Rear-end going out how long will it last? swap ?'s??

[Jacob_Royer]

Ok when i bought the stang the u-joints were shot and probably due to its death wobble the dam rear-end started leaking badly at the pinion seal.. Well i started noticing chattering when id take off and going around corners with my foot in it a bit.. stupid oil has a crapload of shavings in it! talked to a few ppl they all say get a junk yard unit and scrap it.. What im wondering is will i get any warning before it goes south the rest of the way?? i really dont want to have to dd my truck with gas so high.. but i dont want to get stranded eaither.. Also do auto rear-ends have lower gears?? if so wouldnt they be a good swap without getting ass gas mileage? i need the best i can get because my other car uses premium and gets 20mpg at best.. and my truck 16/17 at best.. mustang averages 25/26mpg.. Ive also noticed a recent loss in power and really wonder if the stinking rear-end is holding me back..

 

[40th GT]

No you won't get any warning. Not to scare you but it will probably seize and lock up your rear wheels while driving down the road.
As far as ratios go, that depends on whether the donor car had the optional 3.27s or the standard 2.73s.

Good Luck.

 

[Jacob_Royer]

are 3.27s standard for auto's and 2.73's for manuals?? also would jumping up to 3.27s kill my mileage or be about the same with a tad more performance? I found a used unit from a 94 for $400 did all the gts have 8.8's they always ask when you call if its an 8.8 or 7.5... what would be the ratio on a 94 gt rear-end? it seems 5.0's were geared a bit higher?

 

[40th GT]

The final gear ratio is not relevant to the type of transmission. So you could have an auto w/ 2.73s and vice versa. Plus I just found out that there was also an option for 3.08s.

But no matter what, gas mileage won't really be affected, maybe 1 or 2 mpg on the highway, if that. Lower ratios (numerically higher) can actually help mileage around town, b/c you won't have to open the throttle as much to accelerate.

 

[Jacob_Royer]

Well i wondered because my t-bird came with 3.27's and the 5speed's were 2.72's i figured an auto stang's rear-end probably hadnt been beat on as much and would be geared a bit lower?

 

[Jacob_Royer]

a 94 wouldnt have higher gears would it?? I dont want to make a step backword so how can you tell the ratios apart?

 

[d98gt]

I know that the autos in 96-98 have the 3.08s in them.

You probably need to take a day and attempt to reveal all damage. It might not be too terribly serious.