| Slant Six Forum https://www.slantsix.org/forum/ |
|
| A904 Disassembly Help Needed https://www.slantsix.org/forum/viewtopic.php?t=64356 |
Page 2 of 2 |
| Author: | GregCon [ Sun Jan 05, 2020 4:58 pm ] |
| Post subject: | Re: A904 Disassembly Help Needed |
I doubt there are any meaningful differences. I wonder why it failed like that? It looks to be 'lack of lube' related. And I gotta say....it looks like it was 'driven even though the driver could tell there was something wrong'. Or? |
|
| Author: | slantvaliant [ Mon Jan 06, 2020 8:31 am ] |
| Post subject: | Re: A904 Disassembly Help Needed |
It gave me no warning. I was 40 miles into a 600 mile weekend trip which I wouldn't have started if I thought there was anything wrong. The fluid looked good that morning. After tooling along at 70 MPH, give or take, with all vitals, sounds, smells, and "feels" good to go, I entered a town and slowed to 40 for good ways. Right before the "shhhBANGjerk" started, I was thinking about how smooth the pavement on that street was. |
|
| Author: | slantvaliant [ Mon Jan 06, 2020 8:40 am ] |
| Post subject: | Re: A904 Disassembly Help Needed |
The second transmission is pretty much cooperating in its own disassembly. I did have to use a thread chaser on one of the front pump threaded holes to get the slide hammer in. All the guts are out from the front, except for the output shaft. The sprag looks OK so far. The nut holding the B&T flange didn't give in to my first couple of tries late last night, so it's soaking in PB Blaster. I'll get the spanner and the 24" breaker on it this evening. Maybe some heat, if needed. |
|
| Author: | SpaceFrank [ Mon Jan 06, 2020 11:04 am ] |
| Post subject: | Re: A904 Disassembly Help Needed |
Quote: What is different on the "medium or large car" 904s vs "small car" versions? Is it just the extension housing and output shaft?
I asked that question (among others) in this thread a while back. Charlie wasn't sure, but he seemed to think you could swap the shorter tailshaft and extension housing from an A-body 904 onto a B/C-body unit (not sure if he meant across the 64/65 split or not).I can say that my teammate did end up building our current transmission with the main case from a '65 B/C-body 904 and most of the internal guts, tail shaft, and extension housing from a '64 A-body 904. He said the only parts he used from the '65 transmission were the "Low/Reverse assembly," but I don't know if that was just due to convenience. (We were in a huge hurry at the time, and he stayed up all night finishing the assembly.) He commented that everything went together fine aside from the end play being a little looser than spec. Not sure if that was just a result of re-using the same shims and washers in a different case or what. That transmission is currently giving us some issues that may or may not be related. |
|
| Author: | GregCon [ Mon Jan 06, 2020 2:49 pm ] |
| Post subject: | Re: A904 Disassembly Help Needed |
On the 904 I recently assembled, I tossed the stock overrunning clutch and used an ATI 'hi-performance' clutch (sprag). It uses 30 rollers instead of the stock number (I think 12?). I don't think there is anything wrong with the stock sprag....they have done well in millions of miles. But, I do think they can be improved upon and it's hard to 'not' do. But it's an expensive mod and requires some machining so it's not a must. * the ATI site calls this a 10 roller sprag when in fact it is 30. I called them on this and after a lot of checking they called back and confirmed it is 30. I told them they oughta correct their site and they assured me they would. That was 3 months ago... http://www.atiracing.com/products/trans ... sembly.htm |
|
| Author: | slantvaliant [ Mon Jan 06, 2020 3:24 pm ] |
| Post subject: | Re: A904 Disassembly Help Needed |
Quote: On the 904 I recently assembled, I tossed the stock overrunning clutch and used an ATI 'hi-performance' clutch (sprag). It uses 30 rollers instead of the stock number (I think 12?).
They may be using the 10- or 12-roller designation to ID the sprag being replaced, not the new HP version. Mine have 10 rollers.
... * the ATI site calls this a 10 roller sprag when in fact it is 30. I called them on this and after a lot of checking they called back and confirmed it is 30. I told them they oughta correct their site and they assured me they would. That was 3 months ago... http://www.atiracing.com/products/trans ... sembly.htm |
|
| Author: | bossanova5 [ Mon Jan 06, 2020 8:26 pm ] |
| Post subject: | Re: A904 Disassembly Help Needed |
Back when I rebuilt my 904, Pat Blais from T'Flite Patty's transmissions was an incredible resource for both parts and information. |
|
| Author: | slantvaliant [ Wed Jan 08, 2020 5:28 am ] |
| Post subject: | Re: A904 Disassembly Help Needed |
Got it apart!  Seriously, the second transmission is almost apart. The flange nut succumbed to heat and leverage. Propane and a long breaker bar, in this case. The rear pump body looks good, as does the overrunning clutch. The same access hole plug is resisting, so it's soaking in penetrant. It'll get some heat and leverage of its own later. |
|
| Page 2 of 2 | All times are UTC-07:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|