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

th 350 turbo or 700r4?????

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Old Apr 14, 2008 | 07:18 AM
  #1  
ajh87iroc's Avatar
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From: Lancaster, Pa
Car: 1987 Iroc-Z
Engine: SD360 350 Vortec
Transmission: 700R4
th 350 turbo or 700r4?????

I was wondering if someone could lead me in the right direction here. I currently have a 700r4 tranny and was wondering if I should put in a 350 turbo? I am in the process of installing a SD 360 engine (from a 305) and was wondering if the 700r4 will hold up and/or do I need to make changes to it such as adding in a shift kit (stage), and converter? Or do I need to change to a turbo 350? If I need to change, what needs to happen on the 350 for the sawp? I know I need a long tail (9" to keep the drive shaft), and a cross member http://www.spohn.net/?action=product&pid=1176. Will I need a torque arm bracket http://www.jegs.com/p/Hurst/746223/10002/-1/10531 or do I need both? Would there be anything else that needs to happen for this swap? Will my automatic shifting plate still line up with my indicators (ie, p,r,n,d,2,1), will my speed-o-meter still operate properly, or are there kits for this as well. Any opinions, suggestions and/or guidance will be greatly appreciated!

Sorry for all the dumb questions, and thanks for the help!

Tony
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Old Apr 14, 2008 | 01:38 PM
  #2  
89formula350b2l's Avatar
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From: Jacksonville, NC
Car: 92 Camaro
Engine: Dart SHP 406 HSR, LE heads
Transmission: Performabuilt Level 2, Vig 3200
Axle/Gears: S60 373
Re: th 350 turbo or 700r4?????

I went through this dilema a few months ago...https://www.thirdgen.org/forums/afte...ht=considering
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Old Apr 15, 2008 | 03:20 PM
  #3  
ajh87iroc's Avatar
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From: Lancaster, Pa
Car: 1987 Iroc-Z
Engine: SD360 350 Vortec
Transmission: 700R4
Re: th 350 turbo or 700r4?????

Thanks for the info! It is very useful! So, what did you end up doing? Keeping your 700r4 or put in a th350? and if you did put in a turbo 350 where did you get it and how did you make out?

Thanks!
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Old Apr 15, 2008 | 03:43 PM
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From: Southern Wisconsin
Car: 1988 Camaro
Engine: 383 Stroker
Transmission: Probuilt 700 R4
Axle/Gears: 3.73
Re: th 350 turbo or 700r4?????

check out probuilt, they have kits for the 700r4 that can handle 650 horse and more. Thats what I have and has worked great for the past year
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Old Apr 16, 2008 | 06:48 AM
  #5  
ajh87iroc's Avatar
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From: Lancaster, Pa
Car: 1987 Iroc-Z
Engine: SD360 350 Vortec
Transmission: 700R4
Re: th 350 turbo or 700r4?????

Okay great! I'll look into probuilt.

Thanks!
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