Transmission a no-go - Page 2 - PeachParts Mercedes-Benz Forum

blindwolf · #16 04-21-2008, 11:06 AM

I ordered a set of pressure guages and a DVD on a complete teardown and rebuild, if it comes to that. I rebuilt the TH350 on my truck, so I know that it can be rebuilt on my workbench, just hoping I don't have to.

BrewPeace · #17 05-01-2008, 11:44 PM

Will you keep this thread updated with your progress on this issue?

ARINUTS · #18 05-02-2008, 01:28 AM

sounds like worn clutches. slipping.

blindwolf · #19 05-02-2008, 07:36 AM

I set up the guages yeaterday and tried to run an operating pressure test. It barely put out 80 psi at idle and under acceleration, it would go backwards, down to about 20 psi. The rebuild kit is already on the way. I am not sure if it the front pump or a blown clutch seal, but as I tear it down I am sure what ever it is will be easy to spot.

tgingrich · #20 05-02-2008, 10:08 AM

"the torque converter just slides on or off "

That's the kind of optimism that usually gets me into trouble.

After I swapped the engine in my SD, I drove about 50 miles before it would no longer move. I have zero pressure so I thought the pump had failed, but the ears shearing off the torque converter didn't occur to me. I'm still too frustrated to tear into it, but that is something I will keep in mind when the urge to fix it strikes.

blindwolf · #21 05-02-2008, 10:17 AM

The torque converter does just slide on, but you have to seat it on the ears of the front pump or else something expensive is gonna give.

rs899 · #22 05-02-2008, 11:26 AM

Quote:

After I swapped the engine in my SD, I drove about 50 miles before it would no longer move. I have zero pressure so I thought the pump had failed, but the ears shearing off the torque converter didn't occur to me.

That's probably not going to happen with a 722.3xx that you have. It's the TCs on the early 722.1xx that have very weak ears.

Rick

blindwolf · #23 05-21-2008, 05:14 PM

I finally got the tranny dropped today. The top right hand mount bolt was a bear, but after removing the frame support bar next to the bellhousing, I got my movable head ratchet on it and now it is in the parts cleaner with the rest of them. I am going to give the tranny a good wash down this evening and start the teardown tomorrow morning.

blindwolf · #24 05-23-2008, 11:25 PM

I started the tear down and after just pulling the front pump and K1 clutch pack, have found a couple of problems. The driven gears in the pump are kinda sloppy from 25 years of wear and there is not any fiber left on any of the friction discs. I will probably replace the pump on principal and the rebuild kit has new friction discs. Tomorrow I will pull the B2 clutch pack and band and see what is left there.