rsiwicki- 4.08 differential

[heywier427]

please tell how you got the 4.08 into the Q. what is it from what mods were made. i cant get a clear cut answer from anyone...please email.

thanks

[elwesso]

Its all covered in the previous posts!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

he had his diff rebuilt custom... not an easy job and probably not something he would even recommend doing!!!!!!!

PLEASE consider reading archived and current threads, its ALL there.

[heywier427]

sorry didnt archive...wes any help on the mirror wire for me?

[elwesso]

THANK you for reminding me, i was actually opening up the FSM when my computer took a crap on me.....

Heres the diagram... Should be what you need...

[rsiwicki]

yeah as Wes said....I would recommend other mods first before doing the 4.08 due to the cost and difficulty. In short, you have to find a damn good driveline shop that would even consider what you want to do then locate a pumpkin just incase $hit happens like blowing up your rearend (and it does just look at my pic gallery) and then pay $700 in new parts from Joe for all NA 300ZX 4.08 internals and then do a little dance, go to church and pray that is all works. If you are lucky on the first shot, it will cost you at least $1,200 when all is said and done. It does make the car more fun around town....but if I had to do it all over again I would have probably spent the monies partying my butt off in the Bahamas for a week. Much more return of pleasure for my monies

[Q45tech]

The problem is the 4 speed gear span it was optimized for MPG [55-60 mph] in 4th gear with 3.538 and Q weight.

To match a new M45 in 1st gear the 4.083 falls way short a ~~4.50-4.60 is required.

A 90-93 Q has a 9.85 total gear multiplication at launch. 11.367 for a 4.083IDEALLY a 12.5-13:1 will give the best launch and acceleration in 1st gear.

[heywier427]

thanks for the replies. Wes your the greatest!