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Topic Review (Newest First)
08-19-2013 04:06 PM
Blastek
Quote:
Originally Posted by justinjbaron View Post
I have 1400 miles on my '13 Rubicon. Twice in the last few days I've gone to back out of parking spot (in a heated, level garage...though vehicle was cold), and I've crunched when engaging reverse. It is kinda like the same crunch I've experienced in 10 year old manual tranny cars when the transmissions get worn out and a little squirrely.

I'll admit I may have attempted to move the lever faster/harder in these instances than typical, but was still surprised by it. There is a brief but fairly powerful jolt when the crunch happens, too.

Have others experienced this? Is this good reason to see dealer?
If you depress the clutch and wait a second or two for the input shaft to spin down, there should be no possibility of the dog teeth clashing. Reverse is synchronized, so you shouldn't get a crunch, but it's still possible if you do it really quick. This is the same on all manual transmissions.
08-19-2013 03:31 PM
justinjbaron
Quote:
Originally Posted by SilverSport View Post
The shifter is "gated" to make it harder to accidentally shift into reverse. While in neutral and clutch depressed push the shift lever to the right and then back into reverse with some force.
I have 1400 miles on my '13 Rubicon. Twice in the last few days I've gone to back out of parking spot (in a heated, level garage...though vehicle was cold), and I've crunched when engaging reverse. It is kinda like the same crunch I've experienced in 10 year old manual tranny cars when the transmissions get worn out and a little squirrely.

I'll admit I may have attempted to move the lever faster/harder in these instances than typical, but was still surprised by it. There is a brief but fairly powerful jolt when the crunch happens, too.

Have others experienced this? Is this good reason to see dealer?
02-27-2013 03:03 AM
Rooster76 My 2nd gear is also "crunchy." Usually it is less of an issue when you shift 2500-3000 rpm. Just today at about 7000 miles I had it pop (not slip) out of 2nd. (2012 JKR)

I'm not a mechanic but I take it that the whole crunchy thing is because of the synchros. I have another issue that may be related. I have had a handful of times where the shifter will be locked in the gate, but not all the way in gear. It happens in 2nd and 4th. When trying to accelerate of course the RPMs jump up and there is a light grinding noise. Taking it back into N and setting it again in gear made it like it never happened. I tried to tell myself that I just put it weak after it happened the first time, but now I think there is more too it than that.

There have also been a couple times where I have not been able to get into 2nd when coming to a place where I'm going to do a slow rolling turn. Basically going less than 15mph, clutch to the floor, I start putting it into 2nd and it will go past the gate but then grind and not set in gear. Both of those times I just came to a stop and put it in.

It's pretty annoying because it only happens maybe once every 2000 miles so there is no way they are going to be able to reproduce it at the service department. I'm hoping a TSB will come out that will address the issue. As far as I know the only one for the transmission is about a faulty boot http://www.wranglerforum.com/f33/tsb...tml?highlight=
02-26-2013 09:04 PM
SilverSport
Quote:
Originally Posted by Casotakar1229 View Post
hmmm....never thought about this being in issue in my jeep until I read through this thread...thanks a lot. I'm not a hypochondriac...
I'm not a hypochondriac either. But I do a have a pretty good sense of what feel/sounds normal and what doesn't.

Quote:
Originally Posted by miket52989 View Post
........I feel like printing out this thread and taking it to the dealer.
Members have printed threads and taken them to the dealer. Just hope the service writer bothers to read it.
02-26-2013 08:59 PM
miket52989 I got my 2013 jeep in August, and one week later it was in the shop because of this issue. The dealership didn't even take it for a drive and told me that it was normal. My dad 2011 wrangler and my brother 2012 Rubicon told me that it would get better. I am glad now to find this article and prove I am not crazy! . The dealership told me that I will be fine because it is under warranty if I have any issues. I am still having the issue and it has made me want to get rid my jeep. I do not feel safe when pulling into traffic because it does not want to go into second gear. I feel like printing out this thread and taking it to the dealer.
02-26-2013 07:44 PM
Casotakar1229 hmmm....never thought about this being in issue in my jeep until I read through this thread...thanks a lot. I'm not a hypochondriac...
02-26-2013 06:13 PM
SilverSport I feel blessed that at least one mechanic at my dealership knows transmissions and cares about the customer.

I was wondering what was the latest with your trans.
02-26-2013 06:09 PM
Blastek
Quote:
Originally Posted by SilverSport View Post
I am a very happy Jeeper!

The shift tower was replaced and when I went to pick up my Jeep, the shop foreman showed me the problem. On the bottom of the shift tower is the shift fork. When the shift lever is moved the fork moves between shift rails to change gears. The shift fork was too wide and was hitting on the rails. This caused hard shifts from 1st to 2nd and the "crunchy" feeling. The shift fork on the new shift tower was skinnier.

He told me he replaced a shift tower on another JK for the same issue. he also talked to the Chrysler zone rep for the Denver area and the zone rep said he was already aware of the issue from other dealers. One dealer didn't have a shift tower on hand so the tech machined a couple of thousands of each side of the fork to solve the issue.

Shifts are now smooth yet with positive engagement and no crunchy feeling.

The shop foreman let me snap a cell phone pic of the bottom of the old tower showing the fork and the marks where it was hitting the shift rails. My apologies for the fuzziness.

That is awesome. You have great luck with transmission repairs

I'm bringing mine in for the rattles and I'll mention this as well. Although, I'm thinking they'll go for a new trans this time.
02-26-2013 06:04 PM
SilverSport I am a very happy Jeeper!

The shift tower was replaced and when I went to pick up my Jeep, the shop foreman showed me the problem. On the bottom of the shift tower is the shift fork. When the shift lever is moved the fork moves between shift rails to change gears. The shift fork was too wide and was hitting on the rails. This caused hard shifts from 1st to 2nd and the "crunchy" feeling. The shift fork on the new shift tower was skinnier.

He told me he replaced a shift tower on another JK for the same issue. he also talked to the Chrysler zone rep for the Denver area and the zone rep said he was already aware of the issue from other dealers. One dealer didn't have a shift tower on hand so the tech machined a couple of thousands of each side of the fork to solve the issue.

Shifts are now smooth yet with positive engagement and no crunchy feeling.

The shop foreman let me snap a cell phone pic of the bottom of the old tower showing the fork and the marks where it was hitting the shift rails. My apologies for the fuzziness.

02-26-2013 01:00 PM
SilverSport Finally had time to drop my Jeep off at the dealer. They had ordered a new shift tower.
Will update later.
01-31-2013 09:07 PM
Con Artist Mine doesn't grind, but it does feel "scratchy" while shifting from time to time...mostly when it's cold. Pausing in Neutral before completing the shift usually alleviates the issue for me. Plain and simple, this manual just doesn't like to be rushed. If I just take my time, I don't have any issues. Don't expect to row through gears like it's a six-speed in a Corvette.
01-31-2013 05:58 PM
Houkie Wonder if it is really the clutch, since you mentioned it happens when cold.
If parked outside and closer to freezing or below, the rubber shifter boot get stiff. Besides popping out of gears ( example you put it away in 1st, second will pop) it is just hard to shift. There are many treads about this. This is what we have done: if parked outside we put it in 2nd gear and turn the heater vents to shifter boot when starting. See if this easy stuff works for you (dealer wanted us to buy the boot and they would install it, but wanted to avoid more trouble with them. They had the jeep previously in 10 F for 5 days and only looked under it, nothing wrong.Later I told them I found this boot issue on this forum and needless to say: THANK you all.
01-22-2013 12:34 AM
winterhawk
Quote:
Originally Posted by Blastek View Post
try shifting between 2500-3000 from 1-2. Or pause at the 2nd gear gate for half a second before sending it home. The 1-2 synchro is not adequate IMHO. Sometimes i get full grinds.
I had the same issues with my 2004 Rubicon. The 2012 the same. Use a slight delay if you want it to slip in gear without the click. I've tried synthetic Royal Purple. Same thing. At least on the 2012 Rubicon the throw out bearing doesn't growl like the 2004 Rubicon's do.
01-21-2013 11:35 PM
Blastek i stick it in 2nd with the transfer case in neutral
01-21-2013 11:31 PM
Deceptionz99 When I start my jeep and let it warm up for a minute when it's realllly cold like 8 degrees. I will just roll through the gears with the clutch in. When I start driving It usually shifts better then if I didn't so it. I do still double clutch second sometimes because that one likes to crunch
01-21-2013 10:43 PM
SilverSport The shifter is "gated" to make it harder to accidentally shift into reverse. While in neutral and clutch depressed push the shift lever to the right and then back into reverse with some force.
01-21-2013 10:39 PM
OilfieldTrash
Quote:
Originally Posted by Blastek View Post
reverse is synchronized on this trans so you dont have to pause before selecting it. you can also enter it while moving without a grind. odd feature considering the lack of design on the rest of the trans.
Interesting... What's this gear gate you speak of? Im sorry if the newb-ness is too much to handle.
01-21-2013 10:31 PM
Blastek
Quote:
Originally Posted by OilfieldTrash View Post
I will say it took me a while to get used to the way my JK shifts. A lot longer than my '89 F-250. Im not sure what makes it so different because the Ford was also very low-geared.

I dont mean to change the subject, but what about reverse? I find it a little hard sometimes and the first time I used reverse, it was like I only shifted it halfway in and it made a horrible grind when I let off the clutch. So I quickly pushed the clutch back in and pulled the shifter kinda hard and it finally slipped in there. Anybody else had this problem? ('11 JK)
reverse is synchronized on this trans so you dont have to pause before selecting it. you can also enter it while moving without a grind. odd feature considering the lack of design on the rest of the trans.
01-21-2013 10:27 PM
OilfieldTrash I will say it took me a while to get used to the way my JK shifts. A lot longer than my '89 F-250. Im not sure what makes it so different because the Ford was also very low-geared.

I dont mean to change the subject, but what about reverse? I find it a little hard sometimes and the first time I used reverse, it was like I only shifted it halfway in and it made a horrible grind when I let off the clutch. So I quickly pushed the clutch back in and pulled the shifter kinda hard and it finally slipped in there. Anybody else had this problem? ('11 JK)
01-21-2013 08:20 PM
SilverSport
Quote:
Originally Posted by clayps View Post
......i'm just happy its now on record that i had it looked at for that reason.
x2
01-21-2013 05:24 PM
Strokerswild I've noticed this when it's colder out as well.

This morning it was -12 here in MN. Can you say crunchy? Even when pulling out of 1st. And it popped out of 4th on nearly every shift too until I had about 10 miles on the trip. Grrrrr.

Did I buy a 1960s vehicle cleverly disguised as a new one? The 5-speed tranny in my '98 SE was light years ahead of this POS.

01-21-2013 04:55 PM
clayps Took mine up to have them look at it today. They took it out for a lengthy drive then put it up on the hoist to take a look at a few things. Tech said it felt fairly normal and the added crunch noise when cold is normal as well. I'm just happy its now on record that I had it looked at for that reason.
01-19-2013 09:55 PM
SilverSport Shop foreman drove my Jeep, a brand new Jeep, and a 2011 and said they all shifted different. Said he didn't experience the crunch but he was concerned enough about how it shifted that he ordered a shift tower. Will wait and see. He is pretty knowledgeable about transmissions and doesn't believe the issue is in the geartrain, but I am not convinced, yet. When I get the gear crunch on cold mornings, I can feel the sensation in the shift lever. Almost like two objects spinning at different speeds when they try to mesh.
01-19-2013 12:13 PM
BrianN
Quote:
Originally Posted by SilverSport View Post
What seems odd to me is the six speed in my '11 never acted up in cold weather.

On a side note, called the shop foreman at the dealer and told him what was going on.
Also said my '11 didn't so this. So dropped it off on the way home so he can drive it tomorrow morning. Supposed to drop into the low 20s or teens tonight. He also lined up a new Jeep to drive and compare. He confirmed the synchros can be slow to mesh when the weather is cold, but the "crunchiness" I mentioned got his curiosity.
Did you get your jeep back? What did they about the transmission?
01-17-2013 03:26 PM
clayps Update: I called my local dealership. They want to take it for a drive. Will be taking it in Monday morning.
01-17-2013 09:18 AM
clayps
Quote:
Originally Posted by SilverSport
What seems odd to me is the six speed in my '11 never acted up in cold weather.

On a side note, called the shop foreman at the dealer and told him what was going on.
Also said my '11 didn't so this. So dropped it off on the way home so he can drive it tomorrow morning. Supposed to drop into the low 20s or teens tonight. He also lined up a new Jeep to drive and compare. He confirmed the synchros can be slow to mesh when the weather is cold, but the "crunchiness" I mentioned got his curiosity.
Let me know what they say or do.
01-16-2013 08:45 PM
Splittrain
Quote:
Originally Posted by onetraveller

Think of the shift as a two part motion. The first part is moving it out of the current gear. You need to let off the gas just before doing this to take the load off the gear splines. The second part is applying a little pressure towards the gear you want to move it into. As the RPMs drop, the gear splines will line up and you'll feel it slide into gear.

Mike
THIS.

I picked up my first wrangler the other day. Learned the basics of stick shift from a friend and have been driving around a parking lot after work every day since because I'm waiting on the title to transfer from the previous owner's bank. I drove a motorcycle all through college and thought the shift was the same concept. On cycles, you just hold the clutch and jam the lever into the next gear (downshifting requires something different). So when I started shifting from 1st to 2nd on the JK, I noticed it was notchy and not smooth. I searched around and what you are supposed to do is shift out of first and put a tiny bit of pressure into second while your foot is off the gas and it should slide right in!

Happy shiftin'
01-16-2013 08:27 PM
Jackster3
Quote:
Originally Posted by SilverSport View Post
What seems odd to me is the six speed in my '11 never acted up in cold weather.

On a side note, called the shop foreman at the dealer and told him what was going on.
Also said my '11 didn't so this. So dropped it off on the way home so he can drive it tomorrow morning. Supposed to drop into the low 20s or teens tonight. He also lined up a new Jeep to drive and compare. He confirmed the synchros can be slow to mesh when the weather is cold, but the "crunchiness" I mentioned got his curiosity.
keep us informed. very curious to the problem. ill be taking mine in as well.
01-16-2013 08:21 PM
mathew85
Quote:
Originally Posted by SilverSport View Post
What seems odd to me is the six speed in my '11 never acted up in cold weather.

On a side note, called the shop foreman at the dealer and told him what was going on.
Also said my '11 didn't so this. So dropped it off on the way home so he can drive it tomorrow morning. Supposed to drop into the low 20s or teens tonight. He also lined up a new Jeep to drive and compare. He confirmed the synchros can be slow to mesh when the weather is cold, but the "crunchiness" I mentioned got his curiosity.
01-16-2013 08:10 PM
SilverSport What seems odd to me is the six speed in my '11 never acted up in cold weather.

On a side note, called the shop foreman at the dealer and told him what was going on.
Also said my '11 didn't so this. So dropped it off on the way home so he can drive it tomorrow morning. Supposed to drop into the low 20s or teens tonight. He also lined up a new Jeep to drive and compare. He confirmed the synchros can be slow to mesh when the weather is cold, but the "crunchiness" I mentioned got his curiosity.
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