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Shift Fork Roll pin Size????


RugerLuger

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Does anyone know what the actual dimensions are for the diameter of the shift fork roll pins? (Nissan Calls em retaining pins) I replaced a shift fork a few months ago and used the closest size roll pin I could find from the hardware store- as Nissan has then on backorder. It just fell out this last Friday on my way to work. So I want to visit the local fastener specialty vendor and get the proper metric ( I assume) sized roll pin rather than wait for Nissan to get them in. Any help would be greatly appreciated.

 

Tranny is 1980 Fs5w71b close ratio out of 280zx.

 

Thanks

 

Rugerluger

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The hole is 0.192" (I just measured a 71B one) or a calculated 4.87mm so the pin is usually slightly larger so it's compressed when driven in. A 5mm pin is only 0.005" larger... not really that much different. Maybe talk to a machinist about it. It should be more than tight enough to not ever fall out.

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Got my transmission apart and dug out my calipers. Just like Mike said they are 5mm x 25mm. I also measured the I.D. for the double pin upgrade. My pins would take 3mm x 25mm roll pins down the center if I go that route and for $0.38 I think I will.

 

Thanks everyone for your help.

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