Which transmissions do I have? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**passthebuck** · 04-18-2004, 09:42 PM

See the two attached pics. My red 67 has one tranny & my green 67 has another. Both came with the big (11") clutch, coil rear end & helper leafs. In my 67 overhaul manual, only the first tranny is diagramed. Which is which? Which is better? Did someone swap out the factory tranny for another? The first pic is in the red 67 & its the one in the overhaul manual. What about the second pic? Thanks to all for your help.

**passthebuck** · 04-18-2004, 09:44 PM

green 67 tranny

*Robo_bot* · 04-18-2004, 10:44 PM

looks like a 3spd tranny to me for a 3 in the tree application

1969 GMC · 04-19-2004, 02:14 AM

in my '69 service manual, it lists two different three speeds...the SM326 and SM330. other than that, I don't know the difference.

I would think the SM330 is stronger, as it never had O/D (the SM326 did), plus the SM330 was the only 3 spd used in 4x4 applications.

**passthebuck** · 04-19-2004, 09:47 AM

ttt

dubie · 04-19-2004, 11:15 AM

hehe all I can tell you is they are both Saginaw 3 speeds. not sure on the model # tho

**CPNE** · 04-19-2004, 01:38 PM

Count the bolts on the shift fork cover of each. The pre-69 tranny which would have been installed in both trucks from the factory has 4 bolts on the cover. It is a non-synchro'd 3 speed and is shorter thant the 69-up one. The 69-up 3 speed tranny will have 7 bolts on the cover and is syncho'd. It also has a much longer tailshaft.

If your red one has 4 bolts and your green one 7, someone swapped in the later style tranny. I prefer the later style simply because you can shift into first without grinding the gears.

Warbones · 04-19-2004, 03:34 PM

Again some good information that i will be cutting and pasting in wordpad for future referance. Along with climbing under my truck to see my tranny and count the bolts.

04-18-2004, 09:42 PM	#1
passthebuck Sisyphus was my mentor! Join Date: Sep 2002 Location: Carleton Place, Ontario CANADA Posts: 984	Which transmissions do I have? See the two attached pics. My red 67 has one tranny & my green 67 has another. Both came with the big (11") clutch, coil rear end & helper leafs. In my 67 overhaul manual, only the first tranny is diagramed. Which is which? Which is better? Did someone swap out the factory tranny for another? The first pic is in the red 67 & its the one in the overhaul manual. What about the second pic? Thanks to all for your help. __________________ passthebuck #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car

04-18-2004, 09:44 PM	#2
passthebuck Sisyphus was my mentor! Join Date: Sep 2002 Location: Carleton Place, Ontario CANADA Posts: 984	second pic... green 67 tranny __________________ passthebuck #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car

04-19-2004, 02:14 AM	#4
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	in my '69 service manual, it lists two different three speeds...the SM326 and SM330. other than that, I don't know the difference. I would think the SM330 is stronger, as it never had O/D (the SM326 did), plus the SM330 was the only 3 spd used in 4x4 applications. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

04-19-2004, 09:47 AM	#5
passthebuck Sisyphus was my mentor! Join Date: Sep 2002 Location: Carleton Place, Ontario CANADA Posts: 984	ttt __________________ passthebuck #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car

04-19-2004, 11:15 AM	#6
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	hehe all I can tell you is they are both Saginaw 3 speeds. not sure on the model # tho __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

04-18-2004, 10:44 PM	#3
Robo_bot Account Suspended Join Date: Feb 2004 Location: Kelowna BC Canada Posts: 481	looks like a 3spd tranny to me for a 3 in the tree application

04-19-2004, 01:38 PM	#7
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,664	Count the bolts on the shift fork cover of each. The pre-69 tranny which would have been installed in both trucks from the factory has 4 bolts on the cover. It is a non-synchro'd 3 speed and is shorter thant the 69-up one. The 69-up 3 speed tranny will have 7 bolts on the cover and is syncho'd. It also has a much longer tailshaft. If your red one has 4 bolts and your green one 7, someone swapped in the later style tranny. I prefer the later style simply because you can shift into first without grinding the gears. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

04-19-2004, 03:34 PM	#8
Warbones Navel Inspector Join Date: Mar 2003 Location: Wichita, Ks Posts: 1,373	Again some good information that i will be cutting and pasting in wordpad for future referance. Along with climbing under my truck to see my tranny and count the bolts. __________________ 1948 Chevy Aerosedan GONE! I think. 1984 Cadillac Fleetwood Brougham Coupe WANTED 1967 IMPALA 1967 CST C10 Long Bed with a 283



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