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What speedometer gear/housing?

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80Grand_LeMans
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Location: Peabody MA

What speedometer gear/housing?

Post by 80Grand_LeMans » Sun May 27, 2012 7:57 pm

I for some reason lost the spedometer housing and gear from my transmission out of a 76 Cutlass. Its a th350 and has one that looks like this:

Image

I'm not sure how to figure out what gear I need though. I noticed there's a difference in how many teeth the gear has, and also has to match the axle ratio and tires ](*,) . My 1980 Grand LeMans still has the stock 7.5 non posi in it. Also not sure where I could get one for cheap :-k Thanks for any help.
Image

1980 Pontiac Grand LeMans
-Mild Olds 350, TH350, 7.5 one tire fire :(

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SSedan64
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Re: What speedometer gear/housing?

Post by SSedan64 » Fri Jun 01, 2012 3:58 am

The BOP TH350 uses the same Speedo Housing & Gears as a TH400. The Chevy TH350 parts are different.
http://www.transmissioncenter.net/speed ... va.htm#400" onclick="window.open(this.href);return false;
http://www.chevellestuff.com/tech/speedo.htm" onclick="window.open(this.href);return false;

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80Grand_LeMans
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Posts: 1249
Joined: Wed Jun 04, 2008 11:42 am
Location: Peabody MA

Re: What speedometer gear/housing?

Post by 80Grand_LeMans » Fri Jun 01, 2012 7:45 am

Thanks a lot! I wasn't sure why I could only find listings for th400 but it makes sense now. I'm going to just pull one from an olds at the junkyard and hope the teeth work with what I have.
Image

1980 Pontiac Grand LeMans
-Mild Olds 350, TH350, 7.5 one tire fire :(

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