LMM: LMM with 222,000 tear down rebuild

malibu795

misspeelleerr
Apr 28, 2007
8,231
548
113
42
in the buckeye state
And we all know the word "easy" does not apply to a Duramax at all lol. :roflmao: Really hope to see you get it figured out Adam, and your luck to turn around.

Common...I got 29 pages of "easy" :roflmao:

Just picked up a Transtar A7XL ran similar but higher stall(2000) in the 4l85 after the OEM on broke the TCC piston..

Hopefully this A7XL is close to what the 99 had in the 4l85 from factory (16-1700), I'll know as soon as a have a good part throttle 1-2 shift ;)
Also putting mike L 290psi pump spring and JR shift kit with trim valves... Love to do clutches but lack of funds..

And no I don't expect tripple disc performance out of a billet single either...it will get me down the road... It's better then factory and factory last 280,000 miles of which ~190k of that I put on it towing at ~400/800 rwhp/tq
 

PureHybrid

Isuzu Shakes IT
Feb 15, 2012
3,492
472
83
Central OH
Have you cut open a trans filter? More than just a clutch can go bad in a converter, as I'm sure you're aware.

Every time I hear a rubber isolated damper going bad they make a knocking noise, more or less.
 

malibu795

misspeelleerr
Apr 28, 2007
8,231
548
113
42
in the buckeye state
Have you cut open a trans filter? More than just a clutch can go bad in a converter, as I'm sure you're aware.

Every time I hear a rubber isolated damper going bad they make a knocking noise, more or less.

No I haven't. Last spin on change there was barely anything on the magnetic.. Yes I'm aware..

Phil talloy of DPC called me back.. He made pretty good point... If the TC is going bad it's going to carry-on regardless what gear its in..

Kinda make me second gues buying the TC... Other hand Transtar isn't open on weekends and it would be much to run in and return it Monday plus they are only place local AFAIK that had one in stock..

Got alot to-do this weekend.. Almost the complete underisde is coated in oil plus find the noise..
 

Awenta

Active member
Sep 28, 2014
4,090
2
38
CT
Sump filter for converter material not the spin on.

Sent from my SM-N910V using Tapatalk
 

WolfLMM

Making Chips
Nov 21, 2006
4,005
25
48
38
AL
No I haven't. Last spin on change there was barely anything on the magnetic.. Yes I'm aware..

Phil talloy of DPC called me back.. He made pretty good point... If the TC is going bad it's going to carry-on regardless what gear its in..

Kinda make me second gues buying the TC... Other hand Transtar isn't open on weekends and it would be much to run in and return it Monday plus they are only place local AFAIK that had one in stock..

Got alot to-do this weekend.. Almost the complete underisde is coated in oil plus find the noise..

Depends on what part of TC is bad... If clutch problem, it will show up in the higher gears 5,6 before the lower. Engine has more leverage against tcc in the high gears, so to speak.

After the videos you've posted, I'd have blown that TC to hell. No way I could drive one that loose.
 

malibu795

misspeelleerr
Apr 28, 2007
8,231
548
113
42
in the buckeye state
Depends on what part of TC is bad... If clutch problem, it will show up in the higher gears 5,6 before the lower. Engine has more leverage against tcc in the high gears, so to speak.

After the videos you've posted, I'd have blown that TC to hell. No way I could drive one that loose.

The part that doesn't make sense... Once I get past 1900 the problem stops like a switch being turned off.. TC is in lockup drove around yesterday in normal mode.. Does it but not near as bad in unlock
My mind is stuck if its clutch/rotational item.. If its failing at low rpm/throttle it should be more prominent at heavier throttle and higher rpm.. Right?

Just trying to go through trouble shooting chart before I go and spend, 5-6 hours on my back pulling the tcase and transmission.. Which I'm not really looking forward to doing lol
 

malibu795

misspeelleerr
Apr 28, 2007
8,231
548
113
42
in the buckeye state
Is it possible that you have a cracked flex plate? Seems I have read about them causing strange vibration problems.

IDK... never had a broken flexplate that I could still drive..
Did this on my 99 LBZ/4L85. This resulted in me being towed
616718_4013952300767_864947151_o.jpg

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malibu795

misspeelleerr
Apr 28, 2007
8,231
548
113
42
in the buckeye state
Found these in the sum filter some aluminum shavings and a piece of plastic...
12631311_10207659268133312_2886988363979037046_n.jpg

Need a new engine spider
12654273_10207659268693326_7649494820110040749_n.jpg

Some how two bolts on 12 and 2 o clock exceeded their yeild strength.. Two where loose and two where still tight.. No cracks in tail shaft housing
12654569_10207659268853330_240222736866578486_n.jpg


Mikes pump mod set at 290 psi, pump plate drilled, Jr kit installed seperator plate drilled both deburred. Pump worn but tight no slop in gears. Kinda expect that with 280k on it.