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Old 06-16-2012, 05:39 PM   #1
malex 62sub
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help with my 3 speed, just craped out!

hey guys, i have a 62 gmc sub with v6(305) 3 speed and the trans just went out, i have been looking on some posts but cant find the answers to my questions.

1. can i take a 3 speed trans off of a straight 6 and bolt it to my v6?
2. what auto trans will bolt on to my v6?
3. will an s10 5 speed bolt up to thr v6?

thanks !! guys for helping me with my stupid questions.

Malex
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Old 06-18-2012, 10:19 PM   #2
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Re: help with my 3 speed, just craped out!

anybody??
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Old 06-18-2012, 10:24 PM   #3
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Re: help with my 3 speed, just craped out!

i think that gmc v6 has a diff bellhousing pattern than the straight sixes. it may have the same as some v8s but i could be wrong .dont have experience with them
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Old 06-18-2012, 11:14 PM   #4
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Re: help with my 3 speed, just craped out!

I used to swap 3 speeds in my '64 GMC about every 3 months. Never had a problem finding one at the junk yard. If the bellhousing is different pattern its at the block...trans is nothing special.
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Old 06-18-2012, 11:31 PM   #5
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Re: help with my 3 speed, just craped out!

When you say "Crapped out" what does that mean exactly? They're not hard to do maintenance and repairs on.
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Old 06-19-2012, 12:21 AM   #6
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Re: help with my 3 speed, just craped out!

Malex you will need the factory adapter to put an automativ behind your v6.
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Old 06-19-2012, 10:02 AM   #7
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Re: help with my 3 speed, just craped out!

just for information inline six bellhousings are the same bolt pattern as V8s
not sure about the GMC stuff though

I currently using a bellhousing off my old 250 inline six on my 1987 350
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Old 06-19-2012, 03:02 PM   #8
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Re: help with my 3 speed, just craped out!

Well becareful you don't get a 63-67 bellhousing off a Chevy II! ...It'll bolt up to a L6 & a V8 ok, but the throw-out lever is positioned in a different location then the standard 9 oclock location. FYI ...Chevy II throw-out levers are positioned at 7 oclock!! ...AND YES, I know that the hard way!!!
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Old 06-21-2012, 01:50 PM   #9
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Re: help with my 3 speed, just craped out!

oh btw my saginaw 3speed, 3rd gear syncro went out 2 days ago too. I'll be fixing it though
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Old 06-23-2012, 11:31 AM   #10
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Re: help with my 3 speed, just craped out!

thanks ! guys ! for alll the help.... im out the door to thr junk yard
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Old 06-25-2012, 12:44 PM   #11
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Re: help with my 3 speed, just craped out!

I want to say THANKS!!! to thekid54 for letting me get his old 3 speed for a good price! i hope to install the new 3 speed this week.... thanks again guys for all the help
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Old 06-25-2012, 01:04 PM   #12
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Re: help with my 3 speed, just craped out!



cant wait to get this thing back on the road!
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Old 06-25-2012, 05:18 PM   #13
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Re: help with my 3 speed, just craped out!

Nice Pics Malex. Do you have all three seats and how about some engine shots?
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Old 07-01-2012, 04:29 PM   #14
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Re: help with my 3 speed, just craped out!

well guys i tryied to swap out my 3speed yesterday only to find out the new one wont work!.... oh well :/







the last pic is of the new 3speed that wont work on my 62sub..

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Old 07-01-2012, 05:18 PM   #15
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Re: help with my 3 speed, just craped out!

different rear spline?
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Old 07-01-2012, 07:56 PM   #16
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Arrow Re: help with my 3 speed, just craped out!

Here is some Info:

3-Speed Transmissions

GMC used the The SM-318 as the standard 3-speed tranmission in GMC series 1000 & 1500 trucks.
In 1963 they also offered the New Process 746G as a Heavy Duty option for 1000, 1500, K1000 & K1500 Series trucks.
In 1964 the Warner T-89B was offered as an option for P/PB1000, P/PB1500 & P/PB2500 series chassis.

Transmission Adapters
GMC V6 Adapter
http://www.6066gmcguy.org/SM420.htm

http://67-72chevytrucks.com/vboard/s...d.php?t=327764
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Old 07-01-2012, 09:07 PM   #17
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Re: help with my 3 speed, just craped out!

I have the 305 v6. I replaced my whiny saginaw with a Muncie 3 spd floor shifter, had to cut out a hole in the floor cover for it to work and change out the yoke for it to work. Bolted right up. I believe it came out of a Chevelle and before that, it was bolted to the back of a 305 v8. Bellhousings should be mostly the same. Input shaft is much more stout on the Muncie, and overall a way stronger tranny.
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Old 07-01-2012, 10:23 PM   #18
NCD1966
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Re: help with my 3 speed, just craped out!

man sorry it didnt work out.

my 3 speed just crapped out on me today. I lost 3rd gear synco a few weeks ago. but I wanted to drive it today. well I was in 3rd then had to down shift to second and I had nothing in both 2nd and 3rd so i tried 1st and it jammed up.. I blame the truck sitting for over 2 years.

oh well I have a 3speed od that Ive been needing to put in anyways.
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1990 Chevy Suburban 350 tbi 2x4 (sold)
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Old 07-05-2012, 01:03 AM   #19
malex 62sub
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Re: help with my 3 speed, just craped out!

well friends i got my trans swapped out today ... my 62 is back on the road!!!





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