6spd Manual Rattle / Grind

[Trailhawk603]

Hi all,

I’ve had my 6spd Sahara JL for almost 1000 miles and I truly am I in love with it. Could other manual owners take a listen and let me know if it’s back to service I need to go.

I am getting a clutch or tranny related rattle or grind on the 1 to 2 or more commonly 2 to 3 shift right around 3,000 to 4000 rpm letting the clutch up. If I slowly let the the clutch up it seems to help or shift higher or lower than the rpm range that produces the noise.

Caught it on video so other manual owners please help and take a listen.

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[DanW]

Hi all,

I’ve had my 6spd Sahara JL for almost 1000 miles and I truly am I in love with it. Could other manual owners take a listen and let me know if it’s back to service I need to go.

I am getting a clutch or tranny related rattle or grind on the 1 to 2 or more commonly 2 to 3 shift right around 3,000 to 4000 rpm letting the clutch up. If I slowly let the the clutch up it seems to help or shift higher or lower than the rpm range that produces the noise.

Caught it on video so other manual owners please help and take a listen.

Mine has a small rattle (may not be a rattle, but that's the best description) when under very hard acceleration and a fast shift, right when the clutch engages. Right now I'm chalking it up to normal. If I don't dump the clutch so hard on the upshift, it doesn't do it.

I'd take that one to your dealer and if they don't diagnose a problem, they can at least get a case started. That way, if a pattern of these issues develops, a TSB (Technical Service Bulletin) will likely come out and you'll get the fix. That's enough that I'd have them take a look.

Most of the manual transmissions I've ever had have had quirky noises somewhere in their operation. Again, though, yours seems enough to get it checked.

 

[Torero]

Thats

Mine has a small rattle (may not be a rattle, but that's the best description) when under very hard acceleration and a fast shift, right when the clutch engages. Right now I'm chalking it up to normal. If I don't dump the clutch so hard on the upshift, it doesn't do it.

I'd take that one to your dealer and if they don't diagnose a problem, they can at least get a case started. That way, if a pattern of these issues develops, a TSB (Technical Service Bulletin) will likely come out and you'll get the fix. That's enough that I'd have them take a look.

Most of the manual transmissions I've ever had have had quirky noises somewhere in their operation. Again, though, yours seems enough to get it checked.

That’s normal. Practice the shifts until you can make it without the noise. The noise doesn’t mean something is hurting but your timing is wrong.

 

[Trailhawk603]

Thanks for the feedback guys last manual transmission car I owned was a 2011 Mazdaspeed3 guess that’s what happens when you take a few years off and drive soulless automatics.

 

[DanW]

Thats


That’s normal. Practice the shifts until you can make it without the noise. The noise doesn’t mean something is hurting but your timing is wrong.

Yeah, I've learned to shift more smoothly and avoid it. That's why I really don't think it is a problem. OP's noise, at least from what I hear in the video, sounds a bit more pronounced. Maybe he can get it to stop with smoother engagement of the clutch, too.

You've got a nice long warranty period, in case it does turn out to be a problem, but like I said, clutches can have all kinds of strange mechanical noises.

 

[Torero]

When fast shifting, I can replicate the rattling noise in almost any gear, but also I can do it without the noise. It’s something like if I fast shift but but let the clutch out a bit slow it makes the sound. If I am as fast with the shifting as I am to let the clutch out, there is no noise. Hard to explain.

 

[Matthew/E36]

Thanks for the feedback guys last manual transmission car I owned was a 2011 Mazdaspeed3 guess that’s what happens when you take a few years off and drive soulless automatics.

My last car was a manual and I had some light grinding like your video. I'm more used to how it shifts and don't hear it anymore. Not that there couldn't be a problem with yours. Maybe you are over-reving, or too slow on the clutch release at that RPM?

The throttle response is pretty slow for me, so I had to get used to not blipping throttle to shift much...not sure how to explain it.

 

[Matthew/E36]

When fast shifting, I can replicate the rattling noise in almost any gear, but also I can do it without the noise. It’s something like if I fast shift but but let the clutch out a bit slow it makes the sound. If I am as fast with the shifting as I am to let the clutch out, there is no noise. Hard to explain.

That sounds about like what I was doing, so I think it makes sense.

 

[GaryNap111]

Hi all,

I’ve had my 6spd Sahara JL for almost 1000 miles and I truly am I in love with it. Could other manual owners take a listen and let me know if it’s back to service I need to go.

I am getting a clutch or tranny related rattle or grind on the 1 to 2 or more commonly 2 to 3 shift right around 3,000 to 4000 rpm letting the clutch up. If I slowly let the the clutch up it seems to help or shift higher or lower than the rpm range that produces the noise.

Caught it on video so other manual owners please help and take a listen.

I experience the same sound. Ive owned 3 manual JK's prior to my JL and never had that sound. Its pretty annoying actually, but if i baby it i can get it to shift without noise, but driving normally i hear it almost all the time, but definitely more the harder i drive it. It doesnt feel normal to me, Im ready to take it to the dealer. it seems like not many people have manuals so its hard to get much feedback.

 

[TheWingman]

Normal. Let your right foot completely off the gas pedal before pressing the clutch. Different from any other manual car i've had/driven, but you'll get used to it!

 

[DanW]

I've noticed something similar. Every manual transmission I ever had has had its own unique set of noises, vibrations, and behaviors. No two of them feel or sound the same. This one is still light years ahead of my JK. I've adjusted my clutching technique and can avoid it.

It is still the best clutch/tranny I've owned, so far.

 

[Chuck]

I have recently noticed this sound as well (manual Rubicon). It mainly happens like this: I accelerate hard (e.g., quickly getting on a highway), with RPMs going high within the gear, then I shift into the higher gear and give it a good bit of gas, as I continue to accelerate. The "rattle/grind" sound is brief, right as the clutch pedal is released and the gas pedal is depressed. Naturally, it's most noticeable from 2nd to 3rd, but I've also noticed it going from 3rd to 4th.

I'm no mechanic, but I wonder if it's just the synchronizers trying to "catch up," or straddle the gap, for lack of a better (i.e., technical) description. I also wonder if the Jeep's unique gearing ratios could have something to do with this. Just spitballing some thoughts here.

When my noise occurs, I may also be giving it too much gas -- either not letting up enough when I'm depressing the clutch and/or when I'm releasing it. I've owned 12 different manuals over 28 years, and I currently own 3, but this JL really doesn't seem to need much gas when going from one gear to another (you can even go into 1st pretty easily without any gas at all). After driving my JL for a few days, and then I drive one of my other cars, I nearly stall them sometimes because they require so much more gas. It's amazing how different some manuals are.

 

[Chuck]

As an addendum to my last post, I just wanted to say that this JL has one of the better manuals I've ever owned. Sure, it's got some questionable noises (I currently have a service appointment for a clutch creak), but overall I am quite impressed.

Initially, I was worried about this occasional grinding sound when upshifting, but I think it's normal, especially after reading this thread.

Like DanW says, every manual has its quirks, noises, etc. Fortunately, this noise isn't that loud, or even that noticeable. I think we're just a passionate bunch that fixates on every little blip ... because we're passionate about our Jeeps.

 

[Mosesdog]

Hi all,

I’ve had my 6spd Sahara JL for almost 1000 miles and I truly am I in love with it. Could other manual owners take a listen and let me know if it’s back to service I need to go.

I am getting a clutch or tranny related rattle or grind on the 1 to 2 or more commonly 2 to 3 shift right around 3,000 to 4000 rpm letting the clutch up. If I slowly let the the clutch up it seems to help or shift higher or lower than the rpm range that produces the noise.

Caught it on video so other manual owners please help and take a listen.

Horrible noise. This feedback should not be in a new vehicle with a manual transmission. I have been a service writer myself for 3 major brands. I just had my New JLU at the shop in Kennewick, WA. Staff at the dealership were able to let me try another manual Wrangler JL for comparison and it made the same 2-3rd grind and more noticeably 3-4 under acceleration. I wish I heard that noise more during trying the Jeep out initially. I have owned many manual transmission vehicles and this rattle/grind is a new one on me with little needed to initiate the grinding other than just merging onto the freeway.

 

[Mosesdog]

Has anybody have any updates regarding clutch/transmission chatter when shifting and accelerating?

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