rear dif. question

[JDM 1JZ]

what year did the 3.71 come in, is there even a such thing. i thought the turbos had 3.73 and the NA were 4.30 are with or without lsd.

anyway i searched, and couldnt come up with anything for years for the rear dif. gearing. whats years came with what and what models!

thanks

 

[pimptrizkit]

89+ turbo

 

[Wills7MGTE]

I got a 90 with the LSD so I guess I have one? is the 3.71 good?

 

[aye mate]

Ok I searched but couldn't find it. I know there is a list of what diff. came in which cars. Off the top of my head I think it is:

Base model NA's, open 4.30
Sport Model NA's LSD 4.30
87-88 Turbo's 5spd, 3.91 LSD
87-88 Turbo AT, 3.73 LSD
89+ Turbo AT and 5spd 3.73

No such thing as a 3.71

 

[pimptrizkit]

gives you a better highway mpg, some times worse city depending on how hard you are on the gas, not the perfect drag ratio,

i swaped a 3.91 in out of a 88turbo i was running a 4.30 and found first and second went by pretty quick,

im pretty happy with the gears i choose, but do wish atsome time to swap and try the others out.

eh there's little difference between .01 & .03 diff of .02... 2cents any one?

 

[JDM 1JZ]

hmm interesting, so with a 4.30 lsd swap what are cruising speeds like on the highway in comparison to the .73, .91,.30?

 

[bowsercake]

with the 4.3 NA LSD you will probably be sitting at 4000 at 70mph atleast ( I guess). The 4.3 on a turbo is not for gas mileage, its for racing.

 

[IJ.]

Wouldn't want that front diff ratio in there!!

4.3+ R154 5th = 3200rpm @ 70mph

 

[born2drv]

yes i was going to go with a 4.30 but i decided to stick with my 3.91 since i didn't want highway speeds to be well over 3krpm

 

[Big Wang Bandit]

I hate 4.3 gears