DTE/RPM Diff or OEM Z06 diff
Thread Starter
Heel & Toe
Joined: Aug 2006
Posts: 24
Likes: 0
From: Maplewood MN
DTE/RPM Diff or OEM Z06 diff
I have searched the forms and could not find this question addressed.
Do I go with a DTE or RPM differential (3.42 gears)or order an OEM Z06 differential form GM Parts House?
They are both about the same price, with the OEM route I would be able to keep my original (2.73) diff.
I am also going to add a mild stall.
Thanks in advance.
Do I go with a DTE or RPM differential (3.42 gears)or order an OEM Z06 differential form GM Parts House?
They are both about the same price, with the OEM route I would be able to keep my original (2.73) diff.
I am also going to add a mild stall.
Thanks in advance.
Safety Car
Joined: Mar 2006
Posts: 4,448
Likes: 4
From: Sarasota Florida
St. Jude Donor '06
If you're going to buy the "base" aftermarket diff (which is what's about the same price as a new Z06 unit) it's not getting you all that much over the factory diff. Maybe better assembly and a better LH shaft. And that's "costing" you the $700 core value of your existing diff, over and above the diff price. Plus the late '04 units have a better case. If it were me I'd either step up to a Stage 2 or 3 aftermarket unit or take the new Z06 unit. Unless you're going to make some really serious power, the Z06 unit should be plenty strong enough behind an automatic.
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
Rodney at RPM did my 3.90 rear about 2 years ago as a favor. I understand he has recently started doing them for the general public again. You won't find a better person than Rodney to deal with - and a great product. I've beaten my differential hard and it is still whisper quiet with no noise at all. 
Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
Safety Car
Joined: Jul 2005
Posts: 4,205
Likes: 2
From: Chicago-NW Burbs Illinois
Rodney at RPM did my 3.90 rear about 2 years ago as a favor. I understand he has recently started doing them for the general public again. You won't find a better person than Rodney to deal with - and a great product. I've beaten my differential hard and it is still whisper quiet with no noise at all.
Same here. I had Rodney do my 3:73 rear and it's lived through many 1.6 60" at the track and hard launches all summer. No noise or anything. Very happy with it. Great customer service as well. I'm going to buy a tranny (level V) from them this spring as well. Good luck with your choice I'm sure you can't go wrong either way.
Pro
Joined: Nov 2003
Posts: 598
Likes: 1
From: Vinton VA
As far as I'm concerned, there's no choice but RPM !!!!! They have done all my transmission/rear end work with outstanding results. My car is no where near stock, and RPM is the only shop I've found that's been able to build something that has been able to stand up to my ECS Supercharged 427.
RPM is a shop where you feel that you've gotten MORE than your money's worth. That my friend is a rare thing in this day and time.
RPM is a shop where you feel that you've gotten MORE than your money's worth. That my friend is a rare thing in this day and time.
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