 What are all the things I can do to make 901 shift better |
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| Brett W |
 Nov 21 2006, 12:01 AM
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#21
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Advanced Member  Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None 
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Better yet, I think you should let Jake build it.
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| groot |
Nov 21 2006, 07:19 AM
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#22
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Dis member Group: Members Posts: 894 Joined: 17-December 03 From: Michigan Member No.: 1,444 |
Very clever!!!
One question. The Apex joint is applied just before the shifter console, no? It seems like that's where it belongs. |
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| Randal |
Nov 21 2006, 09:45 AM
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#23
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(Brad Roberts @ Nov 20 2006, 09:52 PM)  Leave that to me! I'm better suited and more well known for being an asshole!! Watch this: Grant, I think you should build a big type 4 for your car..LOL B If you and Erik get this organized and make the pieces Brad, please figure out what it would take to make another. Urgently needed as you know and understand. (IMG:style_emoticons/default/dry.gif) |
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| Brad Roberts |
Nov 21 2006, 12:16 PM
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#24
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Correct Kevin!! install the apex joint just in front of the shift console.
Randal, this may be something I can get done quickly. I have just about everything needed to complete one. Let me see what I can do. B |
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| JWest |
Nov 21 2006, 01:46 PM
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#25
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Senior Member Group: Members Posts: 1,662 Joined: 6-January 03 From: Fort Worth, TX Member No.: 97 Region Association: None
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I will have a linkage kit that does all the things you guys are talking about - it is in production and will be available in about 60 days.
This is not vaporware - I designed it about a year ago but it took a while to make it a marketable product. To me, that means fully sealed with rubber boots and adaptable to different configurations while being as affordable as I could make it. I have a machined support with bronze bushings that supports the shift rod on both sides of the shift head inside the console. Included is a rear shift rod section and u-joint and boots to keep the whole thing sealed. At the firewall, I have an appliance that mounts a spherical bearing and a new shift rod section with a u-joint. A rubber boot protects the bearing. Replacement of the ball cup is not needed - new plastic is fine. I created and used a new lever at the transmission with a spherical bearing mounted in a bronze sleeve to replace the cup bushing. The difference was too small to be perceived. I also evaluated it in a 911 at the base of the shifter with similar results - it was not worth the effort. |
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| Brad Roberts |
Nov 21 2006, 02:04 PM
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#26
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Show us (IMG:style_emoticons/default/biggrin.gif)
Erik said something about me and Rennshift.. Erik, I have pushed/sold more Rennshifts than WEVO shifters. WEVO doesnt have a 901 solution because of James' products. I was working with them on providing a solution when James hit the market with his setup. The market segment was too small for them after running the sales numbers. I have a car right now we can test on. We have 2 more events before the end of the year. B |
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| JWest |
Nov 21 2006, 02:11 PM
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#27
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Senior Member Group: Members Posts: 1,662 Joined: 6-January 03 From: Fort Worth, TX Member No.: 97 Region Association: None
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QUOTE(Brad Roberts @ Nov 21 2006, 02:04 PM) Oh, I will - the testing is done and the money has been spent - so I have to now! No spy shots, though - there will be a grand unveiling when they are ready to ship. |
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| maf914 |
Nov 21 2006, 02:49 PM
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#28
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Not a Guru! Group: Members Posts: 3,049 Joined: 30-April 03 From: Central Florida Member No.: 632 Region Association: None
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James,
Will your new linkage kit be compatible with the RennShift? I assume it would be. I am curious since I just purchased a RennShift. (IMG:style_emoticons/default/idea.gif) This has been an interesting thread. |
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| JWest |
Nov 21 2006, 03:10 PM
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#29
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Senior Member Group: Members Posts: 1,662 Joined: 6-January 03 From: Fort Worth, TX Member No.: 97 Region Association: None
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QUOTE(maf914 @ Nov 21 2006, 02:49 PM) James, Will your new linkage kit be compatible with the RennShift? I assume it would be. I am curious since I just purchased a RennShift. (IMG:style_emoticons/default/idea.gif) This has been an interesting thread. Yes, it can be used with the stock or RennShift side-shift shifter. |
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| GBallantine |
Nov 21 2006, 03:51 PM
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#30
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Member Group: Members Posts: 74 Joined: 12-October 04 From: Toronto,Ont.Canada Member No.: 2,930 |
QUOTE(James Adams @ Nov 21 2006, 01:10 PM) QUOTE(maf914 @ Nov 21 2006, 02:49 PM) James, Will your new linkage kit be compatible with the RennShift? I assume it would be. I am curious since I just purchased a RennShift. (IMG:style_emoticons/default/idea.gif) This has been an interesting thread. Yes, it can be used with the stock or RennShift side-shift shifter. James, Do you have an approx. price for the linkage kit? GB |
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| JWest |
Nov 21 2006, 07:17 PM
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#31
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Senior Member Group: Members Posts: 1,662 Joined: 6-January 03 From: Fort Worth, TX Member No.: 97 Region Association: None
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QUOTE(GBallantine @ Nov 21 2006, 03:51 PM) James, Do you have an approx. price for the linkage kit? GB I will separate the firewall and shift console parts into two separate kits at around $200 each. There may be a slight discount when you buy both at a ballpark of $400. There is finish work required, but it is low precision - non-critical fitment. I will supply loose splined ends for the u-joints to make to your own tube to connect the two kits together. Because the u-joints allow 360 degree clocking, it will be easy to fabricate - basically just get any clearance bends in (such as needed for a 4 cyl) and make the length right and have the new ends welded to a tube. You can correct for rotation later with the u-joint connections and alignment is not critical because there are u-joints on both ends. The firewall kit will also require re-use of the solid splined portion of the factory shift rod up by the shifter - just grinding off the welds and tacking it to the new tube I supply. This part does not wear out so I see no need to reproduce it. I may offer the kit fully finished later, but to start I want to keep the price down and keep it simple. |
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| J P Stein |
Nov 22 2006, 06:54 PM
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#32
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
Just my .02, but....
When the internals of your tranny are trashed, none of this stuff will help you. If your tranny is trashed to the point where a gear or 2 are missing from the party, it has probably been fucked up for some time and you have no idea how a properly functioning 901 should work. If the trans has been trashed under your ownership, it might also be a good idea to replace the wear parts in the linkage....since you're there. IF you have a fresh, properly built up trans....I'm talking a guru built unit, no filed sliders/dogteeth, bearings that "look OK"...new stuff..only then can you judge for yourself whether or not these goodies are worth their cost or just taking up the space of your old parts. No sense putting the cart ahead of the horse, eh? This post has been designed to offend as many people as possible (IMG:style_emoticons/default/biggrin.gif) |
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| Brad Roberts |
Nov 22 2006, 07:56 PM
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#33
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Ha ha...
People FREAK out when I tell them 5k to rebuild a tranny. They typically have a WTF? look on their face..LOL I tell them: you spent 10k rebuilding your engine.. 5k on paint.. and 5k on the tranny "bothers" you?? WTF?? LOL B |
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| bam914 |
Nov 22 2006, 08:13 PM
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#34
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Member Group: Members Posts: 334 Joined: 23-November 03 From: Atlanta, Ga Member No.: 1,378 Region Association: None |
What can be done to the inside of the transmission? I have heard that removing everyother tooth on the syncro hub and the selector ring would help it to engage quicker. I thought about trying this in my ITC car.
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| JWest |
Nov 22 2006, 08:38 PM
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#35
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Senior Member Group: Members Posts: 1,662 Joined: 6-January 03 From: Fort Worth, TX Member No.: 97 Region Association: None
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QUOTE(J P Stein @ Nov 22 2006, 06:54 PM) Just my .02, but.... When the internals of your tranny are trashed, none of this stuff will help you. Correct. Linkage and shifters help to find the right gear at the right time without concentrating as hard (and if you think you have some extra concentration to give up you are a better driver than most pros). The actual gear engagement is dependant upon good trans internals - no way around that! |
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| J P Stein |
Nov 22 2006, 08:45 PM
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#36
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
QUOTE(bam914 @ Nov 22 2006, 06:13 PM) What can be done to the inside of the transmission? I have heard that removing everyother tooth on the syncro hub and the selector ring would help it to engage quicker. I thought about trying this in my ITC car. Whaoo, crash box (IMG:style_emoticons/default/biggrin.gif) Back in the day, we'd take a t-10 4 speed and remove 2 of 3 dog teeth off the gear and likewise off the slider, IIRC....hay, it was 40 years ago. The brass syncro rings could be bought with no dog teeth. ......the Borg Warner syncro set up is a bit different that the Porsche syncro....better, I might add. Porsche went to it with the G50. Anyhew, it would shift like lightening....going up. I tried to downshift it one time....but never again. (IMG:style_emoticons/default/biggrin.gif) An rpm matched double clutch prolly woulda worked....but drag racers don't bother with that stuff. |
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| grantsfo |
Nov 23 2006, 09:38 AM
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#37
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Arrrrhhhh! Group: Members Posts: 4,327 Joined: 16-March 03 Member No.: 433 Region Association: None |
QUOTE(J P Stein @ Nov 22 2006, 04:54 PM) Just my .02, but.... When the internals of your tranny are trashed, none of this stuff will help you. If your tranny is trashed to the point where a gear or 2 are missing from the party, it has probably been fucked up for some time and you have no idea how a properly functioning 901 should work. If the trans has been trashed under your ownership, it might also be a good idea to replace the wear parts in the linkage....since you're there. IF you have a fresh, properly built up trans....I'm talking a guru built unit, no filed sliders/dogteeth, bearings that "look OK"...new stuff..only then can you judge for yourself whether or not these goodies are worth their cost or just taking up the space of your old parts. No sense putting the cart ahead of the horse, eh? This post has been designed to offend as many people as possible (IMG:style_emoticons/default/biggrin.gif) Agreed. However I'm focused on linkages with this post and making assumption that 901 internals are working properly. I have plenty of expereince with good 901's to say shift linkages could use some help in making shifting more intuitive. I know you come from an era of driving turn of the century tractors and think a "modern" 1960's design synchromesh tranmission and associated linkages are state of the art. Some of us youngsters just dont have an appreciation for the art of finding the right gear like you do JP. Didnt you learn to shift on one of these back in the day? (IMG:style_emoticons/default/laugh.gif) (IMG:http://www.retiredtractors.com/Popper/Images/D-early.jpg) |
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| J P Stein |
Nov 23 2006, 10:45 AM
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#38
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
Nah, for those I drove you had to stoke the boiler with wood. Shifting was via the Johnson bar...... (IMG:style_emoticons/default/laugh.gif)
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| DrifterJay |
Nov 24 2006, 01:59 PM
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#39
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I break stuff... Group: Members Posts: 1,034 Joined: 25-May 03 From: Oceanside, California Member No.: 737 Region Association: None |
QUOTE(Brad Roberts @ Nov 22 2006, 05:56 PM) Ha ha... People FREAK out when I tell them 5k to rebuild a tranny. They typically have a WTF? look on their face..LOL I tell them: you spent 10k rebuilding your engine.. 5k on paint.. and 5k on the tranny "bothers" you?? WTF?? LOL B Thank you Thomas (IMG:style_emoticons/default/beer.gif) |
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| Brad Roberts |
Nov 26 2006, 01:05 AM
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#40
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Jared,
I know of 5 tranny builders in the USA who actually "rebuild" 901/914 tranny's. The rest of them replace worn parts with more used parts. Very few people know what a 901 feels like with all new parts. B |
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