 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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| sixaddict |
Jan 2 2016, 08:07 AM
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Senior Member Group: Members Posts: 969 Joined: 22-January 09 From: Panama City Beach, FL Member No.: 9,961 Region Association: South East States 
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Since there seems to be some knowledgeable subscribers here I would like to tag on a question
I have 3 liter DE car with 3rd/5th flip done by shop. I am running out of rpms at top end on tracks with long straights......Anybody out there with knowledge to recommend a fix. Thanks TOT |
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| r_towle |
Jan 2 2016, 08:15 PM
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#3
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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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QUOTE(sixaddict @ Jan 2 2016, 09:07 AM)  Since there seems to be some knowledgeable subscribers here I would like to tag on a question I have 3 liter DE car with 3rd/5th flip done by shop. I am running out of rpms at top end on tracks with long straights......Anybody out there with knowledge to recommend a fix. Thanks TOT Get another fifth gear and put it back in as fifth gear. Rich |
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| wndsrfr |
Jan 2 2016, 08:51 PM
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#4
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Senior Member Group: Members Posts: 1,457 Joined: 30-April 09 From: Rescue, Virginia Member No.: 10,318 Region Association: MidAtlantic Region
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QUOTE(r_towle @ Jan 2 2016, 06:15 PM) Get another fifth gear and put it back in as fifth gear. Rich (IMG:style_emoticons/default/agree.gif) Frankly, with a 3 liter, you can go back to stock just fine IMO. I've got both on two cars...2.7/6 has stock trans, the 2.3/4 has flipped 5&3rd with S as 4th. On the 2.7/6 I geared it down using 225/45/15's for most tracks but was on the rev limiter (7000) at Daytona so put on the "street" wheels 225/59/16's which added 10mph & still touched the rev limiter---Daytona is surreal! |
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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 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 J P Stein
Since there seems to be some knowledgeable subscr... Jan 2 2016, 08:54 AM 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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