| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
11-10-2019, 06:17 PM
|
||||
|
||||
Oil change in safe T track rear end
I’ve never changed the oil in the stock rear end in my gto . It has the safe T Track with 390 gears . What oil do you guys recommend and how is the oil change performed ?
In. my 4 speed tranny I’m using sta lube 85-90 gl4 gear oil |
|
#2
11-10-2019, 08:23 PM
|
||||
|
||||
|
85-90 is good but stay away from synthetics especially for the rear Safe-T Track axle.
Some claim synthetics cause the transmission to be notchy but others have no problem with it. GL4 only for the Muncie. I remember seeing something several years ago that claims GL5 corrodes the Muncie synchros over a period of time. GL4 or 5 for the rear axle plus the GM Posi additive. I just drained the original oil from my non-posi rear axle a few months ago when it was rebuilt but I don't recommend 50 years between changes Depending on how many miles you drive, every 5 years or so should be sufficient. Might even be overkill
__________________
Ed 1968 GTO (Thanks Mom) 2006 Silverado 2007 Cadillac SRX 2015 Chevy Express  2024 Cadillac LYRIQ 
|
|
#3
11-10-2019, 08:40 PM
|
|||
|
|||
|
Quote:
No need to add "more" if what comes with the lube is enough. |
|
#4
11-10-2019, 08:48 PM
|
||||
|
||||
|
So this stuff and a Posi additive?
|
|
#5
11-10-2019, 09:05 PM
|
|||
|
|||
|
What year axle is it? Is it a cone type clutch?
|
|
#6
11-10-2019, 09:13 PM
|
||||
|
||||
|
Quote:
__________________
Ed 1968 GTO (Thanks Mom) 2006 Silverado 2007 Cadillac SRX 2015 Chevy Express 2024 Cadillac LYRIQ
|
|
#7
11-10-2019, 09:16 PM
|
||||
|
||||
|
1967 gto , original rear end
|
|
#8
11-10-2019, 09:26 PM
|
|||
|
|||
|
Sta-Lube multi-purpose Hypoid GL-4 85-90W gear oil. According Ray Motyka a well known 10 bolt re-builder, use 15 oz of STP engine additive mixed into the gear oil and top off the axle with the GL-4 only. The older cone type safe-T-track units do not use clutches and need the cushion of the oil or premature wear will happen.
|
| The Following User Says Thank You to SR-71 For This Useful Post: | ||
|
#9
11-10-2019, 09:37 PM
|
||||
|
||||
|
Awesome thanks
That’s the same oil I’m using in my Muncie 4-speed |
|
#10
11-10-2019, 09:47 PM
|
||||
|
||||
|
Quote:
|
|
#11
11-10-2019, 10:10 PM
|
|||
|
|||
|
Quote:
__________________
1968 Firebird 400 RAII M21, 3.31 12 bolt, Mayfair Maize. 1977 Trans Am W72 400, TH350, 3.23 T Top Everyone you will ever meet knows something you don't. Bill Nye. |
| The Following User Says Thank You to TedRamAirII For This Useful Post: | ||
|
#12
11-10-2019, 10:35 PM
|
||||
|
||||
|
Quote:
|
|
#13
11-11-2019, 12:01 AM
|
|||
|
|||
|
The cones are what was used as clutches in the 8.2 axles back then. Ray has been rebuilding this type of posi for years and knows his stuff. Many of the stock racers that run this type unit depend on his experience to win and keep the rearend living.
|
|
#14
11-11-2019, 08:13 AM
|
||||
|
||||
|
All 8.2" posi rears in Pontiacs where cone type!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
|
#15
11-11-2019, 10:15 AM
|
||||
|
||||
|
Quote:
__________________
Greg Reid Palmetto, Georgia |
|
#16
11-11-2019, 08:11 PM
|
|||
|
|||
|
Quote:
__________________
1968 Firebird 400 RAII M21, 3.31 12 bolt, Mayfair Maize. 1977 Trans Am W72 400, TH350, 3.23 T Top Everyone you will ever meet knows something you don't. Bill Nye. Last edited by TedRamAirII; 11-11-2019 at 08:24 PM. |
|
#17
11-11-2019, 08:20 PM
|
|||
|
|||
|
All the above statements are correct but to summarize: The gallon jug of Sta-Lube GL-4 you pictured would be just fine in your rear axle, no limited slip additive needed because it has a cone clutch. I have never heard of using an engine oil additive in a rear end, so no comment there. GL-5 gear oil is not recommended for cone clutch type limited slip rear ends because it has the limited slip additive already in it. Won't hurt anything really, but renders the limited slip unit less effective.
|
|
#18
11-11-2019, 08:23 PM
|
|||
|
|||
|
Quote:
__________________
1968 Firebird 400 RAII M21, 3.31 12 bolt, Mayfair Maize. 1977 Trans Am W72 400, TH350, 3.23 T Top Everyone you will ever meet knows something you don't. Bill Nye. |
|
#19
11-11-2019, 08:49 PM
|
||||
|
||||
|
Once again thank you guys .
I will use the gl4 sta lube I used in my tranny |
| The Following User Says Thank You to gto19 For This Useful Post: | ||
|
#20
12-11-2021, 02:44 PM
|
||||
|
||||
|
I'm reviving this thread because I finally got my 10 bolt limited slip installed and I'm about to fill it with oil. So to recap, 85 90 weight? Cone type clutch pack?
I already have the limited slip additive, ACDelco type. Do I not need it? Assuming it wouldn't hurt to use it since I have it?
__________________
Greg Reid Palmetto, Georgia |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
