reaer diff whats the differance

[mercuryfreak200]

ok my car is a 88 turbo i found a n/a diff for 50 bucks and i was wondering if i could use that to get me by until i could afford to buy the turbo one i know the ratios are differant but will the rpms be faster or slower with the n/a and will there be a preformance change. or will the turbo motor just tear it up in a heart beat and i'll be sunk.???

 

[Kevin]

the n/a have a 4.30
the turbo is 3.91 for pre 89 and 3.73 for post 89

meaning your engine will be revving higher with the n/a at the same speed as a turbo diff hopefully that made sense

 

[mercuryfreak200]

yes it did the diff is out of a 90 n/a is the ratio still the same as pre 89 for the n/a. and its not like its going to be racing at like 6000 rpms at 35 mph is it?

 

[Kevin]

its not gonna be that dramatic. its gonna be a bit higher. if you search i remember seeing a thread with these things calculated already

 

[deabionni]

I'm still running the N/A diff in my GTE swapped Supra, and I run around 2600 RPM at 60 MPH.

 

[mercuryfreak200]

ok thanks

 

[ForcedTorque]

You may notice the difference at the gas pump

 

[mercuryfreak200]

my gauge doesn't work i think its from sitting since 2002 i just bought this car rebuilt the motor and found out the rear diff was bad but at least the idiot indicator works so i know when i need gas also it bucks real bad when its low on gas whats up with that??

 

[Kevin]

my gauge doesn't work i think its from sitting since 2002 i just bought this car rebuilt the motor and found out the rear diff was bad but at least the idiot indicator works so i know when i need gas also it bucks real bad when its low on gas whats up with that??

i think you should start a new thread for that, so other people (me) can benefit from the search

 

[BrandonW]

found this, maybe it will supply more info for you and others
http://www.supramania.com/forums/showthread.php?105328-Quick-newber-question-on-the-different-differentals&p=1401224&viewfull=1#post1401224

Let me answer that question for you.

USA/Canada Destination:
86.5 - 92 N/A = 4.30:1 (USA: LSD Optional, Canada: LSD Standard) (Open Axle Code: G284; LSD Axle Code: G285)
87-88 Turbo = 3.91:1 LSD Standard (Axle Code G315)
89-92 Turbo = 3.73:1 LSD Standard (Axle Code G305)

Japan JZA70:
1JZ-GTE Automatic = 3.91:1 (Torsen LSD Optional) (Open Axle Code: G314; LSD Axle Code: G319)
1JZ-GTE Manual = 4.10:1 (Torsen LSD Optional) (Open Axle Code: G294; LSD Axle Code: G299)

Jeff

 

[mercuryfreak200]

ok kevin but which part the gauge or the bucking???

 

[mercuryfreak200]

how hard is it to change the diff out

 

[ForcedTorque]

The bucking is probably due to trash in the tank.

The hardest part of changing the diff, is getting the axles off, after the nuts are taken off. They like to hang on, and can be a slight pain in the ass. Other than that, it's nuts, bolts and weight. A jack will help with the weight.

 

[Kevin]

the gauge.. but maybe there's another thread on here. didnt search hard yet