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#1
11-20-2003, 12:11 AM
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I need to change the driven gear in my TH350 from a 39 tooth to a 45 tooth, but I found out the 45 tooth will not fit in the present holder(retainer) for the 39 tooth (slightly larger stem diameter as well as outside tooth diameter). I noticed that the present holder has numbers on the outside, like 36, 37, 38, 39 which I now assume is the size of the speedo gear that can be installed in this holder. Do I need to get a different holder for the 45 tooth (where?) or do I have the wrong speedo gear, or worse yet do I have to get a different drive gear for the transmission shaft? Thanks
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#2
11-20-2003, 12:11 AM
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I need to change the driven gear in my TH350 from a 39 tooth to a 45 tooth, but I found out the 45 tooth will not fit in the present holder(retainer) for the 39 tooth (slightly larger stem diameter as well as outside tooth diameter). I noticed that the present holder has numbers on the outside, like 36, 37, 38, 39 which I now assume is the size of the speedo gear that can be installed in this holder. Do I need to get a different holder for the 45 tooth (where?) or do I have the wrong speedo gear, or worse yet do I have to get a different drive gear for the transmission shaft? Thanks
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#3
11-20-2003, 10:20 AM
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M-38 sleeve for 40 through 45 teeth gear #1362285
Don't know how up-to-date the factory number is now. They might be able to cross-reference it,if it's out-dated. johnta1 Pontiac Power RULES !!! www.wallaceracing.com 
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#4
11-20-2003, 06:52 PM
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Get ahold of Scott Esterelle at summit and order the housing. I just did the same thing. Tci sells them but they have a minuminum order, so they told me to get it through summit. It was less than $10.
ET 13.2 and spinning like a mother
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ET 12.504 MPH 107 3940 lbs |
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#5
11-20-2003, 11:03 PM
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You could also check with one of your local transmission shops, that's what I did,they had bins of these speedo parts to sort thru. They can help you figure out what gears you need too. I just did this same swap on my 66 Lemans!
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1966 Lemans, 3700Lbs, 406 ci, #96 Heads, Crane 467/494 cam, RPM Intake, Q-Jet, 11 inch Converter, 3:90 gears, 3 inch exhaust, Best ET 12.62@107 MPH 414ci shortblock coming soon! |
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