722.1xx help in W116 needed - Page 6 - PeachParts Mercedes-Benz Forum

pawoSD · #1 10-15-2007, 07:41 PM

I think when I have to pull/install my tranny someday (not a while yet, still runs fine) I will pull the engine/tranny as a unit, do some service to the engine, bolt the new tranny on, and lower them back in as a unit.

winmutt · #2 10-14-2007, 11:04 PM

I've pulled 4 transmissions in my life. Generally they aren't that hard IMO. Just big and bulky, I would guss rebuilding to be much harder (dont know and dont want to know). I do know the top bolts with a 617.952 required me to hump the engine. HUGE PITA. Probably alot easier to pull eng + tran and do the bolts after

dunl · #3 10-14-2007, 11:18 PM

I hear ya about the top bolts. That's where a 3in extension on your socket becomes your best friend.

Unfortunately, the biggest pain in the head for me was the top bolt on the crossmember on the passenger side....it never did come out, so the tranny was pulled with that still in place hanging down on one side. Spent 1.5 hours on that bolt.

Mental note - remove the top bolts first on the crossmembers, and then the bottom bolts.

I did find that the torque converter bolts were the easiest...had all six out in about 5 minutes. I was used to turning the engine with the 27mm socket from previously draining the torque converter.

Yeah, rebuilding....think I will pass on that one. Too much effort for the result gained when you can swap, but I bet it's gratifying to have completed that task.

How much easier is the engine going to be with the tranny out?

winmutt · #4 10-15-2007, 07:55 AM

Quote:

Originally Posted by dunl

How much easier is the engine going to be with the tranny out?

IIRC the FSM recommends removing both at the same time.

babymog · #5 10-16-2007, 10:32 PM

I'm pulling engine & transmission together from my parts car. Reason? Because I can leave the transmission full of fluid and the seals are more likely to be in good condition when I need it.

dunl · #6 10-17-2007, 12:49 AM

If I needed both, I would have pulled both, but i just needed the tranny.

I'm pulling the engine because I can, and I won't let it go to scrap.

As for a hoist, I picked up one $75 a few weekends ago.

charmalu · #7 10-17-2007, 01:53 AM

I just pulled my eng and trans in July and replaced the new eng and trans
in Aug. did it by my self. not a big deal. be sure to remove the torque
conv bolts before you remove the eng, much easier.

If you have a parts car, remove the radiator, cut out the front piece,
and you don`t have to lift the eng so high. straight shot out the front.

Next time Iam going to put the trans hard lines on before I install the eng
in the car. that was a PITA.

Charlie

TwitchKitty · #8 10-17-2007, 12:39 PM

Removing and replacing parts makes you a parts-swapper, not a mechanic. Mechanics have to work with their hands but it is what they do with thier brains that distinguishes them from the wanna-be's. Troubleshooting cars is the same process as troubleshooting airplanes, computers, nuclear power plants, economic systems, or human bodies.

dunl · #9 10-18-2007, 12:15 AM

Quote:

Originally Posted by TwitchKitty

Removing and replacing parts makes you a parts-swapper, not a mechanic. Mechanics have to work with their hands but it is what they do with thier brains that distinguishes them from the wanna-be's. Troubleshooting cars is the same process as troubleshooting airplanes, computers, nuclear power plants, economic systems, or human bodies.

Well, I hope I get at least some points for all I did to try and distinguish the problem ahead of time before finally breaking down and replacing the tranny.

And if I had a shop do it, do you think a "parts-swapper" would do it for me, or a "mechanic"?

TwitchKitty · #10 10-20-2007, 03:34 PM

Quote:

Originally Posted by dunl

Well, I hope I get at least some points for all I did to try and distinguish the problem ahead of time before finally breaking down and replacing the tranny.

And if I had a shop do it, do you think a "parts-swapper" would do it for me, or a "mechanic"?

You get all types working at car shops. When you get your car working, take it to a shop and tell them about your work. They will probably hire you.

Cervan · #11 10-22-2007, 12:46 AM

tranny is nothing compared to an engine swap. The hardest part about a tranny dismount/mount is when you go back to mount it up again getting the splines lined up. everything else is easy as pie.

dunl · #12 10-22-2007, 11:08 AM

So what makes removing the engine more difficult?

Cervan · #13 10-23-2007, 04:17 PM

Quote:

Originally Posted by dunl

So what makes removing the engine more difficult?

For one you have random connections to the engine that you must connect, (Wires, fuel, exhaust, intake, cooling system, air conditioning, etc) Then you have to mate the engine with the tranny. after its mated with the tranny you have to put the engine onto its mounts and start wiring everything back up. its a rather large job compared with the simple unbolting of eighteen same sized bolts lowing the transmission and then putting it back up and putting the bolts back into its place. And if the engine is being rebuilt while its out, it would complicate things also.

dunl · #14 11-17-2007, 11:04 PM

Well, thank you all so much for all your help with the removal and replacement of the tranny in my 1980 300sd. I finished replacing it last weekend, only to find that the vehicle wouldn't move. Suggestions were possible linkage in the valve body which I had previously had out, broken fingers on the torque converter, or an unseated torque converter.

Well....turned out to be none of those, but simply a forgetful novice mechanic. I pulled the pan tonight, and before dropping it, I could hear something in it - NOT GOOD!

Dropped the pan to find 4 - COUNT `EM, F-O-U-R - valve body bolts in the pan!

When I put the valve body on the tranny initially, I put the bolts in finger tight. Next day, I came out and put the pan on - but forgot to torque up those bolts!

Torqued them up, reinstalled the pan, filled her up, and took her for a short drive. The clip that hold the shifter linkage has come off, and needs to be replaced I think, but other than that, she seems to be working fine.

I could thank everyone personally who has helped me with this, but there's a million posts and too many members to count. I won't single anyone out because if I forget someone, then that wouldn't be fair either.

So please, if you think you may have helped me in any short and small way with any suggestion, or know for a fact that you did, thank you so much for taking the time to help me out. I still think in all my years of the internet that this is one of my favorite forums, and it's simply because of the calibre of membership here.

I'll post next the entire list of threads pertaining to this, and close off those threads with a redirection here, hopefully tieing it all up in a nice little package of info for the next w116 tranny newbie.

Thanks again, and happy wrenching. I'm off for some Bushmills.

rs899 · #15 11-18-2007, 06:38 PM

Dunl-

Fantastic. I am glad you had a happy ending- without removing the tranny to find out what it was.

Whatever made you think to drop the pan this last time?

Rick

PS.

I really like the way you tied up all the threads. I wish everyone would post successes

(or failures

) so that we would learn WHAT WORKS.