: 25873498 Diff into a '05



Gus_Mahn
05-09-10, 11:04 AM
25873498 should be a stock replacement for the original 3.73 diff in my '05, right? My dealer is rebuilding my original diff, and saying there are no complete diffs. to install into my car going by my VIN and GM's parts system. I know my car is driven hard enough it will start to whine again, so I want the stronger revised diff. It would be outstanding if someone could provide me with a invoice showing a 25873498 diff. assembly being installed into a '04 '05 under warranty or GMPP.

nickr28784
05-09-10, 02:05 PM
pics in here.... http://www.cadillacforums.com/forums/2004-2007-cadillac-cts-v-general/198651-good-news-bad-news.html

Gus_Mahn
05-09-10, 02:47 PM
Thank You! Would you happen to have a clearer copy which you could e-mail to me?

rjoffe
05-09-10, 04:43 PM
Gus,

If you don't get one from above, I can probably dig mine up, it was done recently on my '04.

Ron

Gus_Mahn
05-10-10, 10:31 PM
Game over. They rebuilt my original diff:banghead: They said that my VIN didn't show the 25873498 for my car unless they turned off the VIN filter in their system. Some must? I guess I'll just install my DSS axle and see what happens. I'll buy a 25873498 on my own dime if I need to down the road:bomb:

CadzillaTN
05-10-10, 11:54 PM
game isnt over yet, i believe warranty repairs are good for 1 year. i wouldnt go sidesteppin it, but if she sh*ts on you at a stoplight you may have a case for the new diff...

AAIIIC
05-19-10, 04:17 PM
Game over. They rebuilt my original diff:banghead:
Interesting. I was just told by Lindsay that they can't rebuild the diff, it only comes as a complete assembly (case and all). I'm not complaining, as I believe that means I'm getting the newer style, but it still seems strange to me.

rangerrob
05-19-10, 04:33 PM
Gus Mahn, PM me, where'd you take it to get done? I just had that new case thrown in mine 2 days ago.

JDB
05-19-10, 10:30 PM
I just had mine replaced last week in my '05 with 25873498 diff under CPO.

My dealer claimed there is no need for the limited slip additive -- that it was a fix for the prior versions.

rand49er
05-19-10, 10:48 PM
Some dealers seem to want to go that extra distance for the customer no matter what.

Others seem to just make it up as they go along.

Weird. :helpless:

Gus_Mahn
05-20-10, 12:24 AM
I just had mine replaced last week in my '05 with 25873498 diff under CPO.
Yep, I've read of no one whose had their original rebuilt. Obviously I'm going to go through these issues again, but on my own dime:rant2:


Some dealers seem to want to go that extra distance for the customer no matter what.

Others seem to just make it up as they go along.

Weird. :helpless:I can't figure out why they fixed my car this way. Were they just trying to bring in labor at my future expense? I did get a form e-mail from the service manager. I sent a three paragraph response. No reply yet. I'm thinking of calling him. If nothing else, I expect them to sell me a 25873498 for little/no profit.

Max-Q
05-21-10, 04:57 PM
Game over. They rebuilt my original diff:banghead: They said that my VIN didn't show the 25873498 for my car unless they turned off the VIN filter in their system. Some must? I guess I'll just install my DSS axle and see what happens. I'll buy a 25873498 on my own dime if I need to down the road:bomb:

I'll check the numbers on my spare diff. I'm planning on selling it after I sell my maggie'd V. I know it's newer than my 04 diff which is still going strong after all these years.

JimmyH
05-21-10, 05:32 PM
My dealer claimed there is no need for the limited slip additive -- that it was a fix for the prior versions.

I find that hard to believe. Unless the diff fluid they use already has limited slip additive, or is limited slip compatible.



as for rebuilding diffs, I can't believe they would do that either. I would think it cheaper to replace the entire carrier than try to rebuild it. and if there is distortion in the carrier itself...

darkman
05-21-10, 07:55 PM
I just had mine replaced last week in my '05 with 25873498 diff under CPO.

My dealer claimed there is no need for the limited slip additive -- that it was a fix for the prior versions.

I am skeptical about this like Jimmy - The additive for the limited slip was never a fix for any version of the differential - it was rather, a fix for the friction coeefficient of the GM differential fluid. All limited slip clutches must have the right friction coefficient and some fluids come with it and other fluids don't.

3Fletch
05-22-10, 11:36 AM
I just had mine replaced with the newest version under warranty and now have a spare that I bought as a backup for sale on Ebay...

#15793756

under 23K miles on it

Just in case someone need a back up or replacement.

KaMaSuTrA
05-30-10, 01:20 PM
That's some shady bull right there.

trhs75
05-30-10, 11:59 PM
I've got an 05 with 33,000 miles and one more year of bumper-to-bumper warranty. If the diff is going to go, I want it to go during the next year (of course). It seems fine, but are there early signs of failure I should watch for?

JimmyH
06-01-10, 04:35 PM
signs of catastrophic failure? None.

If it starts to whine, that could mean it will blow up next week, or in two years.