Transaxle Fluid Change
Thread Starter
Instructor
Joined: Mar 2008
Posts: 191
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From: Austin
Transaxle Fluid Change
I've had my '81 for a few months now, and it's been great so far.
I'm fixing little things, and freshening it up as I go.
This weekend was the transaxle fluid (it took me a couple of places to find a 17mm hex!). When the old fluid was draining, I swear it looked and smelled like transmission fluid instead of gear oil. Is their some type of gear oil or brand that resembles transmission fluid, or did the previous owner screw up? I've been driving regularly it for 3 months, and have had no issues.
I replaced it with 90wt gear oil, and I'll hope for the best.
Thanks,
Chris
I'm fixing little things, and freshening it up as I go.
This weekend was the transaxle fluid (it took me a couple of places to find a 17mm hex!). When the old fluid was draining, I swear it looked and smelled like transmission fluid instead of gear oil. Is their some type of gear oil or brand that resembles transmission fluid, or did the previous owner screw up? I've been driving regularly it for 3 months, and have had no issues.
I replaced it with 90wt gear oil, and I'll hope for the best.
Thanks,
Chris
Thread Starter
Instructor
Joined: Mar 2008
Posts: 191
Likes: 3
From: Austin
Malcom,
A few weeks back I changed the auto trans fluid, and replaced the pan gasket.
Today I did the rear axle with the two big 17mm drain plugs. in the very back. The owners manual seemed to indicate 90 wt gear oil.
Thanks,
Chris
A few weeks back I changed the auto trans fluid, and replaced the pan gasket.
Today I did the rear axle with the two big 17mm drain plugs. in the very back. The owners manual seemed to indicate 90 wt gear oil.
Thanks,
Chris
Burning Brakes
Joined: May 2001
Posts: 1,124
Likes: 11
Chris,
The SAE rating of the oil is 90 gear oil, however, I replaced mine with Synthetic Oil which was very nearly colourless.
As previously asked, is your car an auto or a 5 speed?
When asking questions if is very helpful if you give MY and whether an auto or manual box initially, to allow us the give meaningful suggestions or answers.
Tails 1990 928S4 Auto.
Tails
The SAE rating of the oil is 90 gear oil, however, I replaced mine with Synthetic Oil which was very nearly colourless.
As previously asked, is your car an auto or a 5 speed?
When asking questions if is very helpful if you give MY and whether an auto or manual box initially, to allow us the give meaningful suggestions or answers.
Tails 1990 928S4 Auto.
Tails
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Joined: Nov 2003
Posts: 2,608
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From: Sydney AUS
Chris,
The SAE rating of the oil is 90 gear oil, however, I replaced mine with Synthetic Oil which was very nearly colourless.
As previously asked, is your car an auto or a 5 speed?
When asking questions if is very helpful if you give MY and whether an auto or manual box initially, to allow us the give meaningful suggestions or answers.
Tails 1990 928S4 Auto.
Tails
The SAE rating of the oil is 90 gear oil, however, I replaced mine with Synthetic Oil which was very nearly colourless.
As previously asked, is your car an auto or a 5 speed?
When asking questions if is very helpful if you give MY and whether an auto or manual box initially, to allow us the give meaningful suggestions or answers.
Tails 1990 928S4 Auto.
Tails
I agree
However I guess and hope from this
A few weeks back I changed the auto trans fluid, and replaced the pan gasket.
Today I did the rear axle with the two big 17mm drain plugs. in the very back. The owners manual seemed to indicate 90 wt gear oil.
Today I did the rear axle with the two big 17mm drain plugs. in the very back. The owners manual seemed to indicate 90 wt gear oil.
Chris
SAE 90 and must be GL5, gear oil is correct for the AT differential . Only the 5sp needs a 75W90 and GL5 lubricant as the lube does both the tranny and the diff all in one. (Changing gear in a 5sp with SAE90 is impossible with a cold or even warm tranny)
Thread Starter
Instructor
Joined: Mar 2008
Posts: 191
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From: Austin
It is an auto, and, as stated, I've changed that fluid. My apologies for not being clearer in the first note.
I'm thinking the previous owner filled the rear axle with automatic transmission fluid instead of gear oil.
Thanks,
Chris
I'm thinking the previous owner filled the rear axle with automatic transmission fluid instead of gear oil.
Thanks,
Chris
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Joined: Oct 2004
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From: Southern Alberta, Canada
Chris...........the differential is 90w oil; I used synthetic when I changed my cars.
Another tip; ensure you can remove the fill plug before draining otherewise you'll be unable to refill.
Another tip; ensure you can remove the fill plug before draining otherewise you'll be unable to refill.
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Thread Starter
Instructor
Joined: Mar 2008
Posts: 191
Likes: 3
From: Austin
Malcolm,
You're not kidding . . . it took a 17mm hex key, and a 3 foot pipe as an extender!
How much harm do you suppose was done with the PO filling the rear axle with auto trans fluid? It appears all is well with the 90 wt in.
Thanks,
Chris
You're not kidding . . . it took a 17mm hex key, and a 3 foot pipe as an extender!
How much harm do you suppose was done with the PO filling the rear axle with auto trans fluid? It appears all is well with the 90 wt in.
Thanks,
Chris
