Question on Changing Diff & Tranny Fluid
Thread Starter
Safety Car
Joined: Sep 2007
Posts: 3,816
Likes: 16
From: Anchorage Alaska
St. Jude Donor '08-'09-'10
Question on Changing Diff & Tranny Fluid
Hi All,
I'm looking to change out both my tranny and diff. fluid later today. I see that I will need a fluid pump to get the new oil into the car.
Now my question is... do I need two pumps, one for each fluid? Or, can one pump be used for both? I am worried about whether the residual fluid from the first change would cause ill effects on the second change.
Would it work to purge the first fluid from the pump by priming it with some of the second fluid? Or should I just quit being a cheapazz and use two pumps?
I'm looking to change out both my tranny and diff. fluid later today. I see that I will need a fluid pump to get the new oil into the car.
Now my question is... do I need two pumps, one for each fluid? Or, can one pump be used for both? I am worried about whether the residual fluid from the first change would cause ill effects on the second change.
Would it work to purge the first fluid from the pump by priming it with some of the second fluid? Or should I just quit being a cheapazz and use two pumps?
Racer
Joined: Mar 2012
Posts: 410
Likes: 0
From: Missouri City Texas
Do your tranny first. Then just pump a tad bit of the diff fluid through your pump first before filling the pumpkin.
However, if you don't, I doubt that little bit of ATF left over in the pump will do any harm to the pumpkin.
However, if you don't, I doubt that little bit of ATF left over in the pump will do any harm to the pumpkin.
Team Owner
Joined: Sep 2000
Posts: 25,025
Likes: 2,716
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Hi All,
I'm looking to change out both my tranny and diff. fluid later today. I see that I will need a fluid pump to get the new oil into the car.
Now my question is... do I need two pumps, one for each fluid? Or, can one pump be used for both? I am worried about whether the residual fluid from the first change would cause ill effects on the second change.
Would it work to purge the first fluid from the pump by priming it with some of the second fluid? Or should I just quit being a cheapazz and use two pumps?
I'm looking to change out both my tranny and diff. fluid later today. I see that I will need a fluid pump to get the new oil into the car.
Now my question is... do I need two pumps, one for each fluid? Or, can one pump be used for both? I am worried about whether the residual fluid from the first change would cause ill effects on the second change.
Would it work to purge the first fluid from the pump by priming it with some of the second fluid? Or should I just quit being a cheapazz and use two pumps?
Be sure to remove or at least loosen the fill plugs before doing the drain plug, occasionally someone gets the old stuff out and can't get the new fluid in.
Thread Starter
Safety Car
Joined: Sep 2007
Posts: 3,816
Likes: 16
From: Anchorage Alaska
St. Jude Donor '08-'09-'10
My other rule is, never put all your new fluid in before checking that the drain plug is installed. I made this discovery after watching my brother fill his engine with six quarts of oil before learning he had left the drain plug out.
And thanks for the responses... Looks like it's not a major deal either way.
Racer
Joined: Mar 2013
Posts: 276
Likes: 1
From: Cleveland Heights Ohio
Looks like you may already have done the job, but as stated; if it's just one pump then do the trans first and I doubt if a couple of teaspoons of trans fluid (probably the same weight or at least close...) would ever affect the diff.
My 2 cents.
edit- In fact, come to think of it, my WRX uses the same Amsoil fluid for both applications... I know Corvettes don't but it's still very similar.
My 2 cents.
edit- In fact, come to think of it, my WRX uses the same Amsoil fluid for both applications... I know Corvettes don't but it's still very similar.
Last edited by richietables; May 23, 2013 at 12:44 PM.
