3.42 gears
#1
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Car: 1988 IROC
Engine: See Signature
Transmission: B&M 700r4
3.42 gears
I want to get a 3.42 posi rearend.... i have a 2.77 posi.... does anyone know where i could swap, or perhaps sell mine, or just buy a 3.42 posi????
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Car: 87 IROC-Z28
Engine: 305 TPI-New 355 on the engine stand
Transmission: T56
Axle/Gears: 3.73 Eaton posi-Soon a 9" Ford!
The stock 10 bolt posi's are a joke. Don't even bother with trying to find one. Maybe a 9 bolt with posi, but not a 10 bolt.
Probably your best bet is to pick up a 3.42 rear out of a junk yard, either posi or not. Doesn't matter either way, you are buying it for the gears that are installed in it. I got mine out of a 6cyl. stick car for $75, then put a zexel in it from SLP for $99 plus shipping, and I picked up a set of 28 spline axles for a 90 to 92 to complete the setup. (you have 26 spline axles in your car and they won't work with the zexel) If you get a replacement rear with the 3.42's in it and do drop in a zexel, it's much easier to put the new zexel posi in with the rear out of the car and on a bench.
Do a search on zexel, and take a look a this thread at my post. It kind of details on what's involved in changing the carrier out for a zexel. It's a little work putting the zexel in, but it's more than worth the trouble.
https://www.thirdgen.org/techbb2/sho...hreadid=148256
Probably your best bet is to pick up a 3.42 rear out of a junk yard, either posi or not. Doesn't matter either way, you are buying it for the gears that are installed in it. I got mine out of a 6cyl. stick car for $75, then put a zexel in it from SLP for $99 plus shipping, and I picked up a set of 28 spline axles for a 90 to 92 to complete the setup. (you have 26 spline axles in your car and they won't work with the zexel) If you get a replacement rear with the 3.42's in it and do drop in a zexel, it's much easier to put the new zexel posi in with the rear out of the car and on a bench.
Do a search on zexel, and take a look a this thread at my post. It kind of details on what's involved in changing the carrier out for a zexel. It's a little work putting the zexel in, but it's more than worth the trouble.
https://www.thirdgen.org/techbb2/sho...hreadid=148256
#3
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Car: 1988 IROC
Engine: See Signature
Transmission: B&M 700r4
well i have a 9 bolt, and i am looking for a stock 9 bolt, i want to do a strai swap, cause i do not know anything about rearend gears
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If you have a 9-bolt, you want 3:45 and not 3:42 gears which are not available. Just check back and I am sure Miles will reply with a answer to your question. Good Luck.
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Car: '88 Iroc, '91 RS, and a '70 RS
Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the ag
Transmission: A4, A4, slated to be a T56
Check the classified section. There's a guy up in Michigan selling a 3.42 disc posi. Or just look in the junkyards for a 90-92 V6 car and get that rear...it should be 3.42 ratio. I looked at one this morning.
You can get 9 bolt 3.45s and other ratios from Miles at www.9bolt.com
9 bolt stuff ain't cheap, but it's strong.
Ed
You can get 9 bolt 3.45s and other ratios from Miles at www.9bolt.com
9 bolt stuff ain't cheap, but it's strong.
Ed
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yeah its not gointo be cheap to get gears and everything u need to swap from the 2 series carrier to the 3 series carrier. i bought a 9 bolt posi disk rear with 2.77 gears and now im kinda regetin buyin it becuz its goin to cost alot to swap gears and a new posi and installation kit for the 9 bolt. i got the rear for 200 bucks but im not sure if i wanna sell it becuz, the posi works, has new calipers and rotors and i just painted the rear. ill probably give it a few more coats soon.
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#8
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Car: '88 Iroc, '91 RS, and a '70 RS
Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the ag
Transmission: A4, A4, slated to be a T56
82Z, keep a close eye on ebay. I saw a complete 3.27 9 bolt with the PBRs go for $150 last week and it was in NJ!!...I thought about it but that's too far to go for me.
Ed
Ed
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