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lower rpm for efficiency or higher RPM for power?  

  1. 1. lower rpm for efficiency or higher RPM for power?



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Posted

My Question is to ask if anyone knows how to determine what ratios a 4t60 or 4t60e tranmission has, if they are indicated on the tranmission plate or spid?

The reason i ask is that my:

91 Lumina Euro ran 2000 rpm at 60 mph (god rest it's hulk)

92 Lumina Sedan runs 2000 rpm at 72 mph(w Euro cluster)

94 CS S runs 2000 rpm at 72mph 4t60e

95 CS SL runs 2000 at 60 mph. 4t60e

 

And needing a transmission for a 91 CS... I'd like to get the higher drive ratio 4t60 tranny from a junk car, (with no way to test drive):?

 

I want the more efficient one, but also have no way to determine the deceased tranny's ratio

Posted

Hey, I reviewed those once before, but I read them this time and discover:

F16 : RATIO, TRANSAXLE FINAL DRIVE 2.53

F17 : RATIO, TRANSAXLE FINAL DRIVE 2.84

F25 : RATIO, TRANSAXLE FINAL DRIVE 3.32

F29 : RATIO, TRANSAXLE FINAL DRIVE 2.82

F47 : AXLE FRONT, 2 73 RATIO

F62 : RATIO TRANSAXLE FINAL DRIVE 2.39

F67 : RATIO, TRANSAXLE FINAL DRIVE 3.19

F68 : RATIO, TRANSAXLE FINAL DRIVE 3.45

F75 : RATIO, TRANSAXLE FINAL DRIVE 3.18

F77 : RATIO, TRANSAXLE FINAL DRIVE 3.73

F79 : RATIO, TRANSAXLE FINAL DRIVE 2.97

FP0 : RATIO, TRANSAXLE FINAL DRIVE 2.55

FP1 : RATIO, TRANSAXLE FINAL DRIVE 2.72

FP2 : RATIO, TRANSAXLE FINAL DRIVE 3.58

FP3 : RATIO, TRANSAXLE FINAL DRIVE 2.73

FP5 : RATIO, TRANSAXLE FINAL DRIVE 2.95

FP6 : RATIO, TRANSAXLE FINAL DRIVE 3.54

FP7 : RATIO, TRANSAXLE FINAL DRIVE 3.73

FP8 : RATIO, TRANSAXLE FINAL DRIVE 3.54

FQ1 : AXLE FRONT, STD RATIO

FQ2 : RATIO, TRANSAXLE FINAL DRIVE 3.48

FQ6 : RATIO, TRANSAXLE FINAL DRIVE 4.12

FQ8 : RATIO, TRANSAXLE FINAL DRIVE 2.96

FQ9 : RATIO, TRANSAXLE FINAL DRIVE 3.21

FV0 : RATIO, TRANSAXLE FINAL DRIVE 3.67

FV1 : RATIO, TRANSAXLE FINAL DRIVE 3.72

FV3 : RATIO, TRANSAXLE FINAL DRIVE 3.11

FV4 : RATIO, TRANSAXLE FINAL DRIVE 3.71

FVO : RATIO, TRANSAXLE FINAL DRIVE 3.67

FW2 : RATIO, TRANSAXLE FINAL DRIVE 3.06

FW3 : RATIO, TRANSAXLE FINAL DRIVE 4.02

FW4 : RATIO, TRANSAXLE FINAL DRIVE 3.89

FW5 : RATIO, TRANSAXLE FINAL DRIVE 4.10

FW6 : RATIO, TRANSAXLE FINAL DRIVE 3.42

FW7 : RATIO, TRANSAXLE FINAL DRIVE 3.83

FW8 : RATIO, TRANSAXLE FINAL DRIVE 4.28

FW9 : RATIO, TRANSAXLE FINAL DRIVE 3.43

FWS : RATIO, TRANSAXLE FINAL DRIVE 4.10

FX1 : RATIO, TRANSAXLE FINAL DRIVE 3.94

FX2 : RATIO, TRANSAXLE FINAL DRIVE 2.66

FX4 : RATIO, TRANSAXLE FINAL DRIVE 3.35

FX8 : RATIO, TRANSAXLE FINAL DRIVE 3.61

FY1 : RATIO, TRANSAXLE FINAL DRIVE 2.36

FY3 : RATIO, TRANSAXLE FINAL DRIVE 3.79

FY5 : RATIO, TRANSAXLE FINAL DRIVE 3 52

GX3 : RATIO,TRANSAXLE FINAL DRIVE 3.33

GYS : RATIO TRANSAXLE FINAL DRIVE 3.65

 

thats what I'm hoping for! Kick asss! however...... If i go to the boneyard and they have loose tranies....... does anyone know if the metal tag on the trannywould tell you on it too?

-ken

Sadly most of my spid are absent, time to contact gm for those

Posted

Don't bother contacting GM about your SPID, just go to your local dealer and they'll print you off a detailed sheet for free.

Posted

I'll bet plenty of cash that all 4 of your cars have a 3.33 axle ratio (what all 4T60/60-E LHO's and L82's got).....................

 

The rpm differences are probably due to differences in the state of TC lockup.

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