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Discussion Starter · #1 ·
i was wondering why my speedo stoped working after i swapped out my th 400 for the 4 speed turns out the speedo speed sensor in the trans mission is missing i have everything but the gear made of plastic i think....i know they come in diffrent colors can anyone tell me where i can buy one so i can get my speedo to work thanks..
 

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I took mine from an old aluminum powerglide we had sitting around. I just pulled the whole speedo piece out of the powerglide and stuck it in the muncie.

Also the last Swap meet I went to, a guy had all the different colored gears for $10.00 each.
 

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You can still probably get the gears at a Chevy dealer.

TCI Transmissions has a chart and a calculator on their web site that will help you pick the right plastic gear. I think they sell the gears too.

The Muncie transmission uses the same plastic gears as a TH350 or aluminum Powerglide.
 

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your probably gonna be off due to tire size and gear ratio..... I haven't used a speedo in years (on the hot rods) Unless you get the right gear reducer (expensive) I wouldn't bother.... My .02
 

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Discussion Starter · #8 ·
You can still probably get the gears at a Chevy dealer.

TCI Transmissions has a chart and a calculator on their web site that will help you pick the right plastic gear. I think they sell the gears too.

The Muncie transmission uses the same plastic gears as a TH350 or aluminum Powerglide.


hey i tryed to pull the speedo gear outta my th350 it wasnt even close to the same size it was way bigger so now i hae to locate one that will fit thanks anyway ..
 
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