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That will be the Oil pump drive. Take the hold down clamp off(1 bolt) and pull the the drive out. There's a paper gasket under it but i have replaced it with a proper fitting 0 ring.

1/2 a tank first trip.no T/H 3/4 tank sec trip with T/H only one way when loaded 450 km round trips. Tank was full till the cap, i gravity fill from my bulk tank so no foam.

Fram element is sealed with a steel press formed seat in the bottom and a rubber cup in the top. No drain back prevention valve found Hastings element is sealed with a hard plastic spacer and spring in the bottom against the bypass valve, the spring loaded valve fits inside the element. At...

I took another load down to the butcher last thursday. I pushed the tow/haul button,light came on and stayed on,..been working ever since. Sure affectted the mileage though, i used a 1/4 tank more than with the first load,..pretty near same weight at 19000 + lbs

Ya ya, blame it on da machine :poke:

Jim i took your advice and cut one open. I did not have an AC delco but i had a used hasting from the D max so i cut that one open as well for comparison The filter media and steel insert on both was identical but the Hasting had a spring loaded bypass valve in the cartridge and is a little...

Mike I have 4 spare hasting oil filters for the D-max ,they came with the truck. I should be good for a couple years ;) But what is wrong with fram :???:,..been using them forever and never ever had a problem with them.

Fram,..don't know about the drain back thingy. The filter is always full of oil come changing time

Did you read the first post ?,...got a mechanical gauge as well.;)

All good.:thumbsup: i kicked a tire and fired it up again,.. right away oil pressure.:agreed: stupid old cow was just lazy :rolleyes5:

Nope,...trough the grape vine.

The ultimate insult,..a ferd towed by a chevy :hihi:

Sounds like a plan. Thanks Therm,. you da man with a great idea.

Tata,..sold this thing today, payed $3500,..sold it for 7 grand!... 100% profit!:D,..payed nearly for the D-max. :hihi: Still got the other genset:agreed:

OK..ok,...mebbe i shoulda said when i feel like it :D No way in hell i gonna drop the pan on this old cow :nonod:

No kidding

The oil and filter was changed shortly before i parked for the winter. I can't see the pump not being able to prime cause the oil level is right up to the gears and i have have this truck sit every winter for the last 6 or so years,..never had a problem before. I guess as soon as i have some...

I fired up my old 89 today after sitting since nov last year. Check oil and coolant,..all good. Turned the key to turn her over without using the glows to get some oil flowing to the bearings and fully expecting "click..click" cause of dead batts but instead she fired up right away and purred...

The speed sensors should test the same ohms within an ohm or 2,..i believe around 23.

I would venture to say that the pressure plate diaphragm was uneven from day one and the cause of the trouble,.. might have been a dud diaphragm.ie:uneven hardening or bad metal from the factory. It would've caused uneven loading of the clutch plate which explaines the uneven wear of the plate...