Mobile delvac 50 wt.

[mfurrh55]

I was in Utah all last week,and while i was there i decided to change out my trans. fluid, i put a gallon of the Mobile Delvac 50 wt. and 3 qrts. of Amsoil 30 wt. synchromesh synthetic, the temp. up there every morning ranged 16 deg to 22 deg. Transmission shifted fine in them temps. no noise and it shifted better than it has ever shifted , Really smooth, got back to Tx. and it's still doing great, when i changed out the dextron transmission fluid i did have a little bit of metal on the magnetic plug, not much though, I have 129,000 miles on my truck and 128,000 with the Dextron in it and pulling pretty heavy loads.

 

[Wayne M.]

Delvac 50- straight weight? Didn't know such a beast existed...

 

[CKelley1]

wayne it is a special sae 50 synthetic transmission fluid for the roadranger transmissions, here is a list of three other equals and a royal purple equal to the amsoil 10 wt he used. depending on where you live determines the blend ratio you need to use. most south states can use the straight 50 wt, Canada a 50-50 blend. I am starting to use a 66.6% 50 wt. go one to two quarts over full.
Delo Synthetic Transmission Fluid SAE 50 delivers exceptional all-climate, year-round performance in heavy duty truck transmissions. A unique additive package can protect gears without using the “active sulfur” agents commonly found in automotive axle oils. This results in little to no corrosion and long life for copper-containing parts, such as oil coolers, bushings, and thrust washers. Good pumpability in extreme hot or cold temperatures promotes smooth shifting and efficient power transfer. It is specifically formulated to meet the latest extended drain requirements for Eaton transmissions, with drain intervals of up to 500,000 miles.
Synchromax is recommended for manual transmissions
that specify an automatic transmission fluid or motor oil.
It is also ideal for transfer cases and 2-cycle motorcycle
gear boxes.
Synchromax is formulated with Royal Purple’s synthetic,
proprietary Synerlec additive technology, offering
improved shift quality over a wide temperature range and
reduced gear noise.
Synchromax is fully compatible with all types of friction
materials and offers excellent corrosion and oxidation
protection without affecting the soft metals commonly
found in manual transmission synchronizers.
Performance Advantages
• Greater wear protection
• Smoother shifts
• Excellent rust / corrosion protection
• Reduces friction for more power
• Lowers operating temperatures






Castrol 50 wt is syngear CD50 o’rileys p/n syn 50-5
Amsoil FT F05-EA

 

[Wayne M.]

Syncromax is different yet? I never thought of mixing oils. The G and the NV 5600 have different requirements correct? I need to do mine soon.

 

[DClark]

Recommended TC fluid if different then ATF

wayne it is a special sae 50 synthetic transmission fluid for the roadranger transmissions, here is a list of three other equals and a royal purple equal to the amsoil 10 wt he used. depending on where you live determines the blend ratio you need to use. most south states can use the straight 50 wt, Canada a 50-50 blend. I am starting to use a 66.6% 50 wt. go one to two quarts over full.
Delo Synthetic Transmission Fluid SAE 50 delivers exceptional all-climate, year-round performance in heavy duty truck transmissions. A unique additive package can protect gears without using the “active sulfur” agents commonly found in automotive axle oils. This results in little to no corrosion and long life for copper-containing parts, such as oil coolers, bushings, and thrust washers. Good pumpability in extreme hot or cold temperatures promotes smooth shifting and efficient power transfer. It is specifically formulated to meet the latest extended drain requirements for Eaton transmissions, with drain intervals of up to 500,000 miles.
Synchromax is recommended for manual transmissions
that specify an automatic transmission fluid or motor oil.
It is also ideal for transfer cases and 2-cycle motorcycle
gear boxes.
Synchromax is formulated with Royal Purple’s synthetic,
proprietary Synerlec additive technology, offering
improved shift quality over a wide temperature range and
reduced gear noise.
Synchromax is fully compatible with all types of friction
materials and offers excellent corrosion and oxidation
protection without affecting the soft metals commonly
found in manual transmission synchronizers.
Performance Advantages
• Greater wear protection
• Smoother shifts
• Excellent rust / corrosion protection
• Reduces friction for more power
• Lowers operating temperatures






Castrol 50 wt is syngear CD50 o’rileys p/n syn 50-5
Amsoil FT F05-EA

CKelly1
What fkuid do you recommend for the TC if different then the factory spec?
DClark

 

[LHirshman]

CKelly1
What fkuid do you recommend for the TC if different then the factory spec?
DClark

Last year I replaced the stock clutch and flywheel with a SBC unit. Time wise this occurred when the article about G56 oil appeared in the TDR. Autowerks Diesel in NJ did the job. I supplied them with the Mobil Delvac 50WT for the G56. They test drove the truck with the stock ATF after the clutch replacement and then changed to the Delvac. I was told it made a significant difference in the transmission noise. I have run the Delvac for a year now including the single digit temperatures we had this past winter. Other than letting the engine idle in 3rd gear with the X-fer case in neutral for a few minutes, there is not much change in transmission performance at the various temperature extremes. It shifts smoothly and precisely.

I'm very happy with the SBC clutch and the Mobil Delvac.

 

[CKelley1]

we had a tc failure due to lack of oil, never seen a leak or could figure out where it went but when i tore it down it was very obvious that the sae 50 was going to be the better oil. we changed all of them over from the atf.

 

[Regcabguy]

we had a tc failure due to lack of oil, never seen a leak or could figure out where it went but when i tore it down it was very obvious that the sae 50 was going to be the better oil. we changed all of them over from the atf.

How many miles on the 50 wt in the tc's Carl?

 

[CKelley1]

i am going to guess the one with the most is about 75,000

 

[amsoilman]

Mixing different gear lubes/oils is never a good thing! Different BASE STOCKS and ADDITIVES in oil companies formulations, can cause problems down the road. Every class I have been in regarding oils and lubricants warns of the consequences that can occur when doing that. Mixing a grade 30 oil with a grade 40 oil will not make a different grade.
Having said that, each person can decide what they want to do, but remember, there are consequences. Just saying!

 

[CKelley1]

wayne i know that but the oils that i mentioned use the same additive package and same base stock. i had blackstone and cat run the test's. we have temp probes on them and can visually see a difference in some oils. we have now rebuilt three g56's and document the part failures and inspect the wear. of the failures i was driving two of the trucks when they failed. one i was coming out of a canyon in Pennsylvania and was at about 900 ft lbs torque when i hit a sunken in ditch across the interstate, it broke a tooth off 6th gear. there was no measurable wear or coloration so the oil is doing it's job. by the way i completed the trip without 6th gear, 2,500 more miles. if i know of a g56 being torn down i try to go look at it. a shop near me will let me take pix and measure parts, the pix of the bearing race is from a g56 with atf, not my truck don't have a lot of info but look at how hot it has been. the gear is my 6th gear
#ad

#ad

#ad

 

[Regcabguy]

wayne i know that but the oils that i mentioned use the same additive package and same base stock. i had blackstone and cat run the test's. we have temp probes on them and can visually see a difference in some oils. we have now rebuilt three g56's and document the part failures and inspect the wear. of the failures i was driving two of the trucks when they failed. one i was coming out of a canyon in Pennsylvania and was at about 900 ft lbs torque when i hit a sunken in ditch across the interstate, it broke a tooth off 6th gear. there was no measurable wear or coloration so the oil is doing it's job. by the way i completed the trip without 6th gear, 2,500 more miles. if i know of a g56 being torn down i try to go look at it. a shop near me will let me take pix and measure parts, the pix of the bearing race is from a g56 with atf, not my truck don't have a lot of info but look at how hot it has been. the gear is my 6th gear
#ad

#ad

#ad

Carl,
Have you considered Amsoil's Manual Trans & Transaxle Gear Oil 75-90?

 

[amsoilman]

Yes, it is hammered! Good that you could make the rest of the trip. What Brand of oil was in this transmission?

 

[CKelley1]

it was a 50-50 blend of chevron sae50wt synthetic transmission fluid and amsoil mtf fluid. we have one truck with the 75w-90 gear oil in it, i haven't driven it enough to know how it shifts in the winter. the delvac. chevron, castrol and amsoil 50wt have near identical boron, phosphorus, zink packages, these three ingredients will determine the wear. the 50- 50 blend shifts best at my temp's in the winter, i tested a blend with blackstone and it was at 11.5 cst @100* viscosity. don't want to hijack this thread but we did test on several other fluids before deciding to try them. one stood out as a g56 killer, it will ruin one quickly, it is gorilla juice. it had 2 units of zinc compared to 1600 for the above and half the phosphorus and is so thick i do not see how it could shift even in the summer, it came in at 30cst @100*c, the g56 has needle bearings in a nylon cage this crap is not going to lube or cool it.