Transmission in R gear selector stuck in 1 | FerrariChat

Transmission in R gear selector stuck in 1

Discussion in 'Technical Q&A' started by 86mondi, Sep 14, 2022.

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  1. 86mondi

    86mondi Rookie

    Aug 6, 2022
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    Frank Buckman
    #1 86mondi, Sep 14, 2022
    I just got a Montiel 3.2 about three weeks ago. The car arrived with a non-functioning clutch. I replaced the slave cylinder, master cylinder and the hose between the hardline and the slave cylinder. I bled the system thoroughly with a power bleeder. The clutch pedal feel is good ( firm and what I would expect in a car with a working clutch).

    I had a couple of good short test drive runs with the car and it seem to be shifting pretty well. At the end of one of the runs I put the car into reverse and The gear selector got stuck in the reverse position. In order to get up the driveway and get home I had to force it out of reverse and put it in first.

    After this, I was looking at where the gear selector enters the tunnel. I remove the gate and found that I was able to shift into first and reverse easily with the gated shifter off (The shifting worked well if the gear selector was all the way over to the driver side when shifting into first and reverse). I attempted to go for another test drive.

    I shifted into reverse and it seemed to be going fine then the car seemed like it wanted to come out of reverse (gear selector moving toward first on it’s own), once I was in position to shift into first I was able to shift into first but the car stayed in reverse gear even though the gear selector was in the first gear position. Now the gear selector is in the first gear position and the transmission is in reverse. I am unable to get the gear shift selector out of the first gear position.

    I officially know that I am in over my head but wanted to see if this is characteristic of a particular problem. Thanks!!!
     
  2. wmuno

    wmuno Formula Junior
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    Bill Muno
    #2 wmuno, Sep 14, 2022
    Sounds like your problem is internal to the transmission - the selector forks and/or the dog clutches.
     
  3. yelcab

    yelcab F1 World Champ
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    #3 yelcab, Sep 15, 2022
    There are two possibilities: an easy one to fix, and a very expensive one to fix.

    Easy one, your shifter insider the gearbox is misaligned after being man-handled by you. The fix is to dump the fluid, remove the gear oil pan, realign the shift rod/forks/selector and match it up to the shifter in the cabin.

    Expensive one, your gearbox is really messed up with gears locking in positions. That is probably beyond the scope of a DIY.
     
  4. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #4 Rifledriver, Sep 15, 2022
    Simple fix. Shifter is out of adjustment.

    Unless you understand how it works internally it will be difficult to correct but easy for one who knows them. Will require removing the oil pan but not a big deal for anyone well versed on them.

    Can be exacerbated by a loose shift gate.
     
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  5. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #5 Rifledriver, Sep 15, 2022
    The dog clutches. How can this be caused by those?
     
  6. wmuno

    wmuno Formula Junior
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    #6 wmuno, Sep 15, 2022
    The dogs have to slide freely on the main shaft. If anything caused the shart to get scored (metal debris), a clutch might get locked into an engauged position. The car owner stated he was forcing the forks/clutches. I agree that he could have caused the R-1 fork to become misalligned.
     
  7. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #7 Rifledriver, Sep 15, 2022
    Would not allow trans to be in reverse and lever in 1st. You have never worked on one of these have you?

    Someone left too much space between selector forks, while fighting to get out of reverse the selector finger slipped between the widely spaced selector forks allowing lever to go back in 1st slot leaving reverse engaged or they are not too widely spaced and the shaft is out of adjustment allowing the finger out of the selector fork the other way. .Pretty common problem when you have people who dont know them setup the internal linkage.


    If you hear hoof beats, don't look for a zebra, its probably a horse.
     
  8. wmuno

    wmuno Formula Junior
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    #8 wmuno, Sep 15, 2022
    I never took my transaxle appart, but I do know how it works internally. I have adjusted the the length and angle of the gear shift lever. The OP said he said he serviced the slave cylinder, but did not make any adjustments to the shift lever. A slave cylinder service should not have caused this problem. The question is why did this happen now?
     
  9. 86mondi

    86mondi Rookie

    Aug 6, 2022
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    Frank Buckman
    #9 86mondi, Sep 16, 2022
    Thanks very much for the responses.

    I removed the oil pan on the gear box.

    I found that the selector fork was not aligned with the finger that it engages. We manipulated the shift linkage so that the fork was engaged with the lower finger but the finger wound not move. The lower finger is rotated backward and will not move forward.

    Also two bits of unexpected metal were found in the oil pan. A right angle piece that appears to have cracked and a little pin piece.

    i am guessing that the other half of the right angle piece is jammed in the gears?

    It is noteworthy that reverse gear works.

    The car moves normally in reverse currently.

    Officially going to punt at this point.

    Does engine have to come out to get gear box out?

    Should I get local place help get gearbox out and then ship gearbox to a specialist for a rebuild.

    Anyone know of a place to send the gearbox?




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  10. yelcab

    yelcab F1 World Champ
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    #10 yelcab, Sep 17, 2022
    Sorry to see that.

    The engine and its subframe is dropped from the car. Then the engine is removed from its subframe, then the gear box is separated from the engine and is sent to a Ferrari tech to get disassembled and put back together.

    As to whom to send it, Rifledriver (the poster above) in Austin is a good one to send it to. In fact, he can look at that pin and tell you where it is located in the gearbox.
     
  11. yelcab

    yelcab F1 World Champ
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    #11 yelcab, Sep 17, 2022
    There are three of those pins for each slider gear. I remember seeing a previous post on a similar failure with those pins. It has to come apart to fix.

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  12. 86mondi

    86mondi Rookie

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    #12 86mondi, Sep 17, 2022
    Thank you yelcab!

    Any estimate on how much this will cost. I hesitate to ask.
     
  13. yelcab

    yelcab F1 World Champ
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    #13 yelcab, Sep 18, 2022
    It's hard to estimate since you don't know what else has failed with this gearbox. It's also dependent on how many things you need/want to do while you are in there. Gears and bearings for the 308 gearboxes are getting expensive and hard to find. The labor to get the gearbox out and back in is 40 hours. The labor for the gearbox disassembly and reassembly is 20 hours. Then add to that all the expensive parts that you may or may not be able to find. My wild guess is you cannot get out from under this mess for less than $15K and six months.
     

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