3 speed Saginaw 'Kaput' - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jdhcth · 11-01-2006, 09:48 AM

I have a 67' LWB with a 283 and a Saginaw 3 speed on the column. The tranny is trashed and I was thinkin' about upgrading. Any suggestions? Will a Muncie or Saginaw 4 speed, floor shift, fit in my truck without modin' my driveshaft length? My recent engine rebuild doubled the horses and I want the tran to be able to withstand the punishment.

Thanks,

JD

pkj · 11-01-2006, 09:54 AM

i have 68 that i changed out to a muncie. i only had to change 2 bolts on bottom of bellhousing to trans. nothing else. but i think the 67 bellhousing is differnent. i am sure somebody will jump in on that. 4 on the floor is the way to go. good luck. pkj

crazy longhorn · 11-01-2006, 01:44 PM

The only difference in the 67/68 bells are the center hole size, 68 up is 5 1/8" on the truck, & 67 on back is 4 11/16" (same as the car trans you will be installing)! you will need to bolt & nut the bottom 2 holes on the trans,as the truck bell does not have threadded holes in the bottom. The 4 spd saginaw is a direct bolt in replacement for the 3 spd that you are running, as well as the m20/21 muncie......altho some of the muncies have a 26 spline input shaft, vs the 10 spline in your truck, requiring a clutch disc swap. Best of luck,

L

Ole Blue 68 · 11-01-2006, 02:30 PM

I'm no Trans expert but go with a Muncie.

shifty · 11-01-2006, 02:39 PM

I have a replacement 3spd saginaw from a '69 (synchronized) that has been peacefully resting in my basement since I started my swap if you just end up replacing it. It was rebuilt a few months before the swap and is in exceptional shape. You'd probably want to pick it up though, because it ain't worth the shipping cost to get it up to ya.

Expect to pay at least $400 for a muncie 4spd. in good shape (I shopped around a lot thinking about the upgrade).

jdhcth · 11-03-2006, 12:49 PM

Thanks guys. After checking around I'm gonna rebuild the 3 sp Saginaw. Heard it wasn't too hard to do. Never done that before, so like the engine rebuild I did, it will be a learning experience. I think it can handle the extra horses. I do want to put a 3sp floor shifter in however.

JD

Jim_PA · 11-03-2006, 01:11 PM

Don't forget about the super t-10 4 speeds. Better ratios, and they were used in the 70's and 80's, so the stockpile is a little more fresh - not to mention cheaper because it isn't called a muncie.

11-01-2006, 09:48 AM	#1
jdhcth Registered User Join Date: Dec 2005 Location: Houston, TX Posts: 51	3 speed Saginaw 'Kaput' I have a 67' LWB with a 283 and a Saginaw 3 speed on the column. The tranny is trashed and I was thinkin' about upgrading. Any suggestions? Will a Muncie or Saginaw 4 speed, floor shift, fit in my truck without modin' my driveshaft length? My recent engine rebuild doubled the horses and I want the tran to be able to withstand the punishment. Thanks, JD

11-01-2006, 09:54 AM	#2
pkj Senior Member Join Date: Jun 2006 Location: waycross ga. Posts: 438	Re: 3 speed Saginaw 'Kaput' i have 68 that i changed out to a muncie. i only had to change 2 bolts on bottom of bellhousing to trans. nothing else. but i think the 67 bellhousing is differnent. i am sure somebody will jump in on that. 4 on the floor is the way to go. good luck. pkj

11-01-2006, 01:44 PM	#3
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	Re: 3 speed Saginaw 'Kaput' The only difference in the 67/68 bells are the center hole size, 68 up is 5 1/8" on the truck, & 67 on back is 4 11/16" (same as the car trans you will be installing)! you will need to bolt & nut the bottom 2 holes on the trans,as the truck bell does not have threadded holes in the bottom. The 4 spd saginaw is a direct bolt in replacement for the 3 spd that you are running, as well as the m20/21 muncie......altho some of the muncies have a 26 spline input shaft, vs the 10 spline in your truck, requiring a clutch disc swap. Best of luck, L __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

11-01-2006, 02:30 PM	#4
Ole Blue 68 Registered User Join Date: Aug 2005 Location: Philly Posts: 1,140	Re: 3 speed Saginaw 'Kaput' I'm no Trans expert but go with a Muncie.

11-01-2006, 02:39 PM	#5
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Re: 3 speed Saginaw 'Kaput' I have a replacement 3spd saginaw from a '69 (synchronized) that has been peacefully resting in my basement since I started my swap if you just end up replacing it. It was rebuilt a few months before the swap and is in exceptional shape. You'd probably want to pick it up though, because it ain't worth the shipping cost to get it up to ya. Expect to pay at least $400 for a muncie 4spd. in good shape (I shopped around a lot thinking about the upgrade). __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

11-03-2006, 12:49 PM	#6
jdhcth Registered User Join Date: Dec 2005 Location: Houston, TX Posts: 51	Re: 3 speed Saginaw 'Kaput' Thanks guys. After checking around I'm gonna rebuild the 3 sp Saginaw. Heard it wasn't too hard to do. Never done that before, so like the engine rebuild I did, it will be a learning experience. I think it can handle the extra horses. I do want to put a 3sp floor shifter in however. JD

11-03-2006, 01:11 PM	#7
Jim_PA Registered User Join Date: May 2005 Location: PA Posts: 2,696	Re: 3 speed Saginaw 'Kaput' Don't forget about the super t-10 4 speeds. Better ratios, and they were used in the 70's and 80's, so the stockpile is a little more fresh - not to mention cheaper because it isn't called a muncie.



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