getrag 284 driving impressions

[skalor]

Well, I took my TGP out for a test ride last night. I just wanted to know if I should worry about anything as I have a couple of concerns. First, my clutch pedal needs to go to the floor for the clutch to disengage(no accumulator/used air brake hose) and my clutch hydralics are properly bled. I even had to remove all the padding underneath the pedal to get the extra little movement otherwise it wouldn't disengage all the way, is this OK? Second the clutch seemed really chattery, are 284 clutches really chattery when they're breaking in?? Third, my 284 seemed noisy to me. I don't think it's anything out of the ordinary, but it seemed louder than any other FWD manual tranny I ever drove.

All of the syncros seem to be in decent shape. I was worried about them when I first started driving it, but they got better and better the longer I drove. I haven't made the manual chip yet and I haven't rewired the park/neutral safety switch so I left it in park so it would start, but park/neutral has a 3000 rpm rev limiter!! It really wasn't a problem though as the car got going just fine with it and it kept me from pushing the gas more than 1/3 of the way down.

[brian89gp]

There is varience on where the clutch disengages from car to car, though yours seems excessive, yours might be like that due to the master cylinder mounting or possibly the MC itself. The 284 is a bit noisy especially with the clutch out and it in neutral. Mine is noisy enough that people look over at me strange at stop lights, oh well.

[dykz34]

I can agree with you on the 284's loudness. I've heard them before that sound like they are rattling apart inside. But I believe it's only the play in the gears on the shaft vibrating that makes the noise. I wouldn't worry about it--mainly because you can't do anything about it.

[CNCguy]

I've found that excessively worn pilot bushings will cause hard engagement and chattering. When it is extremely sloppy, the input shaft sags down allowing the clutch disk to become out of parallel with the flywheel face. It then requires more pressure plate/clutch pedal travel to get it to fully release. Usually happens with higher milage vehicles.

Marc

[jmgtp]

Weird... my 284 is I think the most quiet manual trans I've ever heard! (or should I say not heard?) With the exception of idling in neutral, then the clutch chatters a bit. Otherwise the trans doesnt make a peep! Well ok... if you slam gears at 7k you can hear it make that clap sound, but that may even be the clutch engaging. I notice that most fwd and a lot of rwd trans when shifting through the gears at a stop sound kinda clunky but mine doesnt seem to do that. My getrag 282 in comparison is a much louder trans. :P

[jmgtp]

I've found that excessively worn pilot bushings will cause hard engagement and chattering. When it is extremely sloppy, the input shaft sags down allowing the clutch disk to become out of parallel with the flywheel face. It then requires more pressure plate/clutch pedal travel to get it to fully release. Usually happens with higher milage vehicles.

Marc

dont think the 284 uses a pilot bushing... could be wrong

[Juglenaut]

I've found that excessively worn pilot bushings

Are you talking about the
pilot bearing in the flywheel??

Yes they do almost all manual have pilots.

If the tranny is out of aline the pressure plate/clutch plate splines are not centered over the flywheel the splines need to be exact not much room for error or a damaged pressure plate or worse can happen fast!!. Take it back to have re-alined that must not have done it...You should not have to pay for them to aline it>>IT IS procedure on almost all manuals. It will do what you are experiencing.

A J-35822 (varies by application) J-38688 (Getrag 284) or equiv is required to aline the assembly.



A little throw out bearing noise is all I get in neutral sometimes usually when hot and only when the clutch is disengaged. Very sutle noise>>I get more lifter noise from my engine than the tranny.

[brian89gp]

I have no idea what you just said.

[jmgtp]

I think he's talkin about the clutch alignment tool.

I've never heard of a pilot bushing for a 284.

[CNCguy]

I have to say that I've never seen a 284 but I have never seen a manual tranny without a pilot on it. Its the round diameter on the end of the splines that goes into the end of the crank. One end of the input (splined) shaft is supported by the pilot, the other end is supported by the front bearing in the trans. They always have a bushing or bearing in the end of the crank, if not it would be steel rubbing steel when the clutch is disengaged.

Like I said, I've never seen a 284 but I've been working on cars for 30+ years.

[brian89gp]

I think he's talkin about the clutch alignment tool.

I've never heard of a pilot bushing for a 284.

Thats what i was thinking, just couldn't figure why you would re-align it. Its a one time deal just so you can get the transmission mounted, after that every time you press the clutch the disc re-aligns itself on its own.

CNCguy, 284 doesn't have that. Don't think the 282 does either.

[skalor]

My clutch kit did not come with a pilot bushing/bearing and I've heard that both getrag 282s and 284s don't use a pilot bushing/bearing.

When I was putting my tranny on the engine it was the easiest manual tranny install I've ever done. Most times you get in on and have to give it a little wiggle until the splines match up and the trans slides all the way on. When I put my on, it slid all the way on first try...it was weird(and yes the splines on the clutch disc matched the tranny input shaft) :P

[Juglenaut]

Okay it is the bearing in the flywheel and yes they do trust me. It can't just be steel on steel, it just has have be something there, otherwise mabey your pressure plate or flywheel is defective, possibly it is junk. I contacted GM and they told me, after getting transfered a million times, that yes it is procedure to aline the assembly> a worn flywheel, pressure plate, driven disk can cause engagement problems.

Name your parts that are on the input shaft Skalor... You are having problems am I right is this not the reason you post...I think you installed it wrong, and now you need a new pressure plate, clutch disk, and flywheel.


Is this tranny a new rebuilt, a yard find, etc.................


One more thing, the bearing/bushing pilot is built into the flywheel. either the metal that is in direct contact to the input shaft is hardened heavier than the input shaft or it is a actual bearing or bushing soft material either the same color of the flywheel material or bronze, brass.

[skalor]

Okay it is the bearing in the flywheel and yes they do trust me. It can't just be steel on steel, it just has have be something there, otherwise mabey your pressure plate or flywheel is defective, possibly it is junk. I contacted GM and they told me, after getting transfered a million times, that yes it is procedure to aline the assembly> a worn flywheel, pressure plate, driven disk can cause engagement problems.

Name your parts that are on the input shaft Skalor... You are having problems am I right is this not the reason you post...I think you installed it wrong, and now you need a new pressure plate, clutch disk, and flywheel.


Is this tranny a new rebuilt, a yard find, etc.................


One more thing, the bearing/bushing pilot is built into the flywheel. either the metal that is in direct contact to the input shaft is hardened heavier than the input shaft or it is a actual bearing or bushing soft material either the same color of the flywheel material or bronze, brass.

First of all if there was a pilot bushing/bearing it would be in the crankshaft and not the flywheel. Even if I wanted one who would have one(GM didn't). Not that I couldn't just make have one made at my work(machine shop) out of oil-impregnated brass or something similar. Also, I had the flywheel turned down at my work and it was perfect when I installed it. I did align the new pressure plate/clutch disc I put in with an alignment tool. that came in the clutch kit.

I started the thread because I wanted to know what other getrag 284 owners thoughts were on my experiences not because I think there is something wrong with my flywheel/clutch. If there's anything wrong is was with my clutch master/slave setup as I used air brake hose to replace the accumulator and it just failed so that is what's to blame for the pedal travel issue.

[SappySE107]

There is no pilot bushing. There is a throw out bearing and thats it.