TH 400 speedometer drive gear clip?

[565bbchevy]

I found 2 different clips that look the same but one is wider and since my race trans came with no drive gear I need to install one.
Anyone know which one is correct for the TH400?
The GM part numbers are below each one

TCI Auto 880024 TCI Speedometer Gear Clips | Summit Racing

Free Shipping - TCI Speedometer Gear Clips with qualifying orders of $109. Shop Speedometer Gear Clips at Summit Racing.

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5/16 in. wide gear clip. Replaces OEM part 6261781.

TCI Auto 880026 TCI Speedometer Gear Clips | Summit Racing

Free Shipping - TCI Speedometer Gear Clips with qualifying orders of $109. Shop Speedometer Gear Clips at Summit Racing.

www.summitracing.com

7/16 in. wide gear clip. Replaces OEM part 8628557.

 

[69hurstolds]

Everything I'm coming up with for M40 (TH400) is GM p/n 8626089 for the speedo gear drive clip from 1960s on up to the 3L80. It was 15 cents MSRP back in 1972!!! Not so cheap anymore.

NOS CHEVROLET 1971 -72 Camaro 73 - 76 Corvette Speedo Drive Gear Clip GM 8626089 | eBay

Find many great new & used options and get the best deals for NOS CHEVROLET 1971 -72 Camaro 73 - 76 Corvette Speedo Drive Gear Clip GM 8626089 at the best online prices at eBay! Free shipping for many products!

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GM Oem Speedometer Drive Gear Clip 1971-72 Camaro, 73-76 Corvette # 8626089 NOS | eBay

Find many great new & used options and get the best deals for GM Oem Speedometer Drive Gear Clip 1971-72 Camaro, 73-76 Corvette # 8626089 NOS at the best online prices at eBay! Free shipping for many products!

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