Anyone have their diff rebuilt? I am curious as to the price. I'd replace it but I have a 4.31 and it wasnt shimmed right I think.

 

actually it is the rear end that needs the rebuild... not the actually diff. anyone know a good source besides mazda/mazdacomp for bearings and which bearings I should buy ahead of time...

 

I'm interested in seeing your responses as I'm sitting on a destroyed diff too.....

As far as parts, I think your 2 best bets are Mazdacomp and Malloy Mazda.

 

what is wrong with it ?

i blew one diff it exploded all the gears on the torsen. if you did that you need buy a whole new diff

 

I just need new bearings... its whining

 

I installed a set of 4:11's on my 69 Camaro when I was pretty young. I didn't shim them right and ruined them. They could hear me coming a mile away (whining). I bought another set and had a shop put them in.

Once they start whining, irreversable damage is being done. You might (hopefully not) need to replace the gears. Have you had a mechanic look at it??

 

nope, not yet. I havent even pulled it yet.

 

i am running stock 4.10 gears . never had a problem with them...

 

I would take it straight to a shop and have them look at it. HOPEfully they just need to be shimmed properly, and not to much damage has been done. Good Luck!!

 

vosko:

Are you running 4.10's on your FD? If so, what rpm do you mark at 70mph (highway driving). Thanks.

 

right, well that leads me back to the point of the post... how much it will cost me

 

Wish I knew the cost. Best bet is to just call a shop for an estimate.

 

I'll probably do it myself anyway. I'll just call mazda and see what they quote for parts.

 

How did the car perform with the 4.31's?? How high were the rpm's at highway speeds?. I was thinking of changing my 3.90 gears and going with a lower gear ratio. It should improve my 1/4 time.

 

I dont know. I bought the car with the 4.31 and it whined when I got it too.

 

65mph is around 2500rpm BUT i am running much bigger rear tires. 275/40/17 so my speedometer is probably off 2-5 mph

 

Mine is in the neighborhood of 3000rpm, +/-100rpm...I think

 

oops 2500rpm is 60MPH.... 65 is like 2700 rpm like ISU said... oops

 

I tested it tonight.
70mph indicated is around 2700rpm, although I am pretty sure that my speedo reads about 5mph at that speed.

 

So what are you guys running in the 1/4 mile??

 

18 seconds

 

it was 12.1 before I swapped it to a manual and stuff

 

you ran 12.1 in an automatic ?

 

damn........ i though my 22.9 was respectable.

 

what can i say. i shift mad quick!