Transmission Fluid
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Transmission Fluid - 3/12/2008 2:10:03 PM
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hammer3478
Posts: 5
Joined: 9/16/2007
Status: offline
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1998 4x4 blazer 98,000 miles
I have about a quart and half too much of transmission fluid that I dumped in. My question is should I syphon that out from the dipstick or should I drop the pan, change filter and put new fluid in?
I have heard that with high mileage it's best not to change the old fluid but a tranny guy told me that you can do that now that they have the Mercon V.
Please let me know what you guys think.
I have not changed this filter since I had it when there were 35,000 miles on the vehicle.
Thanks Guys
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RE: Transmission Fluid - 3/12/2008 3:00:10 PM
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Chevy Lover
General Tech Moderator
Posts: 3411
Joined: 6/11/2006
From: Vancouver. B.C. Canada
Status: offline
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The correct trans fluid is DEXRON®-III Automatic Transmission Fluid .
If it's overfilled, you can disconnect the fluid line to the cooler in the radiator (over a bucket) and drain some out. You may have to start the engine momentarily. Then you can clean up the oil with a brake parts cleaner spray. This would be easier, in my opinion than dropping the pan.
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Give a man a fish and he will eat for a day, teach a man to fish, and he will sit on a boat drinking beer for a life time
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RE: Transmission Fluid - 3/12/2008 4:20:29 PM
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WolfPack
Posts: 3074
Joined: 10/30/2007
From: Raleigh, NC
Status: online
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What exactly are the negatives of overfilling the tranny? I know of all the fluids that's one you wanna avoid over filling..but isn't there some sort of overflow valving or something to eliminate the buildup in pressure?
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2000 Blazer 4d LS 4x4 - 265/70/15 General Grabber AT2s - Hunter Brush Guard - Surco Roof Rack with IPF 868s - 1.5'' Shackle + Tbar - 2'' BL
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RE: Transmission Fluid - 3/12/2008 5:52:17 PM
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swartlkk
Posts: 15304
Joined: 5/1/2005
From: Waterloo, NY
Status: offline
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A slight amount of extra fluid isn't going to matter. But get up to the 1/2qt to 1qt over and you will start to get fluid up into the moving parts which will aerate the fluid causing it to foam and puke out the breather. Not to mention that foamed ATV doesn't protect anything in the transmission lubrication wise.
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Kyle-
My Restoration Projects
Please Do Not PM for Tech Help
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RE: Transmission Fluid - 3/12/2008 9:11:26 PM
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Hanr3
Wheels & Tire Moderator
Posts: 3523
Joined: 5/11/2005
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Yep, its got a breather hose on top of the tranny right behind the bellhousing. If its overfull it'll puke out when it gets hot. Its worse to run it while low on fluid.
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"Some people spend an entire lifetime wondering if they made a difference.
The Marines don't have that problem."
-President Ronald Reagan
'87 S10-Blazer - SOLD
'93 S10-Blazer 4x4x4 - Sons DD, engine swap is done.
'00 S10-Blazer 4x4x4 - My
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RE: Transmission Fluid - 3/12/2008 10:53:11 PM
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Blazin_Jason
Posts: 1101
Joined: 5/17/2006
From: Van Isl, B.C.
Status: offline
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Easy way I've done it is to use a vaccuum pump with some hose (windshield washer hose works perfect), down the dipstick tube and pump out the extra.
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85 S10 Blazer 4x4, 2 door, undergoing 350 swap, 3" BL, 33''''s
89 Jimmy 4x4, 2 door, 4.3/auto
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