#1  
Old 03-30-2017, 08:46 AM
heckinohio heckinohio is offline
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Join Date: Jan 2006
Location: southeastern Ohio
Posts: 324
Default BW 4speed tooth count combos.....

I didnt see a trans specific heading in the tech forums column......so, I have accumulated a "pile" of ST-10 stuff.......mostly broken. I have 4 sets of driven gears, two good input shafts & one good cluster, one case iron main case, 3 aluminum ones & one good tail-housing. One input has 3 rings, the other 2. I have determined that all the driven gears that I have are the same tooth counts.

Now, the question; the good cluster I have has 27 teeth on the front...........the input gears are 20 & 21......

Are either of these correct for the 27 count cluster???

PJH

  #2  
Old 03-30-2017, 11:12 AM
John Milner's Avatar
John Milner John Milner is offline
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The two ring input shaft should work with your cluster gear. The input should have 21 teeth.

  #3  
Old 03-30-2017, 08:56 PM
heckinohio heckinohio is offline
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Disaster struck when I examined the condition of the parts I planned to use.......the 21 tooth input was run without oil.....only good for clutch alignment tool now.!!!!

Where does one buy replacement BW gears.???

Back to planning stage.........

PJH

  #4  
Old 03-30-2017, 09:31 PM
74Grandville 74Grandville is offline
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i would contact a place like www.5speeds.com and see if they have a good one they can sell you. you can buy them new too.

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1979 Firebird Trans Am 301/4spd (Now 428)
1977 Firebird Formula 400/Auto
2007 Grand Prix GXP 5.3L
  #5  
Old 03-30-2017, 09:38 PM
74Grandville 74Grandville is offline
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Here is a chart I found that may be usefull.


I just rebuilt my ST-10. I read Pauls book as well as watched all his Muncie and ST-10 videos on youtube "Gearboxvideo". After everything I learned, it was a piece of cake.
Attached Files
File Type: pdf T-10 RATIOchart.pdf (78.4 KB, 25 views)

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1979 Firebird Trans Am 301/4spd (Now 428)
1977 Firebird Formula 400/Auto
2007 Grand Prix GXP 5.3L
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