automatic rpms

[suprahero]

can any of the automatic supras please tell me how many rpm's they are turning at 80 mph? i think that i am turning too many rpms. i put a new gear shifter on and i dont think that my overdrive is on.thanks for any help.

 

[Suprastic]

If the overdrive isn't on it will rev way too high. with my over drive on I think I'm around 3000-3500

 

[modnar]

With overdrive on in flat terrain; right at 3000rpm.


modnar

 

[mrnickleye]

OD on @ 80mph=3k on the tach. OD off = like 4k cause the lockup torque converter is not on either.:icon_conf

 

[SupraMario]

just kinda OT, but would a manual have a different RPM range than an auto?
cause at 80 in 5th/OD im at 3500 not 3k.

srry bout the highjack.

 

[suprahero]

thanks guys i guess my od is on because i am running around 3k. thanks for the help.

 

[Suprastic]

yeah it does. manuals always seem to rev about 500rpm's higher than an auto. especially at cruising speeds.

 

[bdashrad]

of course they are different, they are different ratios.

 

[tlo86]

it will have a light saying "O/D OFF"

 

[jaydm16]

make sure you're comparing cars with the same rear differential ratios.

 

[mrnickleye]

Me bad....lock-up converter will function in 3rd gear with OD button off.
http://www.cygnusx1.net/supra/library/TSRM/a/A_22.html

The n/a axle ratio is 4.33 & the turbo is 3.9 (?)....so the speeds will be different at 3k rpm.

 

[Jeff Lange]

N/A is 4.30:1, 87-88 Turbo is 3.91:1, 89-92 Turbo is 3.73:1.

Auto, N/A Manual, and Turbo Manual trannies all have different gear ratios for each gear too.