9 bolt rebuild

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9 bolt rebuild

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9 bolt rebuild - 9/24/2008 9:10:27 PM

350rs

Posts: 2111
Joined: 4/23/2006
From: St. Louis, Missouri
Status: offline

anybody know a good site to get a rebuild kit for the 9 bolt? if not it looks darn good as is, but i was gona go 3:72 or 70 or whatever messed up ratio this thing has. but i finally got the old rotors off. took almost a half a can of pb blaster and a 12 freggin pound sledge. but i got them off. lol the bolts holding the mounting bracket are soaking now. ill try and pull them off tomorrow and clean them up too. can i flip that one side 180 to make it face the rear without any problems? and obvioulsy install the calipers off a 89 instead. btw... hows the parking brake work on the 89 over a 88? still use the actual caliper or is it inside the rotor kinda like a drum?

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March 2008 Ride of the Month

89 RS, 60 over 350 crate, 5 speed.

Post #: 1

RE: 9 bolt rebuild - 9/25/2008 6:18:16 AM

blackz87

Posts: 1388
Status: online

1) For parts try Randy''s Gear & Pinion.
2) 11.655 rotors will require different backing plates. (not the same as the 10.5).
3) Gear change to 3:70/3:73 is in question untill you state which series carrier you have now. Those gears require 3-series carrier. Present ratio needs to be 3:27/3:45. Check the stamping on the ring gear. A 2:77 ratio means you are SOL for gear change.
4) Parking brake cables are also different and difficult to find. Also I can not recall the set up for the parking brake but it is different.

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87 Black IROC-Z28
350 Crate with TPI
original owner

(in reply to 350rs)

Post #: 2

RE: 9 bolt rebuild - 9/25/2008 9:01:07 AM

350rs

Posts: 2111
Joined: 4/23/2006
From: St. Louis, Missouri
Status: offline

yea its a 3:27 ratio. i found that awhile back. i thought i had posted a pic in a different thread but ill do it again here. i may be able to get the parts needed through work if i dig enough. but if its to much im just going to replace the seals and put new fluids in and put it back in my car.i will be redoing the brake lines. i think i found the emergancy brake cable at my work for the car, but ill have to look again. its gona be a PITA to get those brakes it working it sounds like. i may just stick with the 88 setup for awhile then go with a really nice bear setup i can get through work fairly cheap ( from what it originally cost)

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March 2008 Ride of the Month

89 RS, 60 over 350 crate, 5 speed.

(in reply to blackz87)

Post #: 3

RE: 9 bolt rebuild - 9/25/2008 9:36:13 AM

blackz87

Posts: 1388
Status: online

I would stick with the 3:27 ratio and forget about the gear change. My opinion, it is a good ratio for city/highway/performance.

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87 Black IROC-Z28
350 Crate with TPI
original owner

(in reply to 350rs)

Post #: 4

RE: 9 bolt rebuild - 9/25/2008 9:55:26 AM

350rs

Posts: 2111
Joined: 4/23/2006
From: St. Louis, Missouri
Status: offline

yea that was my thought to. for now i might just leave it since its such a PITA to get that done for these things. years down the road if i still have it i may go to a 12 bolt or something. btw, are these axels held in with c clips or are they a retainer like a 9"?

_____________________________

March 2008 Ride of the Month

89 RS, 60 over 350 crate, 5 speed.

(in reply to blackz87)

Post #: 5

RE: 9 bolt rebuild - 9/25/2008 10:11:30 AM

blackz87

Posts: 1388
Status: online

Axle shafts are held in by retainers, no "C" clips on any 9-bolt.

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87 Black IROC-Z28
350 Crate with TPI
original owner

(in reply to 350rs)

Post #: 6

RE: 9 bolt rebuild - 9/25/2008 10:37:08 AM

MadMikeZ28

Posts: 4276
Joined: 7/15/2006
Status: offline

Gear changes have not been limited to what carrier you have for a long time.
http://store.summitracing.com/egnsearch.asp?N=700+4294918962+4294901310+115+4294790781
If you go down the list you will find some where there are 2 sets of 3:73. One for numericaly higher and the other for lower number carriers.
(I choice 3:73 to lower the number of sets in my search)

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Post #: 7

RE: 9 bolt rebuild - 9/25/2008 12:30:03 PM

350rs

Posts: 2111
Joined: 4/23/2006
From: St. Louis, Missouri
Status: offline

quote:

ORIGINAL: blackz87

Axle shafts are held in by retainers, no "C" clips on any 9-bolt.

i thought i had read that somewhere, but its good to have someone else confirm it for me.

as for the gears. it may come down to cost. id LIKE to go with 3:73, but i do think that the 3:27 is a good mix between driveablility and performance.

i pulled the old rear out today. i tell you what, those brake cables are a pita.

_____________________________

March 2008 Ride of the Month

89 RS, 60 over 350 crate, 5 speed.

(in reply to blackz87)

Post #: 8

RE: 9 bolt rebuild - 9/25/2008 2:14:14 PM

blackz87

Posts: 1388
Status: online

quote:

ORIGINAL: MadMikeZ28

Gear changes have not been limited to what carrier you have for a long time.
http://store.summitracing.com/egnsearch.asp?N=700+4294918962+4294901310+115+4294790781
If you go down the list you will find some where there are 2 sets of 3:73. One for numericaly higher and the other for lower number carriers.
(I choice 3:73 to lower the number of sets in my search)

I guess you don''t know that 9-bolt & 10-bolt parts are not interchangeable. Also if you would read the Summit ad, it is for 7.500/7.625 dia 10-bolt gears for the 2&3 series carriers. No where is mention of thicker 7.750 dia 9-bolt gear in the 3:73 ratios.

_____________________________

87 Black IROC-Z28
350 Crate with TPI
original owner

(in reply to MadMikeZ28)

Post #: 9

RE: 9 bolt rebuild - 9/25/2008 4:21:06 PM

MadMikeZ28

Posts: 4276
Joined: 7/15/2006
Status: offline

quote:

ORIGINAL: blackz87

quote:

ORIGINAL: MadMikeZ28

Gear changes have not been limited to what carrier you have for a long time.
http://store.summitracing.com/egnsearch.asp?N=700+4294918962+4294901310+115+4294790781
If you go down the list you will find some where there are 2 sets of 3:73. One for numericaly higher and the other for lower number carriers.
(I choice 3:73 to lower the number of sets in my search)

I guess you don''''t know that 9-bolt & 10-bolt parts are not interchangeable. Also if you would read the Summit ad, it is for 7.500/7.625 dia 10-bolt gears for the 2&3 series carriers. No where is mention of thicker 7.750 dia 9-bolt gear in the 3:73 ratios.

Well you caught me on that goof.
But I guess what you don''t know is that unless he were to have a 2.77, all gears from a 2.92 to 4.11 will fit since it will aready have a 3 carrier. I looked this up before with the help of a guy that is a rear end specialist. I had to call him for the name of the site again (9bolt.com, how could I forget that).

So if he were to start with the next lowest in a Camaro, 3.08, (not 3.27 as you stated) he could go up to any gear.

But I forgot. Because you black87, have not seen it, it does not exist.
http://www.9bolt.com/gearsets.html