N/A Diff question

[slightly_red_MA70]

So on my 88 N/A i have the 4.30 LSD rear end, it is toast(LSD is now open diff) i am going to be buying a new diff today, it is the 3.91 LSD.

My question is, will this still be okay? I know it will probably get rid of a bit of accel and give me more top speed but, Im just wondering if the 7mge and w58 will be able to cope with the diff?

 

[RedGT]

You should be ok, The car may bog more taking off than before and you will see a gas milage change, probably for the worse. maybe -1 mpg? Low horsepower cars usualy have higher gear ratios to get the car in a more suitible powerband. Put it in and if you dont like how it feels then swap it out again.

 

[gofastgeorge]

I doubt if you will see more top end.
You need big HP to pull taller gears, and a GE just does not have it.
And +1 for maybe worse mileage. (for the same reason)

 

[slightly_red_MA70]

Im not too worried about the gas milage lol
This is also planning ahead as im throwing a gte in the car in a month or two.
Thanks guys!

 

[Moy]

Your speedometer will also read faster than you're actually going

 

[Fuzz420]

Your speedo will be off. If you search around you can find the difference in speed that some members layed out in a nice chart.I run a 3.7 with a w-58 and i was going a little faster than usual when driving like it i had a 4.3 in the back.

 

[slightly_red_MA70]

Well, I got the diff in. took about an hour and a half to do it on my own.

Doesn't seem bogged down at all, I'm still able to spin the tires and drift in 2nd gear, speedo is only off by a bit. There is no more shaking car when i let off of the throttle at over 100km/h(thank god! that was getting scary!!)

All is good, no leaks. Guy i bought it off says it was basicly just rebuilt and I checked the fluid...brand new! :-D