07-14-2007, 10:31 AM | #1 |
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3 speed differences
Apparently there are two types. I have one that is in a long bed with a 250 6 cylinder and it is different than a friends V8 longbed with a 3 speed. Are they interchangeable or do you need a different drive shaft?
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07-14-2007, 12:21 PM | #2 |
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Re: 3 speed differences
One is probably a Muncie 3 speed w/out a syncro first gear, while the other is probably a Saginaw with a syncronized first gear. That's the simple answer, for a more complex and confusing answer do a search. This topic came up about 8 months ago and has lot's of pictures.
Almost forgot, although they will bolt up the same, they are not the same length and will require some driveshaft mods.
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07-14-2007, 12:50 PM | #3 |
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Re: 3 speed differences
Is there a preference of one over the other. One better than the other?
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07-14-2007, 01:15 PM | #4 |
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Re: 3 speed differences
I was always under the impression there was a "wide ratio" and a "close ratio" 3-speed. ???
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07-14-2007, 01:35 PM | #5 |
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Re: 3 speed differences
Yes! The one with the synchros in it is preferable. Basically, if you have to come to a complete stop in order to put it into 1st gear then you have a non-synchro transmission. If you can put it into 1st at say, 15-30 mph, then you have a synchronized transmission. These are much more fun to drive.
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07-14-2007, 02:24 PM | #6 |
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Re: 3 speed differences
Early 60's was the last for non-synchro 3 speeds. GM did use fully synchronized 3 speeds in our trucks, I have a 71 with one. Here is the thread from a while back on the subject.
http://67-72chevytrucks.com/vboard/s...t=muncie+speed The Muncie is a heavier tranny and has a lower 1st (I think) but you don't see many of them.
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07-14-2007, 07:26 PM | #7 |
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Re: 3 speed differences
The non syncrow 3speeds were in the cars till the mid 60's(about 65 IIRC), however the trucks had them as standard equipment on the 6 cyl through 67 or 68. the sb powered trucks had the saginawfrom 67 on, & I beleive the BB powered trucks had the heavier Muncie, that looked simular to the saginaw. 69 on had the I 6 & the smallblock trucks with with the saginaw as standard equipment. L
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07-14-2007, 10:24 PM | #8 |
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Re: 3 speed differences
It looks like the non-saginaw is shorter, is that true. So you would need a longer drive shaft.
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07-14-2007, 10:28 PM | #9 |
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Re: 3 speed differences
wow ! thanks for bringing this up, here i thaught my trans was beat.
it sounds like i have a non syncro trans. thanks
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07-15-2007, 12:14 AM | #10 | |
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Re: 3 speed differences
Quote:
Btw, just to be clear my '67 came with what I believe was a Muncie 3 speed non-synchro trans.
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