Community Forums

Sukutto · 08-27-2022, 02:41 PM

Did some searching but came up empty. Any help is greatly appreciated.
On our way home from our last trip Trans Oil Filter notification displayed on the dash (2020 Newmar Ventana 13000 mi). I proceeded home (2hrs/110 miles)
Ordered OEM Allison filters and installed.
Through Trans Prognostics did reset procedure N-R-N-R-N-D-N.
System shows Oil filter status - OK.
Started, checked fluid level on dipstick and through Trans Prognostics.
Shut down and restarted.
Filter Status shows - Replace
Each time key is cycled (key on engine off)Does not have to be running
Oil Filter status shows - Replace.
Using a handheld Autel 529 HD Code Reader/Scanner
DTC SPN335 Trans oil filter restriction switch is stored. DTC will not clear/reset.
Freightliner Dash/Display Diagnostics - Trans filter maint alert DTC P088A

jacwjames · 08-28-2022, 01:54 PM

I'd recommend sending in a oil sample for analysis. I buy 3 kits at a time from JG Lubrication. I've use a big syringe to pull a sample, the send a piece of tubing. Pull a sample, fill out the info, put the sticker on the bottle, send it in. Go to the JG site and use the number on the card to get results, they'll email the results. Last time I sent a sample in it took 4 days to get results.

Cat320 · 08-29-2022, 07:05 AM

Quote:

Originally Posted by jacwjames

I'd recommend sending in a oil sample for analysis. I buy 3 kits at a time from JG Lubrication. I've use a big syringe to pull a sample, the send a piece of tubing. Pull a sample, fill out the info, put the sticker on the bottle, send it in. Go to the JG site and use the number on the card to get results, they'll email the results. Last time I sent a sample in it took 4 days to get results.

Same here. They will send you a long enough tube to take a sample from down the dip stick hole....and you will need one of their pumps.

jacwjames · 08-29-2022, 07:19 AM

Quote:

Originally Posted by Cat320

Same here. They will send you a long enough tube to take a sample from down the dip stick hole....and you will need one of their pumps.

I use a large syringe and it works great.

I just used it to evacuate all the power steering fluid out of my Jeep before installing a new pump and flushing the system, didn't get it all but probably +80%!

Sukutto · 08-29-2022, 10:17 PM

Thanks to all for the responses.
After a little time away I was able to get back at it and get it figured out.

Trans filter maint. alert DTC P088A is set as a Trans Fault within the Freightliner Dash/Display Diagnostics but is only set when the Allison TCM sees DTC SPN335 Trans oil filter restriction switch.

When scanning a second time I performed an Erase DTC and Freeze Frame data from the Instrument Gauge Module even though no DTC's were present in module. This cleared the Trans Fault within the Freightliner Dash/Display Diagnostics which allowed me to reset (Trans Oil Filter - Okay)

Sukutto · 08-29-2022, 10:19 PM

Quote:

Originally Posted by jacwjames

I'd recommend sending in a oil sample for analysis. I buy 3 kits at a time from JG Lubrication. I've use a big syringe to pull a sample, the send a piece of tubing. Pull a sample, fill out the info, put the sticker on the bottle, send it in. Go to the JG site and use the number on the card to get results, they'll email the results. Last time I sent a sample in it took 4 days to get results.

Will be ordering tomorrow... Better to know than not!!!