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Old 02-08-2010, 06:36 PM   #1
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Manual Transmission/Spark Plugs...What do I need???

I have a 2002 Sport. I am wanting to change the manual trans fluid.
I don't know if it's normal, but when my foot is barely touching the clutch or pushed to the floor, (while the jeep is stopped) it gives off a whining sound. And it does it as well, while shifting through the gears when the jeep is moving.
Whether it's normal or not, I want to change the fluid. WHAT FLUID DO I ASK FOR AT AUTOZONE, AND HOW MUCH DO I PURCHASE?
Also, what is the part number for Champion brand spark plugs that I need?
I've read threads from Jerry B. about not getting those stupid, exotic, spitfire, splitfire, tripple pronged, spark plugs....and to get good ole Champions. What is the number on them? Thanks in advance.

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Old 02-08-2010, 06:41 PM   #2
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I get all my auto parts from the dealer.

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Old 02-09-2010, 10:50 AM   #3
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So you buy trans fluid and spark plugs from a Jeep dealer's parts dept? Is that truly necessarry?
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Old 02-09-2010, 11:00 AM   #4
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Can't give you the part numbers, etc. Go to your local auto parts store (Car Quest, NAPA, O'Reilly's, etc) ask for the Champion spark plugs for a 2002 wrangler with a 4.0 engine. Also ask how much transfluid you will need for your (manual or auto transmission). I recommend a full synthetic if running a manual transmission.
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Old 02-09-2010, 11:04 AM   #5
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It's not necessary to go to the dealer to get the right parts. Your NV3550 transmission is fussy about its gear lube but Royal Purple Synchromax is fine, so is Amsoil 75W-90. GM or Pennzoil Synchromesh meets the spec too but I'd rather use the RP or Amsoil.

Spark plug-wise, your newer distributorless engine is very picky about its spark plugs. You are safe to run pretty much any conventional spark plug the guide says for your engine but if you want the advantages of platinum, you have to be more careful. Two safe VERY good platinum plugs include the Champion 7034 or Autolite APP985 (but not AP985!).

Edit: As Bobthegod says below, a screeching/whining sound that only happens when you're stepping on the clutch pedal is normally the sign of a bad throwout bearing. The throwout bearing is what the clutch disk spins on when your foot is stepping down on the clutch pedal.
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Old 02-09-2010, 11:06 AM   #6
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I just did all this stuff on my 06 . . . I went with the NGK plugs and used Mopar Manual Trans Fluid from the dealership.
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Old 02-09-2010, 11:06 AM   #7
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Sounds like the throwout bearing is going out. Have a mechanic check for you if you don't know. Also if you go to one of those 10 minute oil changers they will change your trans fluid....very inexpensive. Good luck.
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Old 02-09-2010, 11:22 AM   #8
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Is the throw out bearing expensive to purchase and a pain to do yourself? Is it worth having it done by a mechanic? I'm barely a shadetree, doityourselfer.

Also, on the spark plugs, what does the gap need to be set at?
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Old 02-09-2010, 11:35 AM   #9
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Quote:
Originally Posted by t-bone n bixby View Post

also, on the spark plugs, what does the gap need to be set at?

35
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Old 02-09-2010, 12:19 PM   #10
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Quote:
Originally Posted by T-BONE N BIXBY View Post
Is the throw out bearing expensive to purchase and a pain to do yourself? Is it worth having it done by a mechanic? I'm barely a shadetree, doityourselfer.

Also, on the spark plugs, what does the gap need to be set at?
Per your owner's manual & the sticker by the engine, the gap is .035. The plugs should come pre-gapped to that however.

Replacing the throwout bearing requires the transmission be dropped, it's not an easy job by any means. It's about the same amount of work as replacing the clutch.
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Old 02-09-2010, 12:52 PM   #11
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I've searched for other questions concerning the throw out bearing. Seems like others are making a "winding" sound when their foot is OFF the pedal. Mine is quiet as a mouse, until I put ANY pressure on the clutch. I can barely touch the pedal, and hear the noise. The noise is at different pitches as I push more on the pedal, and if I barely raise it from the floor, it actually stops.
Now, here's the kicker.....I have owned this jeep for exactly a year now, and I noticed it when I bought it, but assumed it was somewhat normal since it shifted fine. Guess the best thing to do would be to just go ahead and buy the parts, and grab my mechanically inclined brother n law to spend a day with me and just do it. The jeep has 130G on it so it probably wouldn't hurt, and I can actually afford $150 for parts right now.
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Old 03-20-2010, 01:45 PM   #12
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Nobody in my area stocks the Autolite APP985 plug and only one place had the Champion 7034 plug. Oh yea and they are gapped to .045" stock so you need to reduce the gap to .035".

The plug is considerably longer than the Bosche +4 plug the previous owner put in the Jeep. I will post a picture later.
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Old 03-20-2010, 01:48 PM   #13
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It doesn't matter if it's longer or not, the 7034 is the right plug. The +4 from Bosche is the LAST spark plug I would install into a Jeep engine.

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