6L90 pan drop at 269,000 miles

[Snagglefoot]

I have a 2008 Chev Suburban 2500 with 269,000 miles on the original 6.0 liter engine and 6L90 transmission.The transmission has a slight delay when put in reverse. I normally do a pan drop, replenish 6 quarts every and replace the filter every 50,000 miles. Today, I wanted to check for any unusual wear materials on the magnet.

Here are some photos from the pan drop. There was a minimal of wear materials on the magnet and the existing Dex VI was still a very bright red. I put in a new filter and reused the AC Delco pan gasket. I filled it 4 quarts of Mobil Dex VI plus two leftover quarts of Dexron VI. The last shot shows the pan buttoned back up. Enjoy the shots.

 

[TomYoung]

The transmission equivalent of short OCI.

 

[oldhp]

Boy that maintenance thing works!!!

 

[redhat]

Boy that pan sure looks clean, good maintenance intervals on that thing... sure seem to be helping. Good mileage on that thing so far.

 

[loneryder]

Did it shift better after the change?

 

[Snagglefoot]

Did it shift better after the change?

There was no difference in the shifting and it still had a delay going into reverse. I need to do more research on that.

 

[supton]

There was no difference in the shifting and it still had a delay going into reverse. I need to do more research on that.

Worn valvebody? its no longer new and all. Some seal needing to expand or something.

Just means it takes longer to do those reverse drops when leaving home in a hurry. Might have to start taking it easy going forward (certainly in reverse).

 

[Snagglefoot]

Here is a shot of the Mobil Dex VI I used.

 

[The motor guy]

Stick it in neutral first for a few seconds, then try it. Does this transmission flow fluid in park? Could be a check valve or something like that.

 

[Wrenchturner44]

It may be one of the drums. Watch first part of this video.

 

[The motor guy]

It may be one of the drums. Watch first part of this video.

This is what I hate about transmissions. Gotta remove it and tear down the whole thing to figure out what's wrong.

 

[clinebarger]

It may be one of the drums. Watch first part of this video.

Early model 6L90 3-5-R drums are the worst for cracking.

If the 2-3 shift & 4-5 shift is good....The Drum & 3-5-R clutch is likely good.

3-5-R is the driving component in Reverse, The Low/Reverse Clutch is the holding component & I've seen early model 6L80/6L80 burn L/R frictions....GM updated the L/R friction material.

 

[AdmiralYoda]

Have you tried something simple like adding some Lubegard red or platinum? Sometimes these additives help with older transmissions. But if something is worn out or broken no additive will fix it.

 

[Snagglefoot]

So far all the forward gear shifts and downshifts are smooth, including those shifts using the manual shift selector. When I put it in reverse I have to wait an extra second or two it to make the shift. If I forget and give it gas too soon it will make an abrupt hard shift.

 

[b_b]

its 17 years old. you did good. everything now is lagniappe.

 

[Snagglefoot]

its 17 years old. you did good. everything now is lagniappe.

I had to look up that word. Thanks.
The next thing is to decide if I keep the Burb and go for 300,000 miles plus. I understand a rebuild can be done cheaper if it’s done before the transmission destroys itself with debris.

 

[The motor guy]

I had to look up that word. Thanks.
The next thing is to decide if I keep the Burb and go for 300,000 miles plus. I understand a rebuild can be done cheaper if it’s done before the transmission destroys itself with debris.

Pretty sure the whole thing gets torn down and washed out regardless. Personally, I'd just keep driving it until it because no longer feasible not too. My 68rfe has been slipping for 70,000 miles. Goes into limp mode anytime it detects slipping I believe. I just pull over and restart it, but basically I just keep it under 20 percent throttle until I get into the higher gears.

 

[4WD]

its 17 years old. you did good. everything now is lagniappe.

Graphic portrayal

with lagniappe

 

[The motor guy]

Graphic portrayal

with lagniappe

I wouldn't have any complaints if I made it to 269,000 with no driveability issues. I bet he can still make it to 300k no problem. Keep in mind, that's 269k and not a single clutch was needed like on a manual trans.

 

[4WD]

I wouldn't have any complaints if I made it to 269,000 with no driveability issues. I bet he can still make it to 300k no problem. Keep in mind, that's 269k and not a single clutch was needed like on a manual trans.

No idea why you replied to me with that