Tranny ID help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Virginian · 04-10-2016, 08:56 AM

I am trying to find out what model and year my 3 speed in my 55 is. It is not the original trans. I know it is a muncie by comparing it with pictures on the net. casting number on right side of case is 3911982, the last 3 might be 882 the eight and nine look about the same. Any body out there got any books on these?

dwcsr · 04-10-2016, 11:37 AM

post a picture of the whole trans

OrrieG · 04-10-2016, 02:09 PM

C 17 ? March 17 of what ever year the last digit is, should be 5 if original to the truck.

Virginian · 04-10-2016, 02:41 PM

Quote:

Originally Posted by OrrieG

C 17 ? March 17 of what ever year the last digit is, should be 5 if original to the truck.

Posted via Mobile Device

**mr48chev** · 04-10-2016, 03:12 PM

3 speed ? 4 Speed or ?

If a 3 speed how many bolts on the side cover?

I did find reference to that casting number but no real info on it.

Virginian · 04-10-2016, 04:40 PM

more pictures,best I could get laying under truck last number of date code seems to be an 8 it is a 3 speed.

dwcsr · 04-10-2016, 04:57 PM

Its a Mid 60's Saginaw HD 3 speed. They used it behind 396 and others of that era in Camaro's and chevelles

Virginian · 04-10-2016, 07:40 PM

OK thank you I need to find some parts and this helps

OrrieG · 04-11-2016, 12:37 AM

I have not been able to find that PN, but the 8 could indicate 1968 or 58. I did find that in 1966 1st gear became synchronized so you could shift into first gear without double clutching or coming to a complete stop. If it is the HD model will have an 1.125" input shaft. Stout unit, used in roundy car racing.

1project2many · 04-11-2016, 11:04 AM

Quote:

Its a Mid 60's Saginaw HD 3 speed. They used it behind 396 and others of that era in Camaro's and chevelles

I don't know if anything's changed, but those transmissions were tough to find parts for back in the '80s. I'm thinking it will be tougher now...

**mr48chev** · 04-11-2016, 01:02 PM

Good thing is they don't need parts too often unless you really abuse them. I've got one in my 48 that has been trouble free for a lot of miles.

solidaxel · 04-11-2016, 03:27 PM

If 1st gear is syncroed it is worth fixing

Virginian · 04-11-2016, 05:29 PM

yes first gear is syncro, I really only need the speedo drive gear and shifter shaft seals I might crawl around under it tonight and look for more numbers

1project2many · 04-11-2016, 07:43 PM

Those parts shouldn't be too hard to find. IIRC they're similar to Saginaw 4 spd parts.

Janky59 · 04-12-2016, 03:50 PM

I'd try Garage Motorsports, Vancouver, WA for your parts. They have a lot of trans. parts, ask for a guy named Mike, very helpful and knowledgeable. Web search their name and it will come right up. Good Luck.

Russell Ashley · 04-13-2016, 01:13 PM

This is a great forum. I can't offer any assistance but did get one of my questions answered. It looks like you can use a transmission like this where there is no rear mount. I want to find an all syncro three speed but was concerned about only mounting it with the four bolts in the front. It looks like that is how Virginian's is mounted so apparently it is OK to do it. Excuse the "sidetrack".

solidaxel · 04-14-2016, 12:20 AM

A cast iron case & cast iron bell housing will work with the four bolts on the case
My Tremac is mounted to a cast iron bell housing with just the 4 case bolts

Russell Ashley · 04-14-2016, 06:22 PM

Thanks for the info, I was hoping that was the answer.

04-10-2016, 08:56 AM	#1
Virginian Registered User Join Date: Aug 2015 Location: Virginia Posts: 35	Tranny ID help I am trying to find out what model and year my 3 speed in my 55 is. It is not the original trans. I know it is a muncie by comparing it with pictures on the net. casting number on right side of case is 3911982, the last 3 might be 882 the eight and nine look about the same. Any body out there got any books on these? Attached Images

04-10-2016, 11:37 AM	#2
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: Tranny ID help post a picture of the whole trans

04-10-2016, 02:09 PM	#3
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: Tranny ID help C 17 ? March 17 of what ever year the last digit is, should be 5 if original to the truck. __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project

04-10-2016, 03:12 PM	#5
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,719	Re: Tranny ID help 3 speed ? 4 Speed or ? If a 3 speed how many bolts on the side cover? I did find reference to that casting number but no real info on it. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

04-10-2016, 04:40 PM	#6
Virginian Registered User Join Date: Aug 2015 Location: Virginia Posts: 35	Re: Tranny ID help more pictures,best I could get laying under truck last number of date code seems to be an 8 it is a 3 speed. Attached Images

04-10-2016, 04:57 PM	#7
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: Tranny ID help Its a Mid 60's Saginaw HD 3 speed. They used it behind 396 and others of that era in Camaro's and chevelles

04-10-2016, 07:40 PM	#8
Virginian Registered User Join Date: Aug 2015 Location: Virginia Posts: 35	Re: Tranny ID help OK thank you I need to find some parts and this helps

04-11-2016, 12:37 AM	#9
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: Tranny ID help I have not been able to find that PN, but the 8 could indicate 1968 or 58. I did find that in 1966 1st gear became synchronized so you could shift into first gear without double clutching or coming to a complete stop. If it is the HD model will have an 1.125" input shaft. Stout unit, used in roundy car racing. __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project

04-11-2016, 01:02 PM	#11
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,719	Re: Tranny ID help Good thing is they don't need parts too often unless you really abuse them. I've got one in my 48 that has been trouble free for a lot of miles. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

04-11-2016, 03:27 PM	#12
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: Tranny ID help If 1st gear is syncroed it is worth fixing __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

04-11-2016, 05:29 PM	#13
Virginian Registered User Join Date: Aug 2015 Location: Virginia Posts: 35	Re: Tranny ID help yes first gear is syncro, I really only need the speedo drive gear and shifter shaft seals I might crawl around under it tonight and look for more numbers

04-11-2016, 07:43 PM	#14
1project2many Registered User Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,204	Re: Tranny ID help Those parts shouldn't be too hard to find. IIRC they're similar to Saginaw 4 spd parts.

04-12-2016, 03:50 PM	#15
Janky59 Registered User Join Date: Feb 2015 Location: Salisbury, MD Posts: 91	Re: Tranny ID help I'd try Garage Motorsports, Vancouver, WA for your parts. They have a lot of trans. parts, ask for a guy named Mike, very helpful and knowledgeable. Web search their name and it will come right up. Good Luck. __________________ 2018 BMW R1200RT 2013 Aprilia Tuono 2012 Ford Flex 2011 Ducati Hypermotard 1959 Chevy 3100

04-13-2016, 01:13 PM	#16
Russell Ashley Registered User Join Date: May 2010 Location: Lawrenceville, Ga Posts: 2,648	Re: Tranny ID help This is a great forum. I can't offer any assistance but did get one of my questions answered. It looks like you can use a transmission like this where there is no rear mount. I want to find an all syncro three speed but was concerned about only mounting it with the four bolts in the front. It looks like that is how Virginian's is mounted so apparently it is OK to do it. Excuse the "sidetrack".

04-14-2016, 12:20 AM	#17
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: Tranny ID help A cast iron case & cast iron bell housing will work with the four bolts on the case My Tremac is mounted to a cast iron bell housing with just the 4 case bolts __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42



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04-14-2016, 06:22 PM	#18
Russell Ashley Registered User Join Date: May 2010 Location: Lawrenceville, Ga Posts: 2,648	Re: Tranny ID help Thanks for the info, I was hoping that was the answer.

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