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Old 02-19-2014, 02:22 PM   #1
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Hard shifting after engine replacement?

Exactly as the title says. I just got my engine replaced (at 4.0) and now it's hard to shift and it grinds when I try going into reverse. Is it something that needs to just be worn in since it's a new engine?

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Old 02-19-2014, 02:39 PM   #2
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NOT "something that needs to just be worn in since it's a new engine". There is an issue somewhere.

Q: Was it a direct swap or previously a 2.5?
Q: Auto trans or manual?
Q: If 4.0 to 4.0 swap, were the same motor mounts used?

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Old 02-19-2014, 03:49 PM   #3
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4.0 to 4.0 it's a manual and same motor mounts
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Old 02-19-2014, 04:21 PM   #4
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did you do the install yourself? Check your clutch fluid level to make sure that the slave cylinder was not cracked or broken during engine removal/installation
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Old 02-19-2014, 06:21 PM   #5
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did you do the install yourself? Check your clutch fluid level to make sure that the slave cylinder was not cracked or broken during engine removal/installation
No I had a shop do it, how do I check the fluid level?
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Old 02-19-2014, 06:51 PM   #6
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Open your good and look to the right (looking in) you will see a small reservoir beside the brake booster. That is the clutch fluid reservoir.
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Old 02-19-2014, 10:56 PM   #7
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Yeah its full. I just don't get how it could work fine before I get the engine replaced, then suck after
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Old 02-19-2014, 11:15 PM   #8
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I would take it back to that shop and make them fix it before I started messing with it. The clutch is between the engine and trans so there is a great possibility they messed something up.
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Old 02-20-2014, 12:39 AM   #9
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Could be not properly tightened tcase skid
Bolts. Doubt it but takes a quick second to look and have seen it happen. Good luck
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Old 02-20-2014, 05:16 AM   #10
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Could be not properly tightened tcase skid
Bolts. Doubt it but takes a quick second to look and have seen it happen. Good luck
I will check it out! Majnoon, I have a feeling your stalking me now
Just kidding

But also an update! I was out all night fishing and let my jeep cool down, the gears seemed to change smoother for like 3 minutes after start up, or until it heated up a bit. Also when I was a stop light on a hill, I put the jeep in neutral and let off the break, instead of gravity doing its thing and me rolling backwards, the jeep creeped forward a bit and then stopped as if I applied the breaks. The rpms didn't change at all and I couldn't replicate it.
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Old 02-20-2014, 09:58 AM   #11
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Now I'm thinking the clutch that was installed is no good or it was installed improperly. The hard shifting combined with your drift makes me think that your clutch isn't disengaging fully when you depress the pedal. Take it right back to the shop. I think the best case is maybe air bubbles in the slave cylinder or a mis-aligned shift linkage. Otherwise it needs to come apart.
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Old 02-20-2014, 10:07 AM   #12
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The hard shifting combined with your drift makes me think that your clutch isn't disengaging fully when you depress the pedal. Take it right back to the shop.
^^^This^^^
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Old 02-21-2014, 12:44 AM   #13
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Now I'm thinking the clutch that was installed is no good or it was installed improperly. The hard shifting combined with your drift makes me think that your clutch isn't disengaging fully when you depress the pedal. Take it right back to the shop. I think the best case is maybe air bubbles in the slave cylinder or a mis-aligned shift linkage. Otherwise it needs to come apart.
I hope it's something as simple as that but the clutch wasn't replaced
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Old 02-21-2014, 12:45 AM   #14
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A
So update, I'm super pissed, I found a puddle of oil under my jeep after work, now whether it was motor or gear, im not sure. Both the oil pan and the front of transmission was wet
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Old 02-21-2014, 07:36 AM   #15
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If the front seal in tyranny leaks it can contaminate clutch and make it slip

Engine rear main seal can also put lubricant inside the bell but it is in front of the flywheel and does not get on clutch disk so does not contaminate the clutch
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Old 02-21-2014, 07:41 AM   #16
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The whole thing makes little spence as he said it crept uphill in neutral and if it really was in neutral clutch dragging or even fully engaged would not make a difference in neutral

If it was in gear with pedal full down then a dragging clutch might propel vehicle a little

Once a fellow had a clutch that would not disengage because he installed the clutch pad inverted ( wrong side toward the flywheel)
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Old 02-21-2014, 09:11 AM   #17
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Simple test to see if clutch is dragging

Park on level ground and verify with engine off tranny in neutral and park brake OFF that vehicle does not roll forward or back

Leave park brake off place tranny in 1st (where engine has max leverage over wheels) depress clutch fully and keep foot off brake pedal. Crank and see if jeep moves forward at all (if it does clutch is dragging)

If it does drag try again first pumping clutch full down 5 times and holding down on 5th pump again crank starter and if this time does not move may be air in clutch hydraulics.
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Old 02-21-2014, 10:49 AM   #18
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I hope it's something as simple as that but the clutch wasn't replaced
When he switched engines, he removed your flywheel, clutch and pressure plate from the old engine and put it on the new one. He could have screwed it up and like digger says he could have put the clutch disk in backward. That would cause it to drag and my kill your pilot bearing in the flywheel.

Not to rub it in but a new Luk clutch kit is under $100. You should have had it replaced. There would be no extra labor.
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Old 02-21-2014, 01:02 PM   #19
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I'm going to run through and read all the new posts, but I first I want to share how incredibly stupid this guy is. "oh no, it's shifting fine!" as he shoves the shifter into first gear, trying to make it seem like he wasn't trying.
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Old 02-21-2014, 01:06 PM   #20
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The whole thing makes little spence as he said it crept uphill in neutral and if it really was in neutral clutch dragging or even fully engaged would not make a difference in neutral
what do you mean by this? Just to clarify, it was in neutral, clutch out and when I took my foot off the brake it crept forward, but it only did it that once, and yes, before someone asks, I was at a complete stop when I let off the brake.
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Old 02-21-2014, 01:08 PM   #21
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When he switched engines, he removed your flywheel, clutch and pressure plate from the old engine and put it on the new one. He could have screwed it up and like digger says he could have put the clutch disk in backward. That would cause it to drag and my kill your pilot bearing in the flywheel.

Not to rub it in but a new Luk clutch kit is under $100. You should have had it replaced. There would be no extra labor.
Does that kit include all of those pieces mentioned above including the pilot?
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Old 02-21-2014, 01:21 PM   #22
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The whole thing makes little spence as he said it crept uphill in neutral and if it really was in neutral clutch dragging or even fully engaged would not make a difference in neutral

If it was in gear with pedal full down then a dragging clutch might propel vehicle a little

Once a fellow had a clutch that would not disengage because he installed the clutch pad inverted ( wrong side toward the flywheel)
so i just read somewhere tthat if the clutch disc was insttalled backwards then it would hard to shift when the jeep was on but easy if it was off, i just tested it out and BAM!!! thats exactly what it is. is that a symptom youve heard before?
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Old 02-21-2014, 02:15 PM   #23
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Does that kit include all of those pieces mentioned above including the pilot?
Pilot is usually separate.
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Old 02-21-2014, 02:18 PM   #24
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Pilot is usually separate.
A Luk clutch comes with pressure plate, clutch plate, throw out bearing, pilot bearing, and alignment tool...$93 here: 1994-1995, 1997-2006 Jeep Wrangler Clutch Kit - LUK 05-065 - - PartsGeek.com
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Old 02-21-2014, 02:34 PM   #25
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Thanks I'll look into that if my clutch is screwed up! Any more thoughts on this whole backwards clutch thing? Does that sound like a symptom?
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Old 02-21-2014, 02:42 PM   #26
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Thanks I'll look into that if my clutch is screwed up! Any more thoughts on this whole backwards clutch thing? Does that sound like a symptom?
I've never seen one first hand on a Jeep that was installed backwards (and not even sure if it would be possible) On some other makes the springs on the the clutch plate drag the flywheel/crankshaft bolts, and on some the plate hub doesn't even fit in the bolt recess on the flywheel side, so I'm just not sure. If some one had a loose flywheel and clutch plate laying around, they could probably tell you if it was possible. Bottom line is, if the clutch worked fine before the engine swap, but not after, they should be responsible for fixing it.
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Old 02-21-2014, 02:44 PM   #27
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Please do the simple test in post 17 and report what happens

Quick easy and free just a couple minutes of your time
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Old 02-21-2014, 10:04 PM   #28
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Please do the simple test in post 17 and report what happens

Quick easy and free just a couple minutes of your time
Yeah I tried, I couldn't replicate it, I'll try again after work and update
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Old 02-22-2014, 09:39 PM   #29
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It doesn't roll forward in neutral
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Old 02-22-2014, 09:48 PM   #30
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Then clutch is not dragging any significant amount and is probably adequately disengaging

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