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Username Post: Bellhousing Question        (Topic#81577)
john57 
Member
Posts: 9

Reg: 11-20-04
11-20-04 09:56 PM - Post#556979    

New member here. I just bought a 70 C/10 Stepside with a six cylinder and three on the tree.Where is a good source for body and chassis parts. Back to my question, will the bellhousing from the six fit a small block chevy motor. The reason I'm asking is the bellhousing has mounts right on it that bolt to the cross member. I have a fresh 350 I'd like to install. Thanks for your help. John

 
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longhorn_man 
Very Senior Member
Posts: 1931

Age: 40
Loc: Columbus Ohio
Reg: 02-02-02
Re: Bellhousing Question
11-21-04 04:45 AM - Post#556980    
    In response to john57

Yup, it'll bolt right up.
1972 C/10 burb, 68 nose, SLAMMED... 402/TH400/3.07 <--- Chicks dig it!
1970 C/30 Longhorn, GMC nose...Caddy 425/TH350/4.10 one of 1404 built
www.longhorntrucks.freeservers.com


 
zenish 
Very Senior Member
Posts: 1422

Loc: stallings,nc
Reg: 01-03-01
Re: Bellhousing Question
11-21-04 11:40 AM - Post#556981    
    In response to john57

for parts click the "links" above.
1962 ford econoline van
1989 rs convertible
2007 majesty


 
raycow 
Honored Member
Posts: 18713

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
Re: Bellhousing Question
11-21-04 11:56 AM - Post#556982    
    In response to zenish

Not only the bellhousing, but the flywheel too, if your 350 is 85 or older.

Ray

 
john57 
Member
Posts: 9

Reg: 11-20-04
Re: Bellhousing Question
11-21-04 01:07 PM - Post#556983    
    In response to raycow

Thanks guy's, so flywheel and bellhousing will fit? Thats great. Do I need to change the towers bolted to the frame? Will any 4spd car trans bolt to the bellhousing? Thanks again. John

 
good.wrench 
Chevytalk Staff
Posts: 20079
good.wrench
Loc: new york,usa
Reg: 03-30-01
Re: Bellhousing Question
11-21-04 02:59 PM - Post#556984    
    In response to john57

not any or every car fourspeed will bolt up to the bell housing,there is a difference in the hole size where the front cover goes into the tranny,some members have run into different sizes and the tranny would not go in all the way,you need to measure.talk to dennis valentine the moderator here,he might know exactly which tranny will fit and which ones will not.

good.wrench
c/t staff
84 S-1O 4x4 if your poor your crazy,if your rich your eccentric!


 
dvalentine 
Senior Member
Posts: 9355

Loc: Sacramento, CA
Reg: 06-22-00
Re: Bellhousing Question
11-21-04 08:30 PM - Post#556985    
    In response to good.wrench

Quote:

talk to dennis valentine the moderator here,he might know exactly which tranny will fit and which ones will not.




The Longhorn Guy has my back.

Since you were asking about the bellhousing, I'll assume that you want to use the trans that you have in there already.

DV


 
john57 
Member
Posts: 9

Reg: 11-20-04
Re: Bellhousing Question
11-22-04 03:20 AM - Post#556986    
    In response to dvalentine

I would really like to change to a four spd if I can find out with ones will fit. Are the four mounting holes pretty much the same dimensions? Can the center hole be machined out? Thanks John

 
dvalentine 
Senior Member
Posts: 9355

Loc: Sacramento, CA
Reg: 06-22-00
Re: Bellhousing Question
11-22-04 07:43 AM - Post#556987    
    In response to john57

The Trans mount points are the same on the bellhousing for both the 3 speed and 4 speed.

DV

 
raycow 
Honored Member
Posts: 18713

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
Re: Bellhousing Question
11-22-04 06:46 PM - Post#556988    
    In response to john57

The truck and car transmissions share the same bolt pattern from 55 on. However, the register hole in some of the truck bellhousings is too big for the car transmissions. At least one of the parts vendors sells a step ring for this swap, but if you can't find one it would be easy for any machine shop to make it.

Ray

 
mr wabbit 
Super Senior Member
Posts: 3535
mr wabbit
Loc: IL
Reg: 02-26-02
Re: Bellhousing Question
11-27-04 06:57 PM - Post#556989    
    In response to raycow

that is the difference is that in 68 gm started changing the truck bellhousing over to the smaller pilot hole ones, this smaller hole was for the SM318 trannies

they were done away with by or some time in 69

you can put a car 4 speed on a large hole truck bellhousing but you hjave to be careful that the trans is centered, racedvl on 67-72chevytrucks forum has a muncie 4 speed in his 69 with the original bellhousing, he justr centered it and bolted it on, has been running it for a few years no problems

good lcuk


good luck
Randy
Lincoln Il
1982 Trans Am WS7
305 TH350 7.5" for now
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JimKshortstep4x4 
Chevytalk Moderator & "10th Year" Silver Supporting Member
Posts: 4604
JimKshortstep4x4
Loc: Muskegon, MI, USA
Reg: 03-28-02
Re: Bellhousing Question
11-27-04 11:51 PM - Post#556990    
    In response to raycow

Raycow,

I am interested in the stepring that you mentioned in your post. My bell housing in my 65 Impala has the larger register hole and I cannot come up with a way to center my Muncie to it without an adapter.

I can make one easy enough but I need an idea on how the stepring is held in place. Is it flanged? (It sounds like it could be).

Any information that you have would be appreciated.

Jim
Member 65-66 Full Size Chevrolet Club

65 Impala SS, 400sbc, Muncie M-22
66 Impala SS, 396, TH 400
69 El Camino, 350, TH 350
71 Short bed stepside 4x4, 350/TH 350
71 Snow plow, 4x4, 350, TH 350
72 GMC Shortbed, stepside, 427/TH 400


 
john57 
Member
Posts: 9

Reg: 11-20-04
Re: Bellhousing Question
11-28-04 02:43 PM - Post#556991    
    In response to JimKshortstep4x4

I too would be interested in how this step ring is held in place. Would also like to know who sells them. How could you be sure trans is centered without step ring? Thanks John

 
raycow 
Honored Member
Posts: 18713

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
Re: Bellhousing Question
11-28-04 11:22 PM - Post#556992    
    In response to JimKshortstep4x4

Quote:

My bell housing in my 65 Impala has the larger register hole and I cannot come up with a way to center my Muncie to it without an adapter. I can make one easy enough but I need an idea on how the stepring is held in place.




Jim, I have never examined any of the commercial step rings, so I always wondered how they were secured too.

The one I made myself was just a simple ring made from plate about the same thickness as the flange part of the front bearing retainer. I bored the I.D. first to a shrink fit on the retainer and then assembled the two parts and turned the O.D. to about a .003" slip fit in the bellhousing. That way it would stay in place on the transmission during installation and removal and there was no danger of it getting loose inside the bellhousing.

If you are needing one of these for a car, I am wondering what you have for a bellhousing. The normal car bellhousing is about 4-11/16" and the larger truck bell is about 5-1/8". There was a rather scarce Muncie 4 speed made for maybe one year only that was smaller than the normal car size. Could you possibly have one of those?

Ray

 
raycow 
Honored Member
Posts: 18713

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
Re: Bellhousing Question
11-28-04 11:46 PM - Post#556993    
    In response to john57

Quote:

Would also like to know who sells them. How could you be sure trans is centered without step ring?




John, I think it was one of the outfits selling replacement bellhousings, like Lakewood.

Without using a ring of some kind you can't ever be sure the transmission is centered in the bellhousing. The mounting bolts alone can't do it because they have too much clearance in their holes. You would run the risk of premature failure of the front bearing and likely the more expensive parts as well. By the time you noticed symptoms like excessive noise or the transmission jumping out of gear, the damage would already have been done.

Ray

 
JimKshortstep4x4 
Chevytalk Moderator & "10th Year" Silver Supporting Member
Posts: 4604
JimKshortstep4x4
Loc: Muskegon, MI, USA
Reg: 03-28-02
Re: Bellhousing Question
11-29-04 08:24 AM - Post#556994    
    In response to raycow

raycow,

Thanks for the reply. I will plan on making a ring like you did. Sounds like a plan.

I have two aluminum bell housings and both have a very large hole in them. I did not measure them but the holes must be 5- 5 1/2" in diameter. They both will clear a 12" clutch and they look like the early 60's style of bell housings.

The M-22 that I have has the same diameter register as the M-21 and M-20 which must be 4 11/16".

Jim
Member 65-66 Full Size Chevrolet Club

65 Impala SS, 400sbc, Muncie M-22
66 Impala SS, 396, TH 400
69 El Camino, 350, TH 350
71 Short bed stepside 4x4, 350/TH 350
71 Snow plow, 4x4, 350, TH 350
72 GMC Shortbed, stepside, 427/TH 400


 
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