to change to a totally different intake to take advantage of lower gear ratios.
You have to change to a totally different intake to take advantage of lower gear ratios.
you have msn messenger? so if i go with the superram, then i would be fine with the gear? u see i can get the gear installed for about $600 CDN, and i think that is cheap, that is about $500 U.S.
but i have one more outing to the track oct 23rd, and the guy wants to install them on tuesday.......i don't know what to do.....gee!!
Race Director
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Originally Posted by vader86
Siameseing and portwork will not change our opinion on that, even fully ported youll run flat out of breath up top, so quickly with 3.54s that youll probably lose time.
You have to change to a totally different intake to take advantage of lower gear ratios.
You have to change to a totally different intake to take advantage of lower gear ratios.
first off i am not saying you are scorp are wrong, because u guys know way more then i do.....just trying to understand that's all.
http://www.f-body.org/gears/ on this site it states that if i was to get 3.54 gears i would cross the line at this rpm's at these mph's...
4200- 91 MPH
4300- 93 MPH
4400-95 MPH
4500- 97 MPH
4600- 99 MPH
4700- 101 MPH
4800- 104 MPH
and with 3.07's it is like this in 4th....
3900-97 MPH
4000-99 MPH
4100-102 MPH
4200-104 MPH
4300-107 MPH
my last time slip was 14.02@100.60 MPH, so i guess i am crossing the line at around 4000 rpm's.
i figured the 3.54's would get me to the line quicker, and i could hold 4th to 4700 RPM's, that is all.......i am probably wrong, but u cant blame a guy for asking, or researching the heck out of it.
Race Director
Joined: May 2003
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Originally Posted by vader86
Siameseing and portwork will not change our opinion on that, even fully ported youll run flat out of breath up top, so quickly with 3.54s that youll probably lose time.
You have to change to a totally different intake to take advantage of lower gear ratios.
You have to change to a totally different intake to take advantage of lower gear ratios.
Thread Starter
Le Mans Master
Joined: Jan 2003
Posts: 6,187
Likes: 309
From: SIMSBURY CT
St. Jude Donor '07 thru '25
So, on a stock L98 automatic, it sounds like a small improvement with the 3:07s and questionable improvement with the 3:54s. (I guess the 3:54 would take off quicker? and loose some pull at higher speeds?)
If that is the case, is there anything inbetween that would make sense?
If that is the case, is there anything inbetween that would make sense?
Melting Slicks
Joined: Jun 2004
Posts: 3,032
Likes: 4
Originally Posted by scorp508
Going from a 2.59 to the 3.07 should makes a huge difference with a stock L98. The #s may not be all that different, but the engine likes it. It should bring the car into the 14.0 range if not a touch better.
on an L98, with stock heads and cam, I've always read that the 3.07 was the best....
Race Director
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Originally Posted by mikey whipreck
on an L98, with stock heads and cam, I've always read that the 3.07 was the best....well i guess i should just buy the gears, and get them installed after some motorwork.....is that a better idea vadar, and brian?