Notices
Pre-Power Stroke Diesel (7.3L IDI & 6.9L) Diesel Topics Only

85 6.9 I broke the bellhousing... Now what?

 
  #1  
Old 07-12-2019, 06:08 PM
trustyone
trustyone is offline
New User
Thread Starter
Join Date: Jul 2019
Location: Branson, Missouri
Posts: 3
trustyone is starting off with a positive reputation.
Unhappy 85 6.9 I broke the bellhousing... Now what?

My 1985 4x4 f250 6.9 auto started making some noise and now I have a cracked bellhousing!... Will any idi auto trans work for parts? How about 2wd trannies? I don't know what kind of job I am looking at.... Does it sound like I will need a bellhousing, flex plate, torque converter, front bushing/seal, rear engine seal?.... How big of a job is this?

Thanks!.... Jeff
 
  #2  
Old 07-12-2019, 06:15 PM
lonewolf_'s Avatar
lonewolf_
lonewolf_ is online now
Senior User
Join Date: May 2019
Posts: 387
lonewolf_ is gaining momentum as a positive member of FTE.
Dang those Nevada Sex Stones.............

any IDI tranny will bolt up. so I'm told

what did you have ? a C6 ?
 
  #3  
Old 07-12-2019, 06:38 PM
85e150
85e150 is offline
Moderator
Join Date: Apr 2004
Posts: 22,093
85e150 has a superb reputation85e150 has a superb reputation85e150 has a superb reputation85e150 has a superb reputation85e150 has a superb reputation85e150 has a superb reputation85e150 has a superb reputation85e150 has a superb reputation85e150 has a superb reputation85e150 has a superb reputation85e150 has a superb reputation
That would be a C6 automatic, which is a one piece case. It's the tail shaft and housing that make a C6 into a 4x4 trans, and to change that requires a full tear down. So you could use a 4x2 trans, and swap the tail shaft and housing over to it. If you are not a transmission man, you are looking at having a shop do it, and freshen up the trans while you are at it.

You mention needing a bellhousing--nope, that's part of the case. Flex plate? Did you destroy your current one? Torque converter? If your trans is questionable, get a new or reman'd unit. Seals? Install new on a job like this. Rear main seal? Only if it's leaking.

On a 4x4 it's a fairly big job, and if you include the rebuild of the transmission, you are looking at an 8 to 9 on a scale of 10 for difficulty/skill all things considered. (scale of 10 for car and light truck, jmo, not a recognized scale under DIN/SAE standards.
 
  #4  
Old 07-12-2019, 07:28 PM
lonewolf_'s Avatar
lonewolf_
lonewolf_ is online now
Senior User
Join Date: May 2019
Posts: 387
lonewolf_ is gaining momentum as a positive member of FTE.
C6 is an easy build .... the thing is you need to keep it Cleaner than an engine rebuild and if you don't have Experience then you better have a shop manual.

good snap ring tools and a Clutch Compression fixture with Feeler gauges is all you really need. I've seen the dealers do them with even less LMAO
 
  #5  
Old 07-12-2019, 07:53 PM
trustyone
trustyone is offline
New User
Thread Starter
Join Date: Jul 2019
Location: Branson, Missouri
Posts: 3
trustyone is starting off with a positive reputation.
Thanks for the quick help!... So, I was told that the bell housing was cracked.... Sounds like I need to find a transmission for parts....
 
  #6  
Old 07-12-2019, 08:50 PM
lonewolf_'s Avatar
lonewolf_
lonewolf_ is online now
Senior User
Join Date: May 2019
Posts: 387
lonewolf_ is gaining momentum as a positive member of FTE.
yes IF the Bell Housing is Cracked then you need a new Transmission case...... depending on where the crack is, a good welder might be able to fix things.
 
  #7  
Old 07-12-2019, 08:52 PM
trustyone
trustyone is offline
New User
Thread Starter
Join Date: Jul 2019
Location: Branson, Missouri
Posts: 3
trustyone is starting off with a positive reputation.
I will start looking!
 
  #8  
Old 07-12-2019, 09:01 PM
lonewolf_'s Avatar
lonewolf_
lonewolf_ is online now
Senior User
Join Date: May 2019
Posts: 387
lonewolf_ is gaining momentum as a positive member of FTE.
it's possible to TIG weld a case back together and it might require the assistance of a machine shop to correct irregularities ..... it's possible
 
  #9  
Old 07-12-2019, 11:16 PM
DarkOverCast
DarkOverCast is offline
Elder User
Join Date: May 2015
Posts: 865
DarkOverCast is gaining momentum as a positive member of FTE.
Originally Posted by lonewolf_ View Post
it's possible to TIG weld a case back together and it might require the assistance of a machine shop to correct irregularities ..... it's possible
It definitely is possible. However the heat is hard on the cast aluminum and more cracks will spawn. But it's definitely doable. My forward bell housing on my four speed is two pieces that were tig'd back together as I couldn't find a replacement at the time.
 
  #10  
Old 07-13-2019, 11:11 AM
lonewolf_'s Avatar
lonewolf_
lonewolf_ is online now
Senior User
Join Date: May 2019
Posts: 387
lonewolf_ is gaining momentum as a positive member of FTE.
Originally Posted by DarkOverCast View Post
It definitely is possible. However the heat is hard on the cast aluminum and more cracks will spawn. But it's definitely doable. My forward bell housing on my four speed is two pieces that were tig'd back together as I couldn't find a replacement at the time.

yes the heat is hard on the case, we do have a process of Stress relief that can be used to alleviate future cracking but this is not a common practice in most shops.

getting another case is probably the lesser of the evils... I do 100% agree here
 
  #11  
Old 07-15-2019, 10:41 AM
RaymondIV
RaymondIV is offline
Senior User
Join Date: May 2018
Posts: 294
RaymondIV is starting off with a positive reputation.
Since you have to pull the trans anyway, take it by a few welding/machine shops that specialize in aluminum welding and get a qualified opinion. We all did a lot of welding everywhere I worked, but never aluminum. Many cattle and hay semi trailers had aluminum frames and crossmembers, when cracked we'd have an aluminum welder come in, he'd do a good job and never any later failures.
 
  #12  
Old 07-15-2019, 04:49 PM
big ole ford
big ole ford is offline
Senior User
Join Date: Mar 2008
Location: douglasville
Posts: 367
big ole ford is starting off with a positive reputation.
Id try and get it welded if you can, i had one done a while back that was cracked in 2 places and it cost me $ 180.00 which was basically 2 hours flat rate labor. If you need a core and are anywhere near Lithia Springs Georgia i have a 2 wheel drive core i will make youa deal on, it worked when i pulled it but you have to take it completely apart to switch to the 4x4 output shaft. Good luck with it!
 

Thread Tools
Search this Thread

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.