Too Much Tranny Fluid? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

LBJ · 01-04-2008, 12:17 PM

I checked my transmission fluid after having it serviced today and it was about 1.5 inches OVER the FULL HOT marking!!! Is that going to cause me to blow some seals? LBJ

swb85 · 01-04-2008, 12:24 PM

If it is actually overfilled that much, definitely drain some. The fluid will start to aerate and lose it's lubricating ability. Just in case you aren't, you should be checking the fluid level while the truck is running and all the fluids are up to temperature.

spudz · 01-04-2008, 01:01 PM

It'll blow out what it doesn't need.

**old Rusty C10** · 01-04-2008, 02:12 PM

the thing is tho did you check the trans fluid hot and at idle and level ground? if not check it that way and see what you have

Restrorob · 01-04-2008, 03:44 PM

JMO,

If you still find it over full after the above mentioned I wouldn't recommend touching it. I would take it back to where you had it serviced and ream the manager then make them do it. If you have no drain plug the pan will have to be dropped to drain some out (not too many have those fancy oil suckers) so a new pan gasket will be needed to prevent leaks.

LBJ · 01-04-2008, 03:54 PM

Yeah, I checked it HOT and LEVEL. They just out too much in. I can pull the speedo connection and it will POUR out. The guy also dripped the fluid ALL over the inside of my fairly clean engine compartment, including the absolutely freshly painted inner fender wells. Really sloppy.

**old Rusty C10** · 01-04-2008, 03:57 PM

better make them do it and id complain to the shop manager tranny fluid can mess up the paint not to mention dirt will stick to it id make em clean it all off i mean i dont mind paying for a job but at least try to do it right

Restrorob · 01-04-2008, 04:06 PM

Quote:

Originally Posted by LBJ

The guy also dripped the fluid ALL over the inside of my fairly clean engine compartment, including the absolutely freshly painted inner fender wells. Really sloppy.

That's why NO ONE gets under the hood or behind the wheel of ANY of my vehicles. If it's gonna be f-ed up I'm the one gonna do it.

Thumpin455 · 01-05-2008, 08:07 AM

Unless you dont ever want them under your truck again, take it back. If you can drain some off via the speedo or governor ports then do it yourself. If someone does shoddy work, unless its a major item, why go back to them?

Leaving it in there is not a good option, if the reaction carriers and drums are submerged in fluid, they will whip it into a foam much like whipped cream but nowhere near as tasty. Air does not lubricate, and the lines and passages will be filled with foam instead of oil. Not enough oil in the clutch packs and they will slip due to low line pressure and no lubrication in the pack itself. You then get dry clutches and burned clutch packs, that requires a rebuild.

moneyeater · 01-05-2008, 12:30 PM

I´d take it back and have them cleaning it up and drain some fluid and then try to get something back in form of money or a can of oil!

Is the speedocableport supposed to leak trannyoil when the truck is not driven for a few weeks? Or is there a gasket or something that is not ok when it leaks?

Restrorob · 01-05-2008, 03:02 PM

Quote:

Originally Posted by moneyeater

Is the speedocableport supposed to leak trannyoil when the truck is not driven for a few weeks? Or is there a gasket or something that is not ok when it leaks?

No tranny is supposed to leak, Most have a O-ring around the speedo drive head.

LBJ · 01-07-2008, 01:59 PM

I fixed the high fluid level. First I pulled the speedo cable connection. That only dumped about a few ounces. Then I had the bight idea to open to trans cooler line at the radiator. I took a 50/50 guess on the TOP line being the supply line. Wrong! Dumped about 2 quarts of fluid on the drive and all over the right side of the engine compartment. But, after I cleaned that up, the only thing to do was to add about 1.5 quarts and the level is now perfect. Didn't have to screw with dropping the pan or make another trip to the tranny guy. I changed the oil and fliter, checked everything again and took it out on the freeway for a short spin. It drove and perfromed just about right for a 30 year old truck with original engine and rebuilt tranny. Good smooth ride, brakes perfect, no problems at all. Fun.

LBJ · 01-11-2008, 01:12 PM

I talked to the guy who repaired my tranny today. That's his TOTAL business for the last 30 years. Good guy. He said that he would rather have the level a bit high than a bit low or right on the mark. He said that "blowing the seals out" was probably from the 40's or 50's era cars that had leather seals. Everything from the mid 60's forward have been very good and better. He also said that there is a vent that will dump any overages and it has to be PRETTY HIGH to even get to that vent. That's what one of the guys here said to begin with. Spudz, I think it was.

So, guess it wasn't too bad after all. I would have liked it if his helper hadn't dumped it all over the engine compartment when filling it.

LBJ

01-04-2008, 12:17 PM	#1
LBJ Registered User Join Date: Jun 2007 Location: TEXAS Posts: 378	Too Much Tranny Fluid? I checked my transmission fluid after having it serviced today and it was about 1.5 inches OVER the FULL HOT marking!!! Is that going to cause me to blow some seals? LBJ

01-04-2008, 12:24 PM	#2
swb85 On a budget like Fred Sanford Join Date: Oct 2005 Location: Topeka, KS Posts: 2,031	Re: Too Much Tranny Fluid? If it is actually overfilled that much, definitely drain some. The fluid will start to aerate and lose it's lubricating ability. Just in case you aren't, you should be checking the fluid level while the truck is running and all the fluids are up to temperature. __________________ '85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD Last edited by swb85; 01-04-2008 at 12:25 PM.

01-04-2008, 01:01 PM	#3
spudz Registered User Join Date: Oct 2005 Location: Branchville SC Posts: 1,647	Re: Too Much Tranny Fluid? It'll blow out what it doesn't need. __________________ 2004 z71, 96 z71 on 38s, 88 Chevy k5 blazer, 4in lift. 84 swb project, 82 SWB project , 84 chevy 4x4 lwb project, 88 Jimmy beater/highschool ride. 79 c30. 99 tahoe 4x4 project. and a bunch of parts trucks..

01-04-2008, 02:12 PM	#4
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,287	Re: Too Much Tranny Fluid? the thing is tho did you check the trans fluid hot and at idle and level ground? if not check it that way and see what you have __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

01-04-2008, 03:44 PM	#5
Restrorob The One And Only !!! Join Date: Jan 2007 Location: Hole in the woods Florida Posts: 4,567	Re: Too Much Tranny Fluid? JMO, If you still find it over full after the above mentioned I wouldn't recommend touching it. I would take it back to where you had it serviced and ream the manager then make them do it. If you have no drain plug the pan will have to be dropped to drain some out (not too many have those fancy oil suckers) so a new pan gasket will be needed to prevent leaks. __________________ 93 Jeep XJ 88 Buick La Sabra Toys; 88 TA-GTA in the works.... 97 GMC Ext. Cab 502 Crate 5 Spd......Sucks Gas But Haulz Azz ! The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic. *"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!* Last edited by Restrorob; 01-04-2008 at 03:45 PM.

01-04-2008, 03:54 PM	#6
LBJ Registered User Join Date: Jun 2007 Location: TEXAS Posts: 378	Re: Too Much Tranny Fluid? Yeah, I checked it HOT and LEVEL. They just out too much in. I can pull the speedo connection and it will POUR out. The guy also dripped the fluid ALL over the inside of my fairly clean engine compartment, including the absolutely freshly painted inner fender wells. Really sloppy.

01-04-2008, 03:57 PM	#7
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,287	Re: Too Much Tranny Fluid? better make them do it and id complain to the shop manager tranny fluid can mess up the paint not to mention dirt will stick to it id make em clean it all off i mean i dont mind paying for a job but at least try to do it right __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

01-05-2008, 08:07 AM	#9
Thumpin455 My truck is an alcoholic Join Date: Nov 2007 Location: Marquette Mi Posts: 303	Re: Too Much Tranny Fluid? Unless you dont ever want them under your truck again, take it back. If you can drain some off via the speedo or governor ports then do it yourself. If someone does shoddy work, unless its a major item, why go back to them? Leaving it in there is not a good option, if the reaction carriers and drums are submerged in fluid, they will whip it into a foam much like whipped cream but nowhere near as tasty. Air does not lubricate, and the lines and passages will be filled with foam instead of oil. Not enough oil in the clutch packs and they will slip due to low line pressure and no lubrication in the pack itself. You then get dry clutches and burned clutch packs, that requires a rebuild. __________________ Too much stuff, too many projects to list everything. my 454 urged 76 swb beater

01-05-2008, 12:30 PM	#10
moneyeater Registered User Join Date: Feb 2003 Location: Northern Germany,near Bremen Posts: 684	Re: Too Much Tranny Fluid? I´d take it back and have them cleaning it up and drain some fluid and then try to get something back in form of money or a can of oil! Is the speedocableport supposed to leak trannyoil when the truck is not driven for a few weeks? Or is there a gasket or something that is not ok when it leaks? __________________ My little US vehicle parts business: http://www.thegearheaddepot.com/ Come have a look! ´81 GMC C 10, Spanish Red

01-07-2008, 01:59 PM	#12
LBJ Registered User Join Date: Jun 2007 Location: TEXAS Posts: 378	Re: Too Much Tranny Fluid? I fixed the high fluid level. First I pulled the speedo cable connection. That only dumped about a few ounces. Then I had the bight idea to open to trans cooler line at the radiator. I took a 50/50 guess on the TOP line being the supply line. Wrong! Dumped about 2 quarts of fluid on the drive and all over the right side of the engine compartment. But, after I cleaned that up, the only thing to do was to add about 1.5 quarts and the level is now perfect. Didn't have to screw with dropping the pan or make another trip to the tranny guy. I changed the oil and fliter, checked everything again and took it out on the freeway for a short spin. It drove and perfromed just about right for a 30 year old truck with original engine and rebuilt tranny. Good smooth ride, brakes perfect, no problems at all. Fun.

01-11-2008, 01:12 PM	#13
LBJ Registered User Join Date: Jun 2007 Location: TEXAS Posts: 378	Re: Too Much Tranny Fluid? I talked to the guy who repaired my tranny today. That's his TOTAL business for the last 30 years. Good guy. He said that he would rather have the level a bit high than a bit low or right on the mark. He said that "blowing the seals out" was probably from the 40's or 50's era cars that had leather seals. Everything from the mid 60's forward have been very good and better. He also said that there is a vent that will dump any overages and it has to be PRETTY HIGH to even get to that vent. That's what one of the guys here said to begin with. Spudz, I think it was. So, guess it wasn't too bad after all. I would have liked it if his helper hadn't dumped it all over the engine compartment when filling it. LBJ



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