granny SM465 to Muncie m22(etc) SWAP ?'s - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dmartin1 · 01-16-2013, 04:52 PM

my trucks got a very mild 355, and the sm465 is crap lol.i hate it so much.
I would love to throw in a 4 speed muncie.
now,

To perform the swap from the current sm465 with a granny low to the muncie 4 speed, what will need to be done?
any parts needed?

From pics, it looks like it would almost bolt up to the sm465 bell housing?

any info and help would be great. ive tried searching, but the very few threads i found were auto to muncie swaps etc.

1982 stepside shortbed

68Timber · 01-16-2013, 05:05 PM

I think it moves the shifter location back.

FritzA · 01-16-2013, 09:32 PM

It bolts right in.

As Bruiser said, it may move the shifter back a little. Not a major issue if you are not afraid to enlarge the shifter hole a bit.

You may also need the driveshaft shortened. Not a major issue and will probably cost less than $100.

INSIDIOUS '86 · 01-16-2013, 10:16 PM

They use the same clutch spline?
Posted via Mobile Device

86c20 · 01-16-2013, 10:58 PM

i thik they are both 10 splin

DesertCat · 01-16-2013, 11:22 PM

Quote:

Originally Posted by FritzA

It bolts right in.

As Bruiser said, it may move the shifter back a little. Not a major issue if you are not afraid to enlarge the shifter hole a bit.

You may also need the driveshaft shortened. Not a major issue and will probably cost less than $100.

Well, kind of. What I have found out so far (doing a TH350 to M20 myself) is that the hole for the input bearing is too big. Not to worry, there are adapters available (I think McLeod) or you can have a local machine shop whip one up.

Had a drive shaft shortened and balanced by Phoenix Driveline or maybe it was called AZ Driveline... whatever... $75 last year.

Check out 5speeds.com for lots of good info on the Muncie, casting numbers, ratios, etc.

Not affiliated to any of the above BTW, good luck

wraprail · 01-17-2013, 07:18 PM

You need to change the bellhousing to a chevrolet car or aftermarket. As stated above the hole is larger on the truck bellhousing. Although the m22 ( or any other GM car transmission) will bolt on to the truck bellhousing it won't align properly. I know first hand. My M21 lasted 1 week bolted to a truck bellhousing before I found out the hard $ way. As stated above, driveshaft hole in floor will change. Clutch is same.
I'm thinking S10 with T5,4.3 bellhousing should be a bolt on cheap option if you have(or want) hydro clutch. You may need a 153? tooth flywheel? if you use the S10 bellhousing. not sure. Lots of them in wrecking yards
Posted via Mobile Device

thesickc10 · 01-17-2013, 07:44 PM

I dont know the dimensions of a m22 but my super10 bolted right on to the stock cross member without having to move it. I went from th350 to super t10 with a scatter shield. not sure if the shifters are in the same spot, but if they are ill send you measurements where to cut the hole in the floor.

01-16-2013, 04:52 PM	#1
dmartin1 Registered User Join Date: Aug 2008 Location: mohave valley,arizona Posts: 1,088	granny SM465 to Muncie m22(etc) SWAP ?'s my trucks got a very mild 355, and the sm465 is crap lol.i hate it so much. I would love to throw in a 4 speed muncie. now, To perform the swap from the current sm465 with a granny low to the muncie 4 speed, what will need to be done? any parts needed? From pics, it looks like it would almost bolt up to the sm465 bell housing? any info and help would be great. ive tried searching, but the very few threads i found were auto to muncie swaps etc. 1982 stepside shortbed __________________ 1969 Shortbed in progress 1982 short step, few suspension and motor upgrades.getting a 468 1978 Shortbed fleet side bonanza fully loaded 1978 k20 Silverado loaded.currently engine-less 1989 k10 suburban 9" lift 65 nova And more

01-16-2013, 05:05 PM	#2
68Timber I know the pieces fit Join Date: Nov 2007 Location: MONTGOMERY, AL Posts: 5,523	Re: granny SM465 to Muncie m22(etc) SWAP ?'s I think it moves the shifter location back. __________________ John 79 2wd Blazer (Bruiser) 85 M1009 Blazer (Sarge) build 74 Honda Z50 build

01-16-2013, 09:32 PM	#3
FritzA Registered User Join Date: Jul 2009 Location: Denver Burbs, CO Posts: 115	Re: granny SM465 to Muncie m22(etc) SWAP ?'s It bolts right in. As Bruiser said, it may move the shifter back a little. Not a major issue if you are not afraid to enlarge the shifter hole a bit. You may also need the driveshaft shortened. Not a major issue and will probably cost less than $100.

01-16-2013, 10:16 PM	#4
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: granny SM465 to Muncie m22(etc) SWAP ?'s They use the same clutch spline? Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

01-16-2013, 10:58 PM	#5
86c20 Registered User Join Date: Mar 2012 Location: edgartown mass Posts: 852	Re: granny SM465 to Muncie m22(etc) SWAP ?'s i thik they are both 10 splin __________________ 1986 c20 "the hillbilly" 350 sm465 3.42gears 21mpg at 70mph 1985 k30 "the ice cream truck from hell" no rust az truck 197-8??? c30 "ramp truck" 454 1978 monte carlo 350 350th with 2.73 gears. no rust. sc car

01-17-2013, 07:18 PM	#7
wraprail Registered User Join Date: Sep 2010 Location: Lake Havasu City Arizona Posts: 863	Re: granny SM465 to Muncie m22(etc) SWAP ?'s You need to change the bellhousing to a chevrolet car or aftermarket. As stated above the hole is larger on the truck bellhousing. Although the m22 ( or any other GM car transmission) will bolt on to the truck bellhousing it won't align properly. I know first hand. My M21 lasted 1 week bolted to a truck bellhousing before I found out the hard $ way. As stated above, driveshaft hole in floor will change. Clutch is same. I'm thinking S10 with T5,4.3 bellhousing should be a bolt on cheap option if you have(or want) hydro clutch. You may need a 153? tooth flywheel? if you use the S10 bellhousing. not sure. Lots of them in wrecking yards Posted via Mobile Device Last edited by wraprail; 01-17-2013 at 07:26 PM.

01-17-2013, 07:44 PM	#8
thesickc10 Registered User Join Date: Sep 2010 Location: New Hope, PA Posts: 279	Re: granny SM465 to Muncie m22(etc) SWAP ?'s I dont know the dimensions of a m22 but my super10 bolted right on to the stock cross member without having to move it. I went from th350 to super t10 with a scatter shield. not sure if the shifters are in the same spot, but if they are ill send you measurements where to cut the hole in the floor. __________________ 1985 c10 355 th350 (working on 4 speed conversion to super t10) 1979 camaro 358 super t10 2003 f250 superchip slp exhaust



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