Car 4 speed? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rivernut · 09-12-2005, 09:32 AM

Ok, Dumb question of the day. Can a regular muncie or gm 4 speed from early camaro's, chevelle's, nova's, be made to fit in 2 wd trucks. Thinking about that with a 402 in my 72. Thanks.
Ps. modifying mounting brackets isn't a big deal for me, if needed. Also has it been done (I'm sure it has to have been with this bunch) and are there any pictures.
Rivernut

gr8scott51 · 09-12-2005, 10:06 AM

Anything will fit if you use a big enough hammer.

The shifter will be in the middle of your bench seat. Got bucket seats? I'm sure someone makes a relocator for the linkage. That's why most truck manual transmissions are top loaders.

chevyguy_72 · 09-12-2005, 10:10 AM

I use to have a camaro 4 spd in the truck. It is not Heavy Duty enough to handle the weight. I went through 3 of them before i went back to a TH350.
It fit fine. Might have to adjust the length of the drive shaft.

**1970 CST Short Wide** · 09-12-2005, 03:35 PM

We have a Muncie M22 behind GM's 290 HP crate motor in my sons truck and its lots of fun. Using the Mr. Gasket Truck shifter, thereâ€™s no problem hitting the seat; however we do have the buddy buckets.

acloco · 09-12-2005, 05:10 PM

Any of th M20 (LARGE counter shaft shaft -...no..did not stutter - heavy duty has 1" counter shaft shaft), M21, or M22. Or...T10's will work. Avoid Saginaws...for anything with HP or torque...you will tear them up.

Hurst has a competition Plus shifter that works with a bench seat....with no problems.

pissonNOS · 09-12-2005, 07:42 PM

Quote:

Originally Posted by acloco

Any of th M20 (LARGE counter shaft shaft -...no..did not stutter - heavy duty has 1" counter shaft shaft), M21, or M22. Or...T10's will work. Avoid Saginaws...for anything with HP or torque...you will tear them up.

Hurst has a competition Plus shifter that works with a bench seat....with no problems.

I agree about the saginaw statement i had mine in my 307 and i just put another one in, but I absolutely bagged on the first one I had and it only failed because I tried doing a reverse burnout and broke a bunch of ****. But ya the conversion is really and i used the hurst shifter and it works great with a bench seat.
Jason

KEH · 09-12-2005, 10:13 PM

Yes, avoid the Saginaw. I have had mine rebuilt twice and it has gone down again.

A buddy was just telling me that years ago he mounted a 3 speed overdrive tail housing to a 4 speed and made a 4 speed overdrive. I have not heard of that, but it sounds like a good deal. Anyone done that?

68C15 · 09-12-2005, 10:31 PM

Quote:

Originally Posted by KEH

A buddy was just telling me that years ago he mounted a 3 speed overdrive tail housing to a 4 speed and made a 4 speed overdrive. I have not heard of that, but it sounds like a good deal. Anyone done that?

HEY, that sounds like the perfect combination for my stepside with the caddy mill. any info guys?

acloco · 09-12-2005, 10:38 PM

Quote:

Originally Posted by 68C15

HEY, that sounds like the perfect combination for my stepside with the caddy mill. any info guys?

The overdrive is extremely on the thin side of life. Definitely will NOT hold up to a Caddy mill with all that torque. In fact, they were never installed, from the factory, in anything bigger than a 283. Sorry dude.

pissonNOS · 09-12-2005, 10:58 PM

Quote:

Originally Posted by KEH

Yes, avoid the Saginaw. I have had mine rebuilt twice and it has gone down again.

A buddy was just telling me that years ago he mounted a 3 speed overdrive tail housing to a 4 speed and made a 4 speed overdrive. I have not heard of that, but it sounds like a good deal. Anyone done that?

just wondering if you could tell me where he got this rebuilt and what parts were replaced because when I tried to rebuild my last saginaw I was told there is no such thing as hard parts for these saginaws anymore, so I had to buy a rebuilt one that was done about 5 years ago. Sorry for hijacking your thread also
Jason

**Boog** · 09-12-2005, 07:35 PM

You'd be surprised how the Muncies just bolt right in. I put a Muncie close ratio 4 speed in my 78 Chevy truck that came from a 69 SS Nova. Bolted right in, input and output shafts were of the same size and spline counts as the stock truck 3 speed so the clutch and driveshaft yoke were correct. Tranny length was the same. I had mine swapped out in under 2 hours including cutting the hole in the floor for the shifter. Drove that one like that for 6 years.

acloco · 09-12-2005, 11:09 PM

They are around...just have to find a shop that specializes in manual transmissions.

gears4less? Something like that.

Ask the companies that rebuild larger truck manual trans....they have the info.

jimfulco · 09-12-2005, 11:45 PM

Saginaw overdrive conversion:
http://www.chevytrucks.org/tech/overdrive.htm

A few hard parts, along with rebuild stuff & ID info can be found at
http://www.dandltransmission.com/saginaw.html
or you might find something at www.kajunjon.com

jhwkns · 09-13-2005, 12:11 AM

I've had good luck with my Saginaw four speed. Saginaw parts

09-12-2005, 09:32 AM	#1
rivernut Registered User Join Date: Jun 2005 Location: guttenberg, iowa Posts: 38	Car 4 speed? Ok, Dumb question of the day. Can a regular muncie or gm 4 speed from early camaro's, chevelle's, nova's, be made to fit in 2 wd trucks. Thinking about that with a 402 in my 72. Thanks. Ps. modifying mounting brackets isn't a big deal for me, if needed. Also has it been done (I'm sure it has to have been with this bunch) and are there any pictures. Rivernut __________________ '72 1/2 ton 350 auto

09-12-2005, 10:06 AM	#2
gr8scott51 Registered User Join Date: Mar 2003 Location: Bremerton, WA Posts: 1,839	Anything will fit if you use a big enough hammer. The shifter will be in the middle of your bench seat. Got bucket seats? I'm sure someone makes a relocator for the linkage. That's why most truck manual transmissions are top loaders. __________________ Silence is golden, duct tape is silver. - Scott

09-12-2005, 10:10 AM	#3
chevyguy_72 Vintage Evil Join Date: Aug 2005 Location: Broomfield, CO Posts: 956	I use to have a camaro 4 spd in the truck. It is not Heavy Duty enough to handle the weight. I went through 3 of them before i went back to a TH350. It fit fine. Might have to adjust the length of the drive shaft. __________________ Current Rides: Vintage Evil - 72 Chevy C10 (Always a work in progress) Vintage Evil Build Thread EvilK5 - 71 K5 Blazer Evil Twin - 2006 Suzuki M109R EvilDmax- 2018 GMC 2500 Denali Duramax

09-12-2005, 03:35 PM	#4
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,165	We have a Muncie M22 behind GM's 290 HP crate motor in my sons truck and its lots of fun. Using the Mr. Gasket Truck shifter, thereâ€™s no problem hitting the seat; however we do have the buddy buckets. __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 Last edited by 1970 CST Short Wide; 09-12-2005 at 03:36 PM.

09-12-2005, 10:13 PM	#7
KEH Better late than never Join Date: Dec 2001 Location: Columbus, IN Posts: 324	Yes, avoid the Saginaw. I have had mine rebuilt twice and it has gone down again. A buddy was just telling me that years ago he mounted a 3 speed overdrive tail housing to a 4 speed and made a 4 speed overdrive. I have not heard of that, but it sounds like a good deal. Anyone done that? __________________ 1970 C/10 SWB Stepside

09-12-2005, 05:10 PM	#5
acloco Registered User Join Date: Apr 2004 Location: Nebraska Posts: 335	Any of th M20 (LARGE counter shaft shaft -...no..did not stutter - heavy duty has 1" counter shaft shaft), M21, or M22. Or...T10's will work. Avoid Saginaws...for anything with HP or torque...you will tear them up. Hurst has a competition Plus shifter that works with a bench seat....with no problems.

09-12-2005, 07:35 PM	#11
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,452	You'd be surprised how the Muncies just bolt right in. I put a Muncie close ratio 4 speed in my 78 Chevy truck that came from a 69 SS Nova. Bolted right in, input and output shafts were of the same size and spline counts as the stock truck 3 speed so the clutch and driveshaft yoke were correct. Tranny length was the same. I had mine swapped out in under 2 hours including cutting the hole in the floor for the shifter. Drove that one like that for 6 years. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross Last edited by Boog; 09-12-2005 at 07:37 PM.

09-12-2005, 11:09 PM	#12
acloco Registered User Join Date: Apr 2004 Location: Nebraska Posts: 335	They are around...just have to find a shop that specializes in manual transmissions. gears4less? Something like that. Ask the companies that rebuild larger truck manual trans....they have the info.

09-12-2005, 11:45 PM	#13
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	Saginaw overdrive conversion: http://www.chevytrucks.org/tech/overdrive.htm A few hard parts, along with rebuild stuff & ID info can be found at http://www.dandltransmission.com/saginaw.html or you might find something at www.kajunjon.com Last edited by jimfulco; 09-12-2005 at 11:50 PM.

09-13-2005, 12:11 AM	#14
jhwkns Registered Cruiser Join Date: May 2002 Location: Las Vegas NV Posts: 2,230	I've had good luck with my Saginaw four speed. Saginaw parts __________________ I intend to live forever. So far, so good.



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