Pzj77 Flywheel Trouble?

[outfitter taco]

I've only put on 1100 km on the vehicle since I bought it, so I'm still learning the nuances of this particular truck and its different vibrations etc. Yesterday, when leaving from work, I started it up, let the oil pressure build, and drove away slowly. I heard what sounded like "two cats fighting in a coffee can" coming from mid-ship/rear portion of the vehicle. This continued intermittently for two-three minutes and then stopped. I wasn't able to get out of second gear (because of traffic, not mechanical). I haven't been able to reproduce it since. In the short time that it happened I was unable to find any triggers that would incur the noise again. The manual transmission functions as it should. But I was reading here on Mud that there might be a weak point with the flywheel in this model (thanks Petzel) and that others have seen failure at around 150k. I have 156k on the odometer now. What are some of the other symptoms with flywheel blowing springs etc.? My transmission is the R151. Hopefully, this is just something wrong in the exhaust, as it is making the high pitched "put put put" above 2400rpm that sounds like I'm Captaining a vehicle out of the "Jetsons". Any advice would be appreciated.

 

[Petzel]

Hope others can chime in as well, but when my flywheel was starting to go south it would randomly make the craziest noise. One time before i found out about the flywheel issue, i pulled over and called a tow truck only to realize later that the noise was gone. It sounds like something is going to blow with its high pitch rattle/scrape/fling/cat fight. I think what happens is a broken spring finds its way out of place and sails the high seas of the flywheel until it rests at the bottom of the bell housing. When i split the BH off the engine all sorts of little pieces fell to the floor confirming my suspicions!

Your flywheel is a goner. sorry. it sucks.

 

[crushers]

rattling
banging can be an issue
more vibration in shifter

when i get time i am goign to try and source replacement springs ... but that won't be for a while.

 

[john_d]

When the DM flywheel in my PZJ70 gave up I had it welded. I also used a sprung Isuzu clutch.

However, a few weeks later the gearbox started to make a rattling noise when in neutral. Recently, I bought the expensive DM flywheel and had the welded flywheel replaced.

I've yet to try things out as the vehicle is undergoing an engine rebuild and paint job as well.

 

[ForealBoreal]

those dame r151s!
Time to buy an H55f....