One of the tech articles on Thirdgen.org about building your 7.5 10 bolt has some incorrect information! To help the 7.5 take racing abuse it is recommended that a Zytanium Cross Pin from Next Generation (Part #66) be used. The cross pin is too large in diameter to fit into our ring gear carriers. The cross pin is for a 8.5 inch 10 bolt! I am using the Borg-Warner cone posi unit and the Zytanium cross pin from Powertrax did not fit at all. Just a heads up so you don't get stuck with spending 28 bucks for nothing. ------------------ 84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.) Other Mods: You name it and I have probably changed it. 91 Firebird 5.0L TBI ASE Certified Auto Tech LIVE AND DIE BY THE ALMIGHTY BOWTIE! [This message has been edited by CamaroMike (edited October 13, 2000).]

I wrote the article you speak of.I used this pin in a Auburn posi,before I went to the Zexel Torsen unit.Maybe it just doesn't work in the paticular type that you have.
It is listed in the Next Generation catalog which specifically lists parts for 82-present f-body cars.An 8.5" diff never came in these cars.

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92 GTA(only 226 made)ort matched sportsman heads with 2.05 valves,64 cc,milled .015,.028 head gaskets,port matched Accel runners,port matched plenum,port matched edelbrock intake,flow matched injectors,jet hot headers and 2.5" mandrel bent exhaust,Flowmaster muffler,underdrive pulleys,slp cam,1.6 rockers,slp cold air induction,52mm throttlebody,performance resource custom chip,Dyna module,Screamin Demon coil,Accel 8.8 wires,Bosch platinum plugs,timing at 10 degrees,tb bypass,relocated map sensor,shift kit,Fairbanks billet servo,pump vane kit & 2400 stall,Torque converter lockup switch,3.42 posi with welded axle tubes,Zexel Torsen HD diff.,Summit rearend girdle,solid pinion spacer,& alloy axles.Boxed panhard bar,lakewood lca's & edelbrock strut tower brace,Jeg's torque arm,Jegs welded in subframe connecters.Performance friction pads,turbo slotted front rotors,stainless braid brake lines.Roh ZT 17x8.5 front wheels with 255/40ZR/17 tires. 17x9.5 rear wheels with 275/40ZR/17's on the street.Hoosier 26x9.5 slicks on the strip.

Its probably because you are using a 9 bolt carrier in your 10 bolt. That carrier is a 7.75" rear not a 7.5. If I am wrong somone please correct me.

James

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If the women don't find you handsome they should at least find you handy

KwikGTA, what's up! Thanks for responding. My carrier is a ten bolt Borg Warner Cone Type, which is a pre 87 carrier. I believe your research is solid but for some reason the pin does not fit my carrier. Now I will admit that I purchased my carrier from someone with a ten bolt from a Monte Carlo but I know the 7.5 carriers are the same as the Camaros. Maybe my carrier is from a "early" 7.5 rear but I doubt that would change the cross pin diameter. The only difference that I know of in the early 7.5 is the size of one of the pinion bearings. The early 7.5 has a smaller rear pinion bearing. FYI The early 7.5 was from 76-81. I was told my carrier is from an 82 and newer 7.5 rear but I am looking for reasons that the pin does not fit. Maybe the Auburn in the 7.5 is stronger because it has a larger cross pin, which would attribute to the other carriers weaknesses. All I know is that the Borg Warner ten bolt cone type posi unit should be the same from every pre 87 ten bolt. If that is so then some thirdgenners could not use the Zytanium cross pin. Thanks for your input!

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

Hey Kwik just called Jegs and went to the Powertrax site. The Powertrax part # Next Gen sends under part D66 is SG1920. SG1920 is for a 28 spline 8.5 rear! Jegs has no Powertrax listing for a 7.5 cross pin. Hope this helps. Weird how your pin worked, what awesome luck!

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

[This message has been edited by CamaroMike (edited September 28, 2000).]

I don't know but I swear I used it in mine.I do know that the earlier rears really were 7.5" and later they were 7.625",mine is the 7.625".

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92 GTA(only 226 made)ort matched sportsman heads with 2.05 valves,64 cc,milled .015,.028 head gaskets,port matched Accel runners,port matched plenum,port matched edelbrock intake,flow matched injectors,jet hot headers and 2.5" mandrel bent exhaust,Flowmaster muffler,underdrive pulleys,slp cam,1.6 rockers,slp cold air induction,52mm throttlebody,performance resource custom chip,Dyna module,Screamin Demon coil,Accel 8.8 wires,Bosch platinum plugs,timing at 10 degrees,tb bypass,relocated map sensor,shift kit,Fairbanks billet servo,pump vane kit & 2400 stall,Torque converter lockup switch,3.42 posi with welded axle tubes,Zexel Torsen HD diff.,Summit rearend girdle,solid pinion spacer,& alloy axles.Boxed panhard bar,lakewood lca's & edelbrock strut tower brace,Jeg's torque arm,Jegs welded in subframe connecters.Performance friction pads,turbo slotted front rotors,stainless braid brake lines.Roh ZT 17x8.5 front wheels with 255/40ZR/17 tires. 17x9.5 rear wheels with 275/40ZR/17's on the street.Hoosier 26x9.5 slicks on the strip.

Kwik, FYI there are 3 ten bolt 7.5 inch rear ends. Only two of them came in the 82 and newer Camaros. The 76-81 small pinion bearing 7.5 (mostly G body), 82-mid 80's large pinion bearing 7.5, and the late 80's 7.625 are the three types. It really does'nt matter though because most aftermarket gears are 7.5 anyway and the bearings in the old rears can easily be updated by replacement.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

I looked in my Next Gen catalog & it says that the Zytanium cross pin works in 84 thru 96 third & fourth generation 10 bolts.Like I said earlier I had one in my car before I went to the HD Zexel unit.I don't know why it won't fit in your partiular assembly.

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92 GTA(only 226 made)ort matched sportsman heads with 2.05 valves,64 cc,milled .015,.028 head gaskets,port matched Accel runners,port matched plenum,port matched edelbrock intake,flow matched injectors,jet hot headers and 2.5" mandrel bent exhaust,Flowmaster muffler,underdrive pulleys,slp cam,1.6 rockers,slp cold air induction,52mm throttlebody,performance resource custom chip,Dyna module,Screamin Demon coil,Accel 8.8 wires,Bosch platinum plugs,timing at 10 degrees,tb bypass,relocated map sensor,shift kit,Fairbanks billet servo,pump vane kit & 2400 stall,Torque converter lockup switch,3.42 posi with welded axle tubes,Zexel Torsen HD diff.,Summit rearend girdle,solid pinion spacer,& alloy axles.Boxed panhard bar,lakewood lca's & edelbrock strut tower brace,Jeg's torque arm,Jegs welded in subframe connecters.Performance friction pads,turbo slotted front rotors,stainless braid brake lines.Roh ZT 17x8.5 front wheels with 255/40ZR/17 tires. 17x9.5 rear wheels with 275/40ZR/17's on the street.Hoosier 26x9.5 slicks on the strip.

The third gen's used the same Borg Warner Cone Posi as the Monte's, so I can not see why there would be a difference. I guess I am just unlucky. Thanks anyway Kwik and long live the Thirdgenners!

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!