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12-16-2012, 11:11 PM
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#1 |
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Registered User
Join Date: Jun 2011
Location: Monroe, WI
Posts: 1,415
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Trunnion pin replacement question
I have a NP 435 4 speed transmission, and I need to replace the trunnion pin that is on each side where the shifter is held into the transmission. How do I do this properly? The replacement ones that I got from the dealership have cracked when I try to set them with a punch to flare the end....
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Adam My 1967 C10 - Turbo 250 Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=485843 (608) 214-8706 |
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12-16-2012, 11:44 PM
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#2 |
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The Older Generation
   
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,772
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Re: Trunnion pin replacement question
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I'm not that familiar with them but are you sure they need to be flared? If they are a hardened pin (which they should be) they WILL crack when you try to flare them out.... I thought they floated and were held in place by the shifter boss on the inside and the cover when it is locked down on the outside... I guess I'm not sure without checking mine... LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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12-18-2012, 05:23 PM
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#3 |
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Registered User
Join Date: Jun 2011
Location: Monroe, WI
Posts: 1,415
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Re: Trunnion pin replacement question
The original one of the two require that is still on there, is flared. And yes they are a hardened pin... and yes i know that is why it is cracking. The locking part(cup) hooks on to the pin and is spring loaded. You press down the cup and give a 1/16 turn. but this doesnt keep the pin in the hole.... it just keeps the shifter in the hole.
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Adam My 1967 C10 - Turbo 250 Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=485843 (608) 214-8706 |
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