Other Drop In Donors?
#1
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Car: 1991 Z28 Vert
Engine: 305 TPI
Other Drop In Donors?
I've been looking for either a 3.42 or a 3.73 posi that'll drop into my 91 Z28 vert but I'm finding that I'll either have to pay $400 bucks for one local or drive to the dfw area and hope that I don't waste a day. Are there any other vehicles that are viable donors without a bunch of mods?
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Car: 1992 Camaro RS
Engine: Rebuilt 350 going in after paint
Transmission: WCT5, 7k & counting behind the 350
Axle/Gears: 4thgen disc rear w/ 3.73 Posi
Re: Other Drop In Donors?
80s & 90s S10/S15 used the same ring & pinion size as the thirdgens. The posi carrier in those trucks isn't very strong however. It is a locking type posi unit that tends to break under hard use. The gearsets however will hold up same a third/fourthgen gearset. I'm currently running 3.73 gears from an S10 in my camaro, but I have a posi unit from a fourthgen. You could also try looking at the impalas/caprices from the 90s as well as the 80s Monte Carlos, I'm not sure what rear axle they used, but it might work.
#3
Re: Other Drop In Donors?
Are you talking about a complete rear end or just a set of gears and a differential? If you want a complete bolt in rear end the only true bolt in will be from a '82 to '92 Camaro or Firebird. The '93 to '02 Camaro and Firebird rear ends will bolt in, but they are about 4 inches wider.
If you want a set of gears and a differential then the S10 is going to be your best bet because the other cars that used the 7.5 rear end usually had 2.73, 2.56 or 2.41 gears in them. The Governor Lock differential that was used in the S10 isn't very good for a performance car and should be avoided. A new Yukon Dura Grip or Eaton Truetrac would be a good choice. Be sure to match it to the axles that you have. The '82 to '89 rear ends had 26 spline axles and the '90 and later rear ends had 28 spline axles.
If you want a set of gears and a differential then the S10 is going to be your best bet because the other cars that used the 7.5 rear end usually had 2.73, 2.56 or 2.41 gears in them. The Governor Lock differential that was used in the S10 isn't very good for a performance car and should be avoided. A new Yukon Dura Grip or Eaton Truetrac would be a good choice. Be sure to match it to the axles that you have. The '82 to '89 rear ends had 26 spline axles and the '90 and later rear ends had 28 spline axles.
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Car: 1988 Camaro
Engine: 355, 10.34:1, 249/252 @.050", IK200
Transmission: TH-400, 3500 stall 9.5" converter
Axle/Gears: Ford 9", detroit locker, 3.89 gears
Re: Other Drop In Donors?
For a complete rear end your only options is third and 4th gen F body cars.
Like BGH said, all 82-92 camaro/firebird will swap right in, and the 93-02 camaro/firebird will bolt right up but are wider and will force you to run 4th gen wheels on the rear to make it work
Like BGH said, all 82-92 camaro/firebird will swap right in, and the 93-02 camaro/firebird will bolt right up but are wider and will force you to run 4th gen wheels on the rear to make it work
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Car: 1991 Z28 Vert
Engine: 305 TPI
Re: Other Drop In Donors?
That's kinda what I figured since I hadn't seen anyone else reference any other donors but i thought I'd ask. Guess I'll just be patient and keep looking.
The 4th gen wheels are a no go for me. I wouldn't mind a little wider spacing in the rear but not at the expense of the original wheels. Thanks to all for responding!
The 4th gen wheels are a no go for me. I wouldn't mind a little wider spacing in the rear but not at the expense of the original wheels. Thanks to all for responding!
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Car: 1989 camaro rs convertable
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: 7.5"3.42 gears forth gen 2000 camar
Re: Other Drop In Donors?
be aware that most v6 third gens had 3.42 gears and they are the same as the v8s other than the ratio.unlikely to be posi though.
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Car: '86 Camaro, '94 Camaro, 3 others
Engine: LG4 ->L29, L32->LR4, L36, LG4, L31
Transmission: 700R-4, T5WC, 4L80E, SM465, 4L60E
Axle/Gears: 3.42, 3.23, WTB/WTT 2.93
Re: Other Drop In Donors?
Only 4.3L S-10s had the 7.625" ring gears in '88-'93, all the rest were 7.50". This matters, as the R&P are the weakest link, once you have 28-spline shafts. And 4.3s could have 3.42:1, same as in the Astro minivans.
Setting up gears isn't bad if you're patient, so I'd get S-10 gears and a '98-'02 Zexel Torsen takeout. Genuine GM 3.73:1 7.625" gears are scarce, but finally appeared in some later 2.2L S-10s. Likewise 4.10:1. Most GM 3.73:1 are 7.50". Or from a big pickup = useless to us.
Setting up gears isn't bad if you're patient, so I'd get S-10 gears and a '98-'02 Zexel Torsen takeout. Genuine GM 3.73:1 7.625" gears are scarce, but finally appeared in some later 2.2L S-10s. Likewise 4.10:1. Most GM 3.73:1 are 7.50". Or from a big pickup = useless to us.
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Car: 1991 Z28 Vert
Engine: 305 TPI
Re: Other Drop In Donors?
For a complete rear end your only options is third and 4th gen F body cars.
Like BGH said, all 82-92 camaro/firebird will swap right in, and the 93-02 camaro/firebird will bolt right up but are wider and will force you to run 4th gen wheels on the rear to make it work
Like BGH said, all 82-92 camaro/firebird will swap right in, and the 93-02 camaro/firebird will bolt right up but are wider and will force you to run 4th gen wheels on the rear to make it work
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Car: '86 Camaro, '94 Camaro, 3 others
Engine: LG4 ->L29, L32->LR4, L36, LG4, L31
Transmission: 700R-4, T5WC, 4L80E, SM465, 4L60E
Axle/Gears: 3.42, 3.23, WTB/WTT 2.93
Re: Other Drop In Donors?
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Car: 1988 Camaro
Engine: 355, 10.34:1, 249/252 @.050", IK200
Transmission: TH-400, 3500 stall 9.5" converter
Axle/Gears: Ford 9", detroit locker, 3.89 gears
Re: Other Drop In Donors?
It's the backspacing/offset. Flip the wheel upside down and measure from the back of lug mounting pad to outside lip.
The 4th gen wheels are around 2.25" deeper.
This is the same reason why you need 2" to 2.25" thick wheel spacers on third gens when you put 4th gens on them.
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