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go-west..
go-west.., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1152
Experience:  Technican with 20 years experience focused on engines and electrical.
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I have a 2016 PETE 389 with Cummins engine and a 18spd

Customer Question

Hello I have a 2016 PETE 389 with Cummins engine and a 18spd tranny was rebuilt by me last year I eliminated the cooling system on it because the was the problem it had it was leaking the oil through there trany has been running at 260 temp with no oil cooler for it I used 50W synthetic . Now driver said it feel likes it act up when the trany is warm from 4-5 gear the it takes a few to catch I test drove it and seems fine but I couldnt get temp to go past 150 to see if I hear any noise on trany all gears feel and go in smooth
Submitted: 3 months ago.
Category: Medium and Heavy Trucks
Expert:  go-west.. replied 3 months ago.
Good evening
Did you check the plugs for metal especially the bottom one? If its OK then I would say leave it, let me know how you do.
Customer: replied 3 months ago.
Nope was going to do that but I forgot I will do it in the Am
Customer: replied 3 months ago.
You don't think I should add a old style cooler ?
Expert:  go-west.. replied 3 months ago.
Might be a good idea
add the cooler again, they
Help,
Customer: replied 3 months ago.
Does it affect from using 50W synthetic to regular 50W
Expert:  go-west.. replied 3 months ago.
No
Synthetic cost more
Customer: replied 3 months ago.
But it was running synthetic what is the difference
Expert:  go-west.. replied 3 months ago.
Synthetic oil will last a few more miles. Compared to regular oils. Some customers prefer regular oils because of cost.
Expert:  go-west.. replied 3 months ago.
Synthetic oil will last 500,000 km
Non synthetic will last 350,000
Customer: replied 3 months ago.
Why is it that the driver is saying once the oil temp heats up its start to act up ?
Expert:  go-west.. replied 3 months ago.
I think you have cooler back on, it might fix it. did you check the plugs of metal?
Customer: replied 3 months ago.
If I install a cooler for the TRANS how hot will the temp run at ?
Expert:  go-west.. replied 3 months ago.
200 f
Plus or minus 25
Expert:  go-west.. replied 3 months ago.
If its hotter outside
Possibly higher.
Customer: replied 3 months ago.
How about with out cooler what is normal temp
Expert:  go-west.. replied 3 months ago.
Up to 265 f
How hot outside is you are?

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