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How many tooth flywheel do I need.

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Old Apr 29, 2015 | 09:19 AM
  #1  
EDGE's Avatar
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From: Mississauga, Ontario Canada
Car: 1987 GTA
Engine: 5.7
Transmission: T5WC
Axle/Gears: 3:27
How many tooth flywheel do I need.

I have a 5.7 700R4. I'm switching it over to a 5 speed and noticed there's a 153 and 168 (I think) tooth standard flywheel available. Which would I need to avoid starter issues? Mines still installed so I can't check right now. I'd like to start getting orders in for this swap.
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Old Apr 29, 2015 | 11:19 AM
  #2  
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From: Howard Lake, MN
Car: 86 Camaro
Engine: 355- hopefully a 5.3 this summer
Transmission: 700r4
Axle/Gears: 3.42
Re: How many tooth flywheel do I need.

153.. the larger ring gear won't even fit inside the stock T5 bellhousing..
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Old Apr 29, 2015 | 02:28 PM
  #3  
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: How many tooth flywheel do I need.

Neither will the auto starter.
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Old Apr 29, 2015 | 02:39 PM
  #4  
EDGE's Avatar
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From: Mississauga, Ontario Canada
Car: 1987 GTA
Engine: 5.7
Transmission: T5WC
Axle/Gears: 3:27
Re: How many tooth flywheel do I need.

Originally Posted by Dyno Don
Neither will the auto starter.
Really? I have to change the starter too? Can I get away with just changing the pinion?
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Old Apr 29, 2015 | 04:15 PM
  #5  
danryanm's Avatar
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From: Murrayville, GA
Car: '86 Trans Amvanian Frankenbird
Engine: 350 4bbl
Transmission: T5 4.03/.76
Axle/Gears: 3.42
Re: How many tooth flywheel do I need.

Changing the pinion would be even more work. If you have a factory bell housing, use a 153-tooth flywheel and pick up a starter from any parts house (mine cost a whole $25 and has a lifetime warranty.) If you are using a scattershield, you can use either flywheel, just make sure to get a starter made for it (stagger bolt pattern for the 168-tooth or inline for the 153-tooth.) Also a consideration, not all blocks are drilled to accept both starters. Of course, which clutch kit you get is also dependent upon which flywheel you use and which input shaft your transmission has. Again, no worries here, just look at what you have and match accordingly.
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Old Apr 29, 2015 | 06:26 PM
  #6  
Dyno Don's Avatar
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: How many tooth flywheel do I need.

Originally Posted by EDGE
Really? I have to change the starter too? Can I get away with just changing the pinion?
It's the nose of the auto starter that is too big.

You night want to check, sometimes when they get replaced, they give out the standard starter at the auto parts store. (they both work on an auto)

It's just a little round on the end where the bolts are.
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Old Apr 29, 2015 | 06:28 PM
  #7  
EDGE's Avatar
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From: Mississauga, Ontario Canada
Car: 1987 GTA
Engine: 5.7
Transmission: T5WC
Axle/Gears: 3:27
Re: How many tooth flywheel do I need.

Originally Posted by danryanm
Changing the pinion would be even more work. If you have a factory bell housing, use a 153-tooth flywheel and pick up a starter from any parts house (mine cost a whole $25 and has a lifetime warranty.) If you are using a scattershield, you can use either flywheel, just make sure to get a starter made for it (stagger bolt pattern for the 168-tooth or inline for the 153-tooth.) Also a consideration, not all blocks are drilled to accept both starters. Of course, which clutch kit you get is also dependent upon which flywheel you use and which input shaft your transmission has. Again, no worries here, just look at what you have and match accordingly.
This is a pure street car. No track so I'm just using the stock T5 bell housing and factory size flywheel and clutch. I guess I'd just get the 305 starter for a manual?
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Old Apr 30, 2015 | 07:26 AM
  #8  
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From: Murrayville, GA
Car: '86 Trans Amvanian Frankenbird
Engine: 350 4bbl
Transmission: T5 4.03/.76
Axle/Gears: 3.42
Re: How many tooth flywheel do I need.

Correct on the starter. You will need the 153-tooth flywheel. One final question: What did your T5 come out of? If you don't know, then how many splines are on the input shaft and what is its diameter?
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Old Apr 30, 2015 | 08:18 AM
  #9  
EDGE's Avatar
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From: Mississauga, Ontario Canada
Car: 1987 GTA
Engine: 5.7
Transmission: T5WC
Axle/Gears: 3:27
Re: How many tooth flywheel do I need.

Its from an 88 GTA 305
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Old Apr 30, 2015 | 08:52 AM
  #10  
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From: Murrayville, GA
Car: '86 Trans Amvanian Frankenbird
Engine: 350 4bbl
Transmission: T5 4.03/.76
Axle/Gears: 3.42
Re: How many tooth flywheel do I need.

In that case, you'll be fine with an off-the-shelf replacement clutch kit.

If you encounter any snags, there are plenty of us who've done the job and are more than willing to help. It is by far the best thing I've ever done to the car; it completely changes its character. You won't regret it.
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Old Apr 30, 2015 | 09:14 AM
  #11  
EDGE's Avatar
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From: Mississauga, Ontario Canada
Car: 1987 GTA
Engine: 5.7
Transmission: T5WC
Axle/Gears: 3:27
Re: How many tooth flywheel do I need.

Originally Posted by danryanm
In that case, you'll be fine with an off-the-shelf replacement clutch kit.

If you encounter any snags, there are plenty of us who've done the job and are more than willing to help. It is by far the best thing I've ever done to the car; it completely changes its character. You won't regret it.
Thanks. Been wanting to do this for a long time. Can't imagine what that thing will be like with a 5 speed.
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