 Welding new bellhousing |
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| 86motoman |
 Apr 12 2005, 08:37 PM
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#1
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Member  Group: Members Posts: 200 Joined: 13-May 04 From: Walla Walla, WA Member No.: 2,064  |
Is it possible to weld a new or different bellhousing on a transmission?
And if so how? |
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Replies(1 - 19)
| rick 918-S |
Apr 12 2005, 08:42 PM
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#2
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Hey nice rack! -Celette Group: Members Posts: 20,493 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region 
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It would make a great video... pretty colors and lots fire and thick smoke. But don't try it inside and don't add water. I think the case is magnisium. Just make an adapter plate.
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| 86motoman |
Apr 12 2005, 08:57 PM
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#3
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Member Group: Members Posts: 200 Joined: 13-May 04 From: Walla Walla, WA Member No.: 2,064 |
I keep finding these broken g50's....so in these cases an adapter is not even possible.
So I take it magnesium is not possible to weld? |
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| riverman |
Apr 12 2005, 09:12 PM
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#4
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Learn As I Go Group: Members Posts: 449 Joined: 18-January 05 From: Kitchener, ON Member No.: 3,466 |
It is possible to weld magnesium. Powdered magnesium or magnesium shavings burn quite nicely, but solid magnesium is relatively inflammable.
Welding magnesium is difficult because it has a low melting point and distorts easily (sort of like aluminum, but more so), but with the proper filler material, the right equipment, and loads of experience it can be done. Check around, maybe you can find someone willing to give it a go. |
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| 86motoman |
Apr 12 2005, 09:37 PM
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#5
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Member Group: Members Posts: 200 Joined: 13-May 04 From: Walla Walla, WA Member No.: 2,064 |
right on....so it sounds like it is possible? How critical is the alignment issue. Is it fairly straight forward to get it aligned or a big pain in the a**?
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| lapuwali |
Apr 12 2005, 10:34 PM
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#6
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
Point one: inflammable = flammable. English doesn't make much sense there. The word you want is non-flammable. Point two: I believe the G50 uses an aluminum case. Point three: welding any casting out of any material is not for the faint hearted or those of less than stellar skills. On the "broken" G50s, are you saying the bellhousing is broken? If so, I wonder if a new bellhousing could be made up to adapt it do a 901/915 mount. Bellhousings can be bolted on , and don't have to be made out of a casting. Lots of work, but a G50 might be worth the effort for some conversions. |
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| Cap'n Krusty |
Apr 13 2005, 08:48 AM
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#7
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
G50s use the same bolt pattern as all the older trannies, so making an adapter or changing the bell housing is unnecessary. The Cap'n
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| Mueller |
Apr 13 2005, 09:12 AM
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#8
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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how broken are the cases??? as long as you have 50% or so of the original mating surface, it seems like it wouldn't be too hard to mount the adapter plate and repair the case..... as with most everything..."anything" is possible, but not normally by the average person...... "if you have ask" : (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) yes, it can be done, but it's going to be expensive since it sounds like you'd have to send it off to a shop...figure $85 an hour average shop time, minimum 5 hours, possible 10+ hours not including tooling or fixture costs.....now if you have a buddy with the equipment and that is talented, you could be in luck...... how much "cheaper" are these broken transmissions you are finding?? unless they are 50% or more off the normal price, I'd have to say it's not worth attempting |
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| 86motoman |
Apr 13 2005, 01:32 PM
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#9
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Member Group: Members Posts: 200 Joined: 13-May 04 From: Walla Walla, WA Member No.: 2,064 |
This particular tranny the bellhousing is gone...like busted off. I am concerned where to weld a new bellhousing to the old transmission.
Also, I would like to know the pros and cons of doing this. For example, would I be able to use a chevy flywheel and starter? Would I then not be able to find a clutch to fit the chevy flywheel and porsche transaxle spline? So many questions so little time. I called a machine shop in town. He batted around the idea of making something to bolt a chevy bellhousing to the transaxle. Just an idea. |
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| 86motoman |
Apr 13 2005, 01:37 PM
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#10
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Member Group: Members Posts: 200 Joined: 13-May 04 From: Walla Walla, WA Member No.: 2,064 |
As far as the price goes...they are between $700 and $1100 after I get it shipped. I figure by the time I get it fixed I would have somewhere between $1500 and $2000. With some looking you can find used g50's for $1500 - $2500;therefore, I think the deciding factors would be the advantages and disadvantages of having a chevy bellhousing on the tranny. Do you have any thoughts?
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| Brad Roberts |
Apr 13 2005, 01:48 PM
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#11
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Good question.
I personally beleive you could do a bolt on bellhousing much like they do with the aftermarket 2 speed powerglides for Mopar/Ford applications. The issue with the G-50: Running it mid-engine is a pain in the arse. It has to be run upside down. Now you have compounded your issues. Check into a company called TCI. I'm trying to find the place that cast the different bolt on bellhousings. Starts with a A.. B |
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| Brad Roberts |
Apr 13 2005, 01:55 PM
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#12
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
This is EXACTLY what I'm talking about:
This one is from ATI. Simple bolt on solution. If drag racers can launch 2500lb 1000hp door slammers with this... you can build a street car with it. B |
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| 86motoman |
Apr 13 2005, 02:00 PM
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#13
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Member Group: Members Posts: 200 Joined: 13-May 04 From: Walla Walla, WA Member No.: 2,064 |
Yah...that pic is perfect. Now I just need to match the area on the tranny to get it to align |
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| 86motoman |
Apr 13 2005, 02:03 PM
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#14
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Member Group: Members Posts: 200 Joined: 13-May 04 From: Walla Walla, WA Member No.: 2,064 |
Here is a pic of the tranny.
Attached image(s) 
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| BIGKAT_83 |
Apr 13 2005, 02:13 PM
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#15
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Senior Member Group: Members Posts: 1,798 Joined: 25-January 03 From: Way down south Bogart,GA Member No.: 194 Region Association: South East States
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Here is a shorter one.....
Attached image(s) 
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| Brad Roberts |
Apr 13 2005, 02:38 PM
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#16
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Basically the pic I showed will need a flat surface to mate to. Have the case machine flat.
I *think* that the lower pic from Bigkat is a "BOP" adapter for the stock Chevy glide bellhousing. "BOP" Buick/Olds/Pontiac. The pic I showed bolts to the pump face on the glide. B |
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| Brad Roberts |
Apr 13 2005, 02:45 PM
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#17
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
I have thought about this setup in the past:
Use a stock Chevy flywheel and clutch setup with a custom clutch disc splined for the G50 input shaft. A conversion company long gone called "Jaidecar" did this with 915's in the past. They had a small internal/external splined adapter that mated the stock Chevy disc to the 915 splines. Maybe they couldnt get the disc close enough to the input shaft. I dont recall. I have only seen two over my 17 year history with the 914's. It can be done. Time/Money/Patience. Oh.. FYI: I modified your pic. Another reason why I dislike 100megapixel camera's.. ha ha B |
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| BIGKAT_83 |
Apr 13 2005, 02:58 PM
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#18
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Senior Member Group: Members Posts: 1,798 Joined: 25-January 03 From: Way down south Bogart,GA Member No.: 194 Region Association: South East States
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The adapter I posted was for a SBC to a flathead ford V8 transmission adapter(still available) I looked into these trying to make a plate like the old Jaide setup.
Attached thumbnail(s) 
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| TimT |
Apr 13 2005, 02:58 PM
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#19
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retired Group: Members Posts: 4,033 Joined: 18-February 03 From: Wantagh, NY Member No.: 313 |
The G-50 case is aluminum
I went to buy a G-50 once, the seller said the bell housing had some damage.. it looked quite like the one pictured. I couldnt believe the a-hole couldnt be up front and tell me it was basically trash. OUCH, it takes some hit to break a tranny like that. |
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| 86motoman |
Apr 13 2005, 04:28 PM
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#20
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Member Group: Members Posts: 200 Joined: 13-May 04 From: Walla Walla, WA Member No.: 2,064 |
We have decided it can or has been done. Now the question is can I get it done reasonably. |
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