I have an 88 iroc 5.7
I want to know if anyone else has this special order rear end.
If so, did you have problems getting gears? I was planning to switch to 3.73 Richmond. That is not going to work.
Also if anyone has any general info on this rear... please share.

Thanks

 

re: australian 9 bolt diffs.

Basically what you have is a Borg Warner posi with a really odd configuration that was used in cars with discs (unless you special ordered a dana 44). I believe there were only 2 gear sets available; 2.77 and 3.27 and if you want to swap out, you need to have the three series carrier. I don't recall manufacturer (richmond??) but definitely pricey, in the 7-800 dollar range .

_________________________________

 

You wanna talk to Miles...he's a good guy.

http://www.difftechnics.com/9_bolt_home.html

 

My Borg Warner posi has 3.45's out back..stock.

 

3.45's came only in the 305 5 speed cars. All 5.7's got either the 3.27 (like mine) or the 2.77.

Bob

 

Thanks...I am going to talk to Pete at High-Tech Racing tonight. I have heard the gears will cost me around $800..more than double the price of the Richmond's ..do u guys think it is worth doing?

 

I've heard they are around $600, but I don't know if that includes the kit. What type of mods do you have? You'll want enough engine for those gears.

Hey Chris. Where is Difftechnics out of? The US.?

 

Hey man.
Try a place called Driveline 2000. They are in Scarborough. I talked to him on the phone and he was extremelly helpful. I've heard mixed things about Hytech.

 

i have a list of sorts
MSD- 6AL Ignition ,wires, cap
Air foil
K&N air filters
Headers-Edelbrock
Complete exhaust- Flowmaster- free flow cat
Custom chip
Pro Magnum roller rockers 1.6 Ratio
Cross drilled rotors disks on 4
Pan hard rod...lower control arms...sub- frame cons -all custom
Eibach springs- new shocks/struts
2600 stall- custom
B&M shifter with shift kit

I think that is pretty much it. i have never actually made a list. Hard to keep track.
Oh, please don't call me Man. Girls don't like that
Opinions greatly appreciated

 

ooops, sorry about that!

 

that's cool. I guess everybody just assumes I am a guy. It looks like most people on the board are.

 

You should be ok for those gears. I'm hoping to install a set this winter, but I haven't decided on the ratio yet. Have you tried the car at the drag strip? It would be interesting to see what the difference is.