Preventing Burned Clutches - PeachParts Mercedes-Benz Forum

Adriel · #1 10-21-2014, 11:36 PM

Like y'all's opinion on this. My preference is not to have barb fittings, as leery of them popping off. Further, the external cooler be mainly due to me burning up the clutches, and don't want to do that again. Figure when it gets below 64*F use cardboard to block the cooler?

So, is both sides of the transmission hose the same size?

This is the plan I like to have critiqued:
supply (driver's side) hard line, 16mmx1.5 to AN6 adapter, braided high pressure hose (braided to protect against the belts), AN6 to 3/8"NPT on the external cooler. Then the fluid goes through the cooler. AN6 to 3/8" adapter, AN6 hose, 16mmx1.5 to AN6 adapter on internal oil cooler. The fluid then goes through the internal oil cooler, so as picks up engine heat, allowing the transmission to have proper, quick, warm up.

Only concern is the AN hose.Other option is have a couple hoses made up.

eatont9999 · #2 10-22-2014, 11:02 AM

The correct transmission cooler hose is available online and the OE version has a spring coiled on the outside of the hose to prevent it from being cut. If the trans is operating properly, there should be no need to block anything off or modify the cooling system.

fahrvergnugen · #3 10-22-2014, 11:30 AM

Beg pardon, but I believe the spring is there to help prevent the hose from kinking.

Adriel · #4 10-22-2014, 11:53 AM

Quote:

Originally Posted by eatont9999

The correct transmission cooler hose is available online and the OE version has a spring coiled on the outside of the hose to prevent it from being cut. If the trans is operating properly, there should be no need to block anything off or modify the cooling system.

Eaton, thank you so very much for your help! If heat didn't cause the clutches to burn, and no coolant in the A.T.F. or vise versa, then why is there burned clutch in the A.T.F. I drained?

The transmission now shifts odd when going in out out of first. Fluid level is good, and has mostly been (small leak which I need to address A.S.A.P.). Basically, doesn't perform as it did when I got her back in 2012.

Zacharias · #5 10-22-2014, 12:04 PM

Quote:

Originally Posted by Adriel

The transmission now shifts odd when going in out out of first.

You need to explain "odd" in more detail.

Quote:

Originally Posted by Adriel

Basically, doesn't perform as it did when I got her back in 2012.

How many miles on the car now?

What did the transmission fluid look like (colour) when you got the car?

Adriel · #6 10-22-2014, 12:14 PM

Quote:

Originally Posted by Zacharias

You need to explain "odd" in more detail.

How many miles on the car now?

What did the transmission fluid look like (colour) when you got the car?

Zacharias, thank you so very much for the help!

By odd, soggy, unsure. It's like it takes a moment to settle in to gear, but not a full true flare, though have had a few of those (fluid low most times). Turning the T key a notch helped (Tram's suggestion).
There is just over 298,000, so getting up there for a transmission. Thus why I bought a used one; need to just pick it up from Oregon.

The transmission fluid had been just changed, so the nice bright red color. Then over time went to schwarz braun. Been so busy not sure when. Instead of it having the nice smell, it has a nasty burned smell that stayed on my hands for the whole day.

97 SL320 · #7 10-22-2014, 04:07 PM

Quote:

Originally Posted by fahrvergnugen

Beg pardon, but I believe the spring is there to help prevent the hose from kinking.

External springs are for object impact resistance to prevent hose damage.

This is also done in various steel lines on some cars to prevent denting.

vtmbz · #8 10-23-2014, 11:18 PM

From reading your two threads I would say your fluid levels are too low. It is critical that the fluid level be within spec; I might be way wrong, but IMHO burnt clutches are casued by a low fluid level not by hot fluid.

You do not want leaks of AT fluid, not any, not ever.

Adriel · #9 10-24-2014, 04:50 AM

Quote:

Originally Posted by vtmbz

From reading your two threads I would say your fluid levels are too low. It is critical that the fluid level be within spec; I might be way wrong, but IMHO burnt clutches are casued by a low fluid level not by hot fluid.

You do not want leaks of AT fluid, not any, not ever.

Thank you so very much for the help.

Fluid level was fine, if not over full. It only got low after I changed the transmission fluid. Tomorrow that will be remedied when I add six quarts of A.T.F..

layback40 · #10 10-24-2014, 09:02 AM

Quote:

Originally Posted by vtmbz

From reading your two threads I would say your fluid levels are too low. It is critical that the fluid level be within spec; I might be way wrong, but IMHO burnt clutches are caused by a low fluid level not by hot fluid.

You do not want leaks of AT fluid, not any, not ever.

10/10 you are correct. Hot fluid is fine. Low fluid or moist fluid will kill plates. Drive ~10 miles in traffic with trans changing up & down on an old trans low on fluid & it will be in trouble.