 Rebuilt tranny too tight? |
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| kenpolives |
 Aug 6 2007, 06:13 PM
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#1
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Member  Group: Members Posts: 167 Joined: 31-December 03 From: Albany NY Member No.: 1,479  |
I finally got my Car/ rebuilt tranny back from the mechanic today, new 1st gear, slider, and syncro. However getting into first is very hard and reguires a good amount of force, is this normal? and will it get better as the gears are worked more.
No grinds on anything like that I am happy to say. 74 side shifter Thanks |
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Replies(1 - 5)
| SGB |
Aug 6 2007, 06:49 PM
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just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
When I got my gear stack back from Dr Evil it was a little stiff for a few weeks. Never crunched or clanked, just a lot of resistance on the lever.
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| Dr Evil |
Aug 6 2007, 06:58 PM
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#3
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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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Yup, normal. Your synchro band is beefier and your 1st gear stuff actually has teeth! They will mesh soon, you must drive it! If it grinds, that is a different story. Congratulations!
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| ChrisFoley |
Aug 6 2007, 10:31 PM
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#4
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I am Tangerine Racing Group: Members Posts: 7,934 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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Is it the same wrt getting out of first gear? I've driven the LE restoration car a bit and getting into or out of first is a bit troublesome so far.
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| Dr Evil |
Aug 6 2007, 10:51 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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Good to hear the LE is driving (IMG:style_emoticons/default/biggrin.gif) In and out can be tight. The synchro also needs to move into its happy place where its blocks and bands are all optimized. There is no real way to screw up 1st as far as the shifting mechanism goes. Its straight forward. Ya just got to work it in. You can shift it like ya mean it and it will not grind. It is not an internal shift rod binding (only possible internal cause and verrrrrrrrrrrry unlikely).
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| PRS914-6 |
Aug 7 2007, 12:59 AM
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#6
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Excellence Magazine Project 914 3.6 Group: Retired Members Posts: 1,278 Joined: 20-May 06 From: Central California Member No.: 6,031 Region Association: None  |
Here is something I posted on the bird board for a 915 but it would work the same for a 901. Basically the new syncros texture is like sand paper and until you get it rubbed off, it will be stiff. Try this, it works...
I thought I would share this since it worked so well. The "concept" but not the method came from John Walker and Carquip. I fully rebuilt a 915. New sliders, syncros, dog teeth, bearings etc. As usual, it shifted very stiff. I filled it with cheap 90 wt. With the car on jack stands and the drive shafts disconnected I ran the engine at about 2500 rpm and started shifting gears back and forth with NO CLUTCH. I probably shifted 200 times fast\back and forth. Then I hooked up the drive shafts and mounted the tires and repeated the procedure with no clutch again but still on the stands. This added extra weight and inertia for the syncros to have to slow down. I then dumped the cheap oil and refilled with a quality oil and took it for a ride. This thing shifts like butter! Can't believe it's a 915......Needless to say, I'm a happy camper. |
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