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Transmissions and Rear Ends Three on the tree or four in the floor? Shift it all here.

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  #1  
Old February 26th, 2019, 01:39 AM
GTS61 GTS61 is offline
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Default Transmission???

I’m trying to find out what transmission I have in my 61 305 V6 with 3 on the tree. It’s the original tranny. Anyone know?? Thanks
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Old February 26th, 2019, 02:07 AM
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FetchMeAPepsi FetchMeAPepsi is offline
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Default Re: Transmission???

Probably the Muncie SM318, but if you post a pic of the cover where the shifter connects I can tell you for sure.
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Some people are like slinkys. Not worth much but funny as heck when pushed down stairs.
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Old February 26th, 2019, 03:47 PM
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Default Re: Transmission???

Thanks Fetch!!
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Old February 26th, 2019, 04:06 PM
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Default Re: Transmission???

Nope, that's a 7 bolt (looks like). I *think* that's the Saginaw SM-326, which folks liked better than the 318. If it has 9 bolts, it's a Warner Heavy duty model. I'm guessing that it was replaced at some point. i'm pretty sure the 318 was standard for that year. Congrats on the upgrade!
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Some people are like slinkys. Not worth much but funny as heck when pushed down stairs.
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Old February 27th, 2019, 03:10 AM
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Default Re: Transmission???

fetch, you are right. the sm-318/9 had a 4-bolt cover. I did this to two GMC's I have owned over the years. I like the fully syncronized transmission better than the original un-syncronized 1st gear in the 318's.
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