 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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| r_towle |
Dec 27 2015, 03:42 PM
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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Too hard to see for a decent opinion.
For the flipping of the gears, pull the gear stack. When you lay them next to each other you will see they can only fit a certain way. When you take the fifth gears off, and exchange them to the different shafts, it still fits together... You have two shafts. The long one is the drive shaft, connected to the engine. The short one is the driven shaft, it gets its power from the drive shaft. So, take the fifth gears off. Take the 4th and 3rd gears off too. Keep the orientation correct, front and back. Now, take the fifth driven gear and put it on the drive shaft in position 3 Take the 5th drive gear and put it on the driven shaft in position three. Do that swap for both 5th and third, put fourth back the way you found it. Fifth is the farthest away from the clutch. Make sense? |
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| Han Solo |
Dec 27 2015, 08:57 PM
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#3
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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 |
QUOTE(r_towle @ Dec 27 2015, 03:42 PM)  So, take the fifth gears off. Take the 4th and 3rd gears off too. Keep the orientation correct, front and back. Now, take the fifth driven gear and put it on the drive shaft in position 3 Take the 5th drive gear and put it on the driven shaft in position three. Do that swap for both 5th and third, put fourth back the way you found it. Fifth is the farthest away from the clutch. Make sense? That's exactly what I needed to know! So you're actually swopping gears instead of flipping them. Makes perfect sense. |
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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
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 oldie914 You should not put the gear stack from the 2nd tra... Jan 2 2016, 05:16 AM 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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