Eaton Gear Oil Recommendations for the Truetrac

[Racer47]

Originally Posted by JCSheeron
When researching fluid to use with the Eaton Truetrac ........ I ordered Shell 5921212091 Spirax HD Gear Oil 85W-140 for use in my truck from Jet.com, and noticed that it is also available from TrueValue.com.


I know this thread is 2 yrs old but its still valid. And Shell 5921212091 Spirax HD Gear Oil 85W-140 is still available. I ordered online from Pep Boys. It even lists this exact manufacturer part number. Todays price is $2.72 a quart and $7 to ship 4 qts.

https://www.pepboys.com/shell-85w-140-spirax-heavy-duty-gear-oil-quart/product/1103577

Thanks bitog. I don't post much here but every time I need oil advice or info, I can find it here. Thanks guys.

 

[RexPal]

Good thread indeed - I'm curious if anyone has tried the Redline 75w140NS?

https://www.redlineoil.com/75w140-ns-gl-5-gear-oil

Sounds like a good answer, and they say you can add some LS additive if it's too grabby... anyone done this?

 

[T-Stick]

I don't think you will find a -35C fluid that is not 75w90 and all the 75w90 that I am aware of are either syn or have LS additive in them. If cold weather performance is an absolute criteria I would pick a syn 75w90 without LS. I think LS would be more detrimental than a syn. I would go with the non LS 75w90 Delvac. It meets all heavy industry specs and has a long life formulation and is available on Amazon.

 

[T-Stick]

I forgot about Subaru 75w90 made by Idemitsu. This just might be your ticket and should meet all the requirements.

https://www.amazon.com/Subaru-75W90...;qid=1558010535&s=gateway&sr=8-4

Appears to be about 25% synthetic. This is probably essential to get the 75w rating. I'm still thinking this is probably the closest spec to your requirements:

https://content.subarunet.com/snet/...ru_chemicals/sheets/soa427v1700_msds.pdf

or Eanos

https://www.eneos.us/wp-content/uploads/2018/10/ENEOS-Gear-Oil-75W90_PDS_10-22-16.pdf

if you want to spend more money

https://www.amazon.com/Eneos-309230...011737&s=gateway&sr=8-3-fkmrnull

 

[ABursell]

Since this thread has come back, I'll update my status.

Originally the shop that did the install used conventional fluid and added FM. I had asked not to, but saw it on the invoice- maybe just habit. The TT worked nice so I didn't really think much of it but it always made me wonder. Eventually, I got around to swapping the fluid for Amsoil Severe Gear 75/90 and there is a noticable difference- it grabs much better. I mean both tires will get power longer in a slip situation. I wouldn't have thought it would be big enough to feel but it is. Despite the Amsoil being LS ready, it works great for me with the TT. Based on my experience, I would say at least Amsoil is ok, but not sure about other LS ready synthetics.

 

[4WD]

I get Delvac 1 gear oil from Summit Racing, best price but normally takes $100 to get free shipping so I pick up other items too … think they carry it for the Porche track crowd … very versatile fluid when you consider it's a 500k OTR truck gear oil … I have had it in three LT's so far …