 Trans gear flip. Can I do it? |
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| Han Solo |
 Dec 27 2015, 01:45 PM
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#1
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Member  Group: Members Posts: 291 Joined: 30-September 13 From: Middle Tennessee Member No.: 16,456 Region Association: South East States  |
I'll probably get more eyes on the thread in the Garage.
I've got a spare 901 trans purchased about 2 years ago. No idea how many miles are on it or what year car it came off of. What I do know is I need a different gear set for my Prepared '73 914 autocross car. I've read through the gear set charts and I believe the flipped 3rd and 5th will get me where I need to go. So today I got that trans on the bench, drained the fluid and removed the rear cover. Those of you who know what they're looking at, please let me know how 1st gear slider and dog teeth look in the photos. My initial observations are that those look pretty good. I noted that someone had installed a magnetic drain plug. That had done it's job and there was about 1/2" of metallic goo stuck around the inside of the plug. The gear oil came out pretty clean with only very slight traces of micro particles. I just read Bondo's thread on trans disassembly and it's pretty intense. There's also no mention of the 3rd and 5th gear flip so I've got no clue exactly what that procedure is. 914 transmission disassembly (IMG:http://www.914world.com/bbs2/uploads_offsite/i1336.photobucket.com-16456-1451245548.1.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i1336.photobucket.com-16456-1451245548.2.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i1336.photobucket.com-16456-1451245548.3.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i1336.photobucket.com-16456-1451245548.4.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i1336.photobucket.com-16456-1451245549.5.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i1336.photobucket.com-16456-1451245549.6.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i1336.photobucket.com-16456-1451245549.7.jpg) |
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| oldie914 |
Jan 2 2016, 05:16 AM
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Member Group: Members Posts: 114 Joined: 2-May 10 From: Germany Member No.: 11,680 Region Association: None |
You should not put the gear stack from the 2nd transmission into the case in your car without adjusting the pinion depth. Depth is measured and adjusted with the gaskets between the case and the intermediate. Measure the thickness of the old gaskets with a micrometer and use the same thickness gaskets when you put the gear cluster back into the case.
Also, in one of the pictures it looks like the mainshaft ball bearing has been turning underneath the retaining plate. The bearing then cuts into the plate and you have no clamping force. Plate should hold the bearing with about 0.08mm interference. Pictures show a damaged retaining plate and one that has been reworked.    |
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Posts in this topic
Han Solo Trans gear flip. Can I do it? Dec 27 2015, 01:45 PM
jimkelly I think slider (the side shown, anyway) is usable
... Dec 27 2015, 02:09 PM r_towle Too hard to see for a decent opinion.
For the fli... Dec 27 2015, 03:42 PM
Han Solo
So, take the fifth gears off.
Take the 4th and 3... Dec 27 2015, 08:57 PM r_towle
So, take the fifth gears off.
Take the 4th and ... Dec 27 2015, 11:09 PM 396 Dog teeth and syncro band looks like it past its l... Dec 27 2015, 06:21 PM Han Solo
Dog teeth and syncro band looks like it past its ... Dec 27 2015, 09:04 PM Bleyseng I did the flipping years ago for AX and it was bar... Dec 28 2015, 07:25 AM Han Solo Okay. I went in deep today and here's what I f... Jan 1 2016, 07:55 PM Han Solo
You should not put the gear stack from the 2nd tr... Jan 2 2016, 06:40 AM oldie914 The gear cluster on the intermediate plate, ring/p... Jan 2 2016, 07:47 AM Han Solo
The gear cluster on the intermediate plate, ring/... Jan 3 2016, 06:31 PM J P Stein That trans is in pain.
The keys to a good shifting... Jan 2 2016, 07:52 AM sixaddict Since there seems to be some knowledgeable subscri... Jan 2 2016, 08:07 AM J P Stein
Since there seems to be some knowledgeable subscr... Jan 2 2016, 08:54 AM r_towle
Since there seems to be some knowledgeable subscr... Jan 2 2016, 08:15 PM wndsrfr
Get another fifth gear and put it back in as fif... Jan 2 2016, 08:51 PM jmill
I am running out of rpms at top end on tracks wit... Jan 2 2016, 10:51 AM Dave_Darling That's the easiest way to go.
You can make ta... Jan 2 2016, 07:43 PM Van914 With a 3.0 stock gears are the way to go. Jan 3 2016, 07:32 AM sixaddict Thanks for the gear input ....Couple of good thoug... Jan 3 2016, 09:25 AM |
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