Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Need a little help

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Old 10-19-2011, 12:06 AM
  #1  
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Car: 91 RS deseased- Now 1986 Iroc-Z
Engine: 5.0 V8 305 deceased- Now 305 TPI
Transmission: 700r4 deceased- Now T5
Axle/Gears: 3.42 deceased- Now unknown
Need a little help

So, i saved some cash bought a 7.5 3.42 gear set. I have a stock 91 RS with a 305. I took the car to a guy that has years of experince in rebuilding trannys and rearends. He told me that the gears I bought do not work. He had my rear end fully apart with the gears in and he said the pinion was not connecting with the ring gear. I have looked at this subject for the last hour. I have no experience doing rear ends but I am about to tear this thing apart. Does this issue have to do with my carrier? I currently have 2.73 gears in there right now. Do I need a ring spacer to make these work or did I really buy the wrong gears. Please see the attachment for pictures of the gears. I am pretty pissed because I bought the gears for 65 used and paid the guy 125 bucks to have the same 2.73's in my car right now. Thank you in advance for your responses.
Attached Thumbnails Need a little help-2011-10-18-19.12.23.jpg   Need a little help-2011-10-18-19.13.12.jpg  
Old 10-19-2011, 12:38 AM
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Car: 87 iroc-z
Engine: 454
Transmission: th350
Axle/Gears: 3.73
Re: Need a little help

unfortunetly hes correct. the proper ring gear spacer or a different carrier would work. they also make thicker 3 series gears for 2 series carriers. bummer.
Old 10-19-2011, 01:09 AM
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Join Date: Aug 2011
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Car: 91 RS deseased- Now 1986 Iroc-Z
Engine: 5.0 V8 305 deceased- Now 305 TPI
Transmission: 700r4 deceased- Now T5
Axle/Gears: 3.42 deceased- Now unknown
Re: Need a little help

So would it be best for me to find a ring gear spacer? I am not trying to make this a 350 horse power car. I just want a little more pickup an go. really dont want to get a 3 series carrier either. Where could I go to get the proper size ring gear spacer.
Old 10-19-2011, 06:12 AM
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Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Need a little help

Welcome to TGO.

You might take a peek at the following for general info on the subject:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC




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