 Something odd in Matt's tranny, Look what I found in first |
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| Dr Evil |
 Jun 13 2006, 09:01 PM
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#1
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Send me your transmission!  Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region 
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So before I helped gut Matt's car he let me take it for a drive. It is a tail shifter so it was sloppy, but the gears all went in without a grind. I was actually surprised at how well it shifted. So, you can immagine my suprise when I parted his tranny to find a 2-5 set of dog teeth with all of the bands and blocks on the first gear. Also, they were pretty worn as was the synchro band. It was odd that it would have worked so well in this shape. I changed it out with a great used 2-5 set of teeth and a synchro band.
Lets see if it starts to shift like crap now (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/wink.gif) If anyone wants to be a guinea pig for me to experiment on wiht regards to this I am game. (IMG:style_emoticons/default/biggrin.gif) Attached image(s) 
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Replies(1 - 8)
| Gint |
Jun 13 2006, 09:18 PM
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#2
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Mike Ginter Group: Admin Posts: 16,082 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains  |
Andy take that pic for ya?
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| hmeeder |
Jun 13 2006, 09:25 PM
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#3
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Dante's Sportscar Group: Members Posts: 352 Joined: 21-November 04 From: San Diego, CA Member No.: 3,154 |
I had never seen that done.
Now I know you can machine an extra groove into a 2-5 dogteeth set and use it that way (Clayton showed me one he had worked on.) If I understand it correctly, the only reason for the extra brakeband on 2-5 is that you shift "up" to those gears and you need to get the gear to spin to correct speed. Since first gear is never shifted "up" to, it doesn't need the extra brake band, and does have the extra notch for the first gear stop block. Without ever having tried it, I could see how it may work just fine. Am I thinking of it wrong? |
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| bondo |
Jun 13 2006, 09:27 PM
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#4
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
Haha, I found a trans like that. I thought "hey, that's a neat trick". Made sense, since tons of v8 conversions are out there starting in second gear from a stop, without the special dog teeth.
So then I decide to try it myself on jkeyzer's trans, and it has trouble going into first from a stop. (IMG:style_emoticons/default/dry.gif) I have another trans I had done the same way that's going into my flared car. I hope it works well enough to use. YMMV. |
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| Dr Evil |
Jun 13 2006, 09:40 PM
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#5
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region
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QUOTE(hmeeder @ Jun 13 2006, 11:25 PM)  I had never seen that done. Now I know you can machine an extra groove into a 2-5 dogteeth set and use it that way (Clayton showed me one he had worked on.) If I understand it correctly, the only reason for the extra brakeband on 2-5 is that you shift "up" to those gears and you need to get the gear to spin to correct speed. Since first gear is never shifted "up" to, it doesn't need the extra brake band, and does have the extra notch for the first gear stop block. Without ever having tried it, I could see how it may work just fine. Am I thinking of it wrong? Nope, you are correct in your assumptions, but it is a little bit more than that. 1st also has a more robust block which would potentially force the synchro band out more than the other gears to cope with the torque forces of the first gear pairing. Second would be slightly less so would not need as much. It still amazes me how this worked so well in such a state of repair. |
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| Andyrew |
Jun 13 2006, 10:19 PM
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#6
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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Whats odd, is my 901 does not grind or anything... but its sloppy as hell... AND I have a rennshifter and new bushings..
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| Dr Evil |
Jun 13 2006, 10:50 PM
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#7
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region
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That is odd. It should shift very crisp wiith those things done.
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| Andyrew |
Jun 13 2006, 11:27 PM
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#8
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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Lets say it "clunks" into gear... like its overcoming a gate.
Drove a stock 1.7... I envy'd the shifter... it was smooth as butter!! (but I couldnt literally find the gear I wanted... lol) Andrew |
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| Dr Evil |
Jun 13 2006, 11:53 PM
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#9
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region
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Internals kaput?
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