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Old 12-05-2008, 11:26 PM   #1
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Fu##ed manual transmission

I was attampting to drain the manual transmission from my jeep wrangler 2001. I thinjk it is AX-15. I removed a long bolt of abotu 12 cm with a shaft by mistake. NOw I Cant get this bolt back in as the gear has moved inside. DOes anybody know what the name of this bolt is I cannot find it in my haynes manual. and how do I get it back in?? any help greatly appreciated. As I dpont even know if I can drive at the mo

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Old 12-05-2008, 11:31 PM   #2
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2001 tj 5 speed is a NV3550.

Give me some time to dig the info up in the FSM.

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Old 12-06-2008, 12:42 AM   #3
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I'm looking through the FSM for your jeep and having a hard time finding what your talking about. Can you take a picture of it's location on the transmission or describe it's location.

Also don't drive it.
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Old 12-06-2008, 07:44 PM   #4
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HI thanks for the quick reply I am new to this forum, but I am getting into the general maintenance of the jeep. BUT I think have made a serious error at this early stage of the game. I have jeep 2001, the transmission is an NVG 3550. I attach a few pictures with the bolt that was removed and with its position in the hole.
The bolt is located a few inches to the rear of the fill plug.

I can feel there is a rotating shaft in side the transmission block, I can lift it up but it would be impossible to hold up whilst inserting the bolt.

I thought that I might be able to go through the fill plug to rotate the shaft to the correct postition adn insert the bolt.

I am unsure if the car wil be OK, can I even drive it to a mechanic, or am I going to totally tuin the transmission.

Any help on how I can fix greatly appreciated.

I just tried to upload pictured I will try adn add to a sperate message.
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Old 12-06-2008, 07:46 PM   #5
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i'd say without seeing anything yet, don't drive it at all. loose parts will shift, and basically be a wrench in the other gears and ruin it all.

waitin for some pics
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Old 12-06-2008, 07:52 PM   #6
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X2 on waiting on the pictures. I have the FSM open and ready.
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Old 12-06-2008, 07:58 PM   #7
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pictures of my fu##ed NVG 3550 transmission

some pics of the bolt I took out, it lies about 2 inches to the rear of the fill plug.
half way up the NVG 3550 transmission on the driver side.
I have looked at all the specs but cannot find what this is, and how I put it back

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Old 12-06-2008, 08:00 PM   #8
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give me a minute.
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Old 12-06-2008, 08:22 PM   #9
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REVERSE IDLER SUPPORT BOLT

Is what the FSM claims is the name of it.

I'll see if it's something you can do yourself or if you need it towed to a shop.
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Old 12-06-2008, 08:23 PM   #10
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can you take a picture of the end of the bolt itself?
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Old 12-06-2008, 08:28 PM   #11
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ok pics coming through
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Old 12-06-2008, 08:28 PM   #12
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How mechanically savvy are you? And do you have and tranmission gear tools?
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Old 12-06-2008, 08:30 PM   #13
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fu##ed transmission

SOrry the pics are a bit low quality but I Think you can see OK.
on the bolt head is written 10.9
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Old 12-06-2008, 08:32 PM   #14
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to answer the first question, I am not very mechanically savy adn have no transmission tools. This is sounding bad.
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Old 12-06-2008, 08:41 PM   #15
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Not too bad. But if you've never pulled the two halves of a transmision apart I wouldn't suggest you do it.

The bolt holds the reverse idler in place and to put the bolt back in you'll have to pull the front and rear sections of the transmissions apart to pick the reverse idler up into place to install the bolt. Pulling it apart and putting the bolt back in is easy but the put the to halves back together you'll need some specialty tools.


Give me some more time to read up on the break down and reassembly of it before you make a decision to have it towed. I may find a easy way to reinstall it for you without pulling it apart.

I read slow, my bad. Just give me some time.

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Old 12-06-2008, 08:47 PM   #16
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Thanks mate,

I was wondering if I could open the fill plug which is about 2 inches in front and use a feller gauge or something to lift up the reverese idler, and reinsert the bolt.

Ye I dont fancy pulling aprt the transmission. I onyl haver jack stands, and no way of gettign the car up.

any help much obliged
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Old 12-06-2008, 08:53 PM   #17
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This is why I told you to give me a minute.......I looked at the bolt right ABOVE/beside the casting lift point on the pass side. ( the little metal piece of the housing that sticks out)

The bolt you need to know about is right BELOW the casting lift point on the drivers side.

Give me a couple more minutes.

I'm trying bud I haven't torn the NV3550 apart. But I have rebuilt a couple NV3500's <-- chevy version of the tranny.
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Old 12-06-2008, 09:40 PM   #18
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Everyone looking at this thread.... do some research to help him out.

That's what the forum is for. Help and helping others.
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Old 12-06-2008, 09:53 PM   #19
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Cheers for the info and support distortedtj. I guess its getting pretty late in teh states now. I am based in australia. PLenty of good of roads trials down here.

IF Anyone can help much appreciated. but I'm thinking I might need to call the mechanics in.

Lesson learnt: If it aint bust don't try and fix it.
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Old 12-06-2008, 09:58 PM   #20
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If you do have it towed...

Remove both driveshafts to prevent any movement of gears in the transmission.
Just put them in the back of the jeep. You can use the E-brake/wheel chocks to keep the vehicle from moving.

Do this before the vehicle is moved.

I'm looking through the FSM and see the bolt in several of the diagrams but it does not list what it is, nor' does it show it being removed.

If I get the info for you I'll let you know.
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Old 12-06-2008, 10:25 PM   #21
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sounds like the trans has to be removed and torn down. i agree about towing, remove the d shafts and you'll be good.

thats gonna be an expensive mistake.
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Old 12-06-2008, 11:02 PM   #22
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Well... I cant save pictures from my FSM to my computer for copyright laws but I'm pretty sure I was right the first time. It seems to be the bolt that holds the reverse idler in place. And to install it you'll have to pull the case apart.

Not what you wanted to hear but, lesson learned I guess.

If I find I'm wrong I'll let you know.

Also if you don't need the jeep back on the road ASAP. I'd go to a jeep dealer and talk to a mechanic. Not the maintance rep but the guy that actually turns the wrenches. He will have the FSM and computer diagram's for your jeep and if he's a nice guy, he mite be able you help you out better.
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Old 12-06-2008, 11:04 PM   #23
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And.... the bolt is for .....

Reverse Idler and Support.
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Old 12-06-2008, 11:12 PM   #24
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If I were in your situation I would be thinking about having a new clutch installed when they pull the transmission. I would also use it as an opportunity to have my leaking rear main seal replaced. I would also ask around and see if there is anything else I should consider maintaining or upgrading while the transmission was out. If the transmission has to be pulled, might as well get as much done as you can and try to turn it into a bit of a positive.

Sure glad I read this thread so I don't make the same mistake. Good luck.
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Old 12-07-2008, 06:30 AM   #25
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Hey distortedtj,

I have a program that will remove that function so can print or save any portion of the FSM.

PM me if you want it.
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Old 02-28-2012, 08:34 AM   #26
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what ever happened with this? i did the same thing yesterday and i'm hoping i dont have to drop my transmission as i've never done that before.
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Old 02-29-2012, 09:22 AM   #27
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well if anyone is interested. i fixed mine with a bent coat hanger. i shoved it through the drain plug and used it to push the reverse shaft support back into position while my friend looked through the bolt hole and guided me. i'm super lucky.
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Old 02-29-2012, 09:27 AM   #28
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Good Job! I glad you posted your success. Now future people will know its possible to do without removal.

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