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diff needs a rebuild

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Old 08-21-03, 10:07 PM
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diff needs a rebuild
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.
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Old 08-22-03, 12:40 AM
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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...
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Old 08-22-03, 08:22 AM
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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.
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Old 08-22-03, 09:54 AM
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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
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Old 08-22-03, 10:46 AM
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I just need new bearings... its whining
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Old 08-22-03, 11:42 AM
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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??
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Old 08-22-03, 12:05 PM
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nope, not yet. I havent even pulled it yet.
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Old 08-22-03, 12:14 PM
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i am running stock 4.10 gears . never had a problem with them...
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Old 08-22-03, 12:29 PM
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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!!
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Old 08-22-03, 12:33 PM
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vosko:

Are you running 4.10's on your FD? If so, what rpm do you mark at 70mph (highway driving). Thanks.
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Old 08-22-03, 12:50 PM
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right, well that leads me back to the point of the post... how much it will cost me
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Old 08-22-03, 01:01 PM
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Wish I knew the cost. Best bet is to just call a shop for an estimate.
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Old 08-22-03, 01:07 PM
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I'll probably do it myself anyway. I'll just call mazda and see what they quote for parts.
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Old 08-22-03, 01:54 PM
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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.
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Old 08-22-03, 02:33 PM
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I dont know. I bought the car with the 4.31 and it whined when I got it too.
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Old 08-22-03, 03:17 PM
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Originally posted by areXseven
vosko:

Are you running 4.10's on your FD? If so, what rpm do you mark at 70mph (highway driving). Thanks.
65mph is around 2500rpm BUT i am running much bigger rear tires. 275/40/17 so my speedometer is probably off 2-5 mph
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Old 08-22-03, 03:18 PM
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Originally posted by areXseven
vosko:

Are you running 4.10's on your FD? If so, what rpm do you mark at 70mph (highway driving). Thanks.
Mine is in the neighborhood of 3000rpm, +/-100rpm...I think
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Old 08-22-03, 04:10 PM
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oops 2500rpm is 60MPH.... 65 is like 2700 rpm like ISU said... oops
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Old 08-22-03, 10:02 PM
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I tested it tonight.
70mph indicated is around 2700rpm, although I am pretty sure that my speedo reads about 5mph at that speed.
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Old 08-23-03, 07:52 AM
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So what are you guys running in the 1/4 mile??
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Old 08-23-03, 09:07 AM
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18 seconds
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Old 08-23-03, 10:29 AM
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it was 12.1 before I swapped it to a manual and stuff
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Old 08-23-03, 10:40 AM
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you ran 12.1 in an automatic ?
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Old 08-23-03, 10:44 AM
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Originally posted by vosko
18 seconds
damn........ i though my 22.9 was respectable.
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Old 08-23-03, 10:46 AM
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Originally posted by Resource
damn........ i though my 22.9 was respectable.
what can i say. i shift mad quick!
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