View Poll Results: Gear Oil Weight for Stock 10 Bolt?
75W90
![](https://ls1tech.com/forums/images/polls/bar2-l.gif)
![](https://ls1tech.com/forums/images/polls/bar2.gif)
![](https://ls1tech.com/forums/images/polls/bar2-r.gif)
![](https://ls1tech.com/forums/clear.gif)
81
64.29%
75W140
![](https://ls1tech.com/forums/images/polls/bar3-l.gif)
![](https://ls1tech.com/forums/images/polls/bar3.gif)
![](https://ls1tech.com/forums/images/polls/bar3-r.gif)
![](https://ls1tech.com/forums/clear.gif)
45
35.71%
Voters: 126. You may not vote on this poll
Gear Oil Weight Poll
#4
12 Second Club
Join Date: Sep 2005
Location: Bucks County, Pa.
Posts: 4,273
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Right now I have the Lucas mineral based 85W-140. This stuff is as thick as jelly!!
Before the winter I plan on changing to a Torco RGO mix of 1 qt. of 85W-140 & 1 qt. of 80W-90.
![EEK !!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_eek2.gif)
#6
Kleeborp the Moderator™
iTrader: (11)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Depends on what type of differential you have in there...since I run an Eaton in my Strange 12-bolt, I have to use a non-synthetic gear oil...otherwise, the clutch packs will be hating life and won't work right. If you still have a torsen type of differential, then you are fine using the synthetic, and I think the 140 weight would be a good step in the right direction. I wouldn't expect it to dramatically incrase your rear's life though if you are still on a 10-bolt...
Trending Topics
#14
#15
12 Second Club
Join Date: Sep 2005
Location: Bucks County, Pa.
Posts: 4,273
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
x2 on the Ford XL-3 additive. It's even less $$ than the Delco stuff! (But DAYUM is that some of the most putrid, pungent, persistant stink I've EVER had the displeasure to smell!
)
It gets too cold here in the winter, so I mixed the RGO weights 1/2 80W-90, 1/2 85W-140. It would be cool if Torco or Schaeffers would come out with an "in between" weight in a mineral based gear oil (like Amsoil's synthetic 75W-110). This is what I was trying to accomplish with the mix.
![Icon Eek](https://ls1tech.com/forums/images/smilies2/icon_eek.gif)
![Barf](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_barf.gif)
It gets too cold here in the winter, so I mixed the RGO weights 1/2 80W-90, 1/2 85W-140. It would be cool if Torco or Schaeffers would come out with an "in between" weight in a mineral based gear oil (like Amsoil's synthetic 75W-110). This is what I was trying to accomplish with the mix.
#19
12 Second Club
Join Date: Sep 2005
Location: Bucks County, Pa.
Posts: 4,273
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
You can, but most of those in the know will tell you don't. You MOST CERTAINLY DO NOT "need to" use synthetic gear oil, and like I said most will tell you to use a good, heavy mineral based gear oil in a 9". IF you feel you must use synthetic, make sure you use a heavier weight (75W-140) from Torco, Amsoil, Neo, etc. As far as I know, you do NOT need the friction modifier with the TrueTrac, but I would contact Eaton/Detroit and ask their techs what they suggest (and tell them ALL of your mods/applications/how you plan on using the car, etc.).
#20
11 Second Club
iTrader: (17)
Join Date: Mar 2005
Location: Maryland
Posts: 4,796
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
the thing is i i get a little bit of inner wheel hop on sharp slow turns, like leaving a parting spot, or after i come to a stop sign
if i turn right the right wheel hops a lil bit
if i turn left the left wheel hops a lil bit.
that normal for the truetrack. i was thinking it might have been from the type of fluid
if i turn right the right wheel hops a lil bit
if i turn left the left wheel hops a lil bit.
that normal for the truetrack. i was thinking it might have been from the type of fluid