3.54 vs 3.73 performance difference
#2648597
04/24/19 08:10 PM
04/24/19 08:10 PM
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Joined: Jun 2007
Posts: 1,167 clarks summit pa
73cuda340
OP
super stock
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OP
super stock
Joined: Jun 2007
Posts: 1,167
clarks summit pa
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Has anybody done a comparison between 3.54 and 3.73 gears in the 1/4? I'm getting a new Dana 60 for my cuda but I'm unsure about which ratio to go with. Car is street/ strip but no highway driving, just around town and back roads. Car has 528 Hemi with a 4 speed and 295/55/15s.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: 3.54 vs 3.73 performance difference
[Re: 73cuda340]
#2648600
04/24/19 08:26 PM
04/24/19 08:26 PM
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Joined: Dec 2006
Posts: 2,094 Byron, NY
W.I.N. Racing
top fuel
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top fuel
Joined: Dec 2006
Posts: 2,094
Byron, NY
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not enough to notice on the street
'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60 '01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust, '05 Dodge Magnum R/T - Too Much to list '60 Willys CJ5 '01 International LPX - Project,DT466, Allison '64 Plymouth Valiant, Inj 528 Hemi, 2spd
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Re: 3.54 vs 3.73 performance difference
[Re: 73cuda340]
#2648648
04/24/19 10:18 PM
04/24/19 10:18 PM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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If it was me I would buy the 3:73 for the stick tranny, 3:54 for a 727 is your tranny a NP833 standard ratio, non O.D.,or which tranny are you using and what is the first gear ratio?
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 3.54 vs 3.73 performance difference
[Re: Cab_Burge]
#2648699
04/25/19 08:06 AM
04/25/19 08:06 AM
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Joined: Jan 2003
Posts: 13,318 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,318
Marion, South Carolina [><]
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Not enough to notice. I'd probably go with the 3.73 though.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: 3.54 vs 3.73 performance difference
[Re: 73cuda340]
#2648743
04/25/19 10:06 AM
04/25/19 10:06 AM
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Joined: Jan 2003
Posts: 14,478 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,478
So. Burlington, Vt.
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No highway use, street/strip........
If the ET is a factor in deciding on which gears, I’d probably go 4.10’s with a stick.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 3.54 vs 3.73 performance difference
[Re: fast68plymouth]
#2648791
04/25/19 11:31 AM
04/25/19 11:31 AM
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Joined: Feb 2006
Posts: 604 TN
1DGEMAN
mopar
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mopar
Joined: Feb 2006
Posts: 604
TN
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Since you are just putting around back roads and no freeway driving put the gears in it that work the best for the strip. At least 4.10's
Real Men shift for themselves
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Re: 3.54 vs 3.73 performance difference
[Re: second 70]
#2648827
04/25/19 12:25 PM
04/25/19 12:25 PM
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Joined: Jun 2007
Posts: 1,167 clarks summit pa
73cuda340
OP
super stock
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OP
super stock
Joined: Jun 2007
Posts: 1,167
clarks summit pa
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My car has a 71 18 spline hemi 4 speed which should be a 2.44 first gear.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: 3.54 vs 3.73 performance difference
[Re: 73cuda340]
#2648843
04/25/19 12:51 PM
04/25/19 12:51 PM
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Joined: Jul 2005
Posts: 635 Graz, Austria
DGS
mopar
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mopar
Joined: Jul 2005
Posts: 635
Graz, Austria
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My car has a 71 18 spline hemi 4 speed which should be a 2.44 first gear. I would go with the 3.73 then. Starting line ratio is about 9.1 vs. 8.6 with the 3.54 gears.
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Re: 3.54 vs 3.73 performance difference
[Re: 73cuda340]
#2649005
04/25/19 08:29 PM
04/25/19 08:29 PM
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Joined: Feb 2005
Posts: 4,309 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,309
Prospect, PA
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Has anybody done a comparison between 3.54 and 3.73 gears in the 1/4? .........Car has 528 Hemi with a 4 speed and 295/55/15s. No, I have not done a comparison. In your question above, will the car have street tires, or slicks? Generally, from my experience, traction limited cars (i.e. street tires at the track) usually show little change in ET because the benefit of the higher gear is lost in the lack of improvement in 60 ft due to the traction limitation of the tire. But if the car will never be on the highway, why would you not go with the higher gear ratio. It will be more fun to drive.
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Re: 3.54 vs 3.73 performance difference
[Re: Cab_Burge]
#2649571
04/27/19 03:41 PM
04/27/19 03:41 PM
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Joined: Jun 2007
Posts: 1,167 clarks summit pa
73cuda340
OP
super stock
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OP
super stock
Joined: Jun 2007
Posts: 1,167
clarks summit pa
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I thought all the 18 spline hemi tranny had either the 2.65(red stripe?) or 2.66 (blue stripe?)first gear ratio, no close ratio like in the 1970 23 spline AAR and T/A and in the 1971 and later 23 spline tranny in production vehicles I could be wrong, but I read that 70 and earlier hemi 4 speeds had the 2.65 and the 71 had the other.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: 3.54 vs 3.73 performance difference
[Re: BSB67]
#2649811
04/28/19 10:21 AM
04/28/19 10:21 AM
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Joined: Jun 2007
Posts: 1,167 clarks summit pa
73cuda340
OP
super stock
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OP
super stock
Joined: Jun 2007
Posts: 1,167
clarks summit pa
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Has anybody done a comparison between 3.54 and 3.73 gears in the 1/4? .........Car has 528 Hemi with a 4 speed and 295/55/15s. No, I have not done a comparison. In your question above, will the car have street tires, or slicks? Generally, from my experience, traction limited cars (i.e. street tires at the track) usually show little change in ET because the benefit of the higher gear is lost in the lack of improvement in 60 ft due to the traction limitation of the tire. But if the car will never be on the highway, why would you not go with the higher gear ratio. It will be more fun to drive. The car has drag radials on it.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: 3.54 vs 3.73 performance difference
[Re: 73cuda340]
#2649878
04/28/19 01:06 PM
04/28/19 01:06 PM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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I thought all the 18 spline hemi tranny had either the 2.65(red stripe?) or 2.66 (blue stripe?)first gear ratio, no close ratio like in the 1970 23 spline AAR and T/A and in the 1971 and later 23 spline tranny in production vehicles I could be wrong, but I read that 70 and earlier hemi 4 speeds had the 2.65 and the 71 had the other. Mopar added the close ratio to the 23 spline trannys in 1970 on the AAR and T/A cars, they then drop the 2.66,265, ratio in the 23 spline tranny only (is what I'm under the impression) and put the close ratio trannys in all the 1971 4 speed cars except the Hemi and 440 HP cars I've never had a 1971 hemi or 440 18 spline tranny to check the first gear ratio, maybe some one here who has one can chime in
Last edited by Cab_Burge; 04/28/19 01:08 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 3.54 vs 3.73 performance difference
[Re: 73cuda340]
#2649882
04/28/19 01:14 PM
04/28/19 01:14 PM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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Has anybody done a comparison between 3.54 and 3.73 gears in the 1/4? I'm getting a new Dana 60 for my cuda but I'm unsure about which ratio to go with. Car is street/ strip but no highway driving, just around town and back roads. Car has 528 Hemi with a 4 speed and 295/55/15s. Welcome to the slippery slope! I originally just wanted a good 4-barrel on my 383 Satellite..... haha.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: 3.54 vs 3.73 performance difference
[Re: Cab_Burge]
#2650246
04/29/19 03:17 PM
04/29/19 03:17 PM
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Joined: Dec 2009
Posts: 339 Gilroy,CA.
mopardude318
enthusiast
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enthusiast
Joined: Dec 2009
Posts: 339
Gilroy,CA.
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This leads me to a question, I currently have 3.73s in a Dana 60, would the jump to 4.10s be substantial? Currently have an OD trans.
408 Stroker 533 HP 520 FT LBS...........................1970 Dart RMS AlterKation
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