tranny cooler lines backwards - The 1947 - Present Chevrolet & GMC Truck Message Board Network

m.lander · 04-01-2007, 09:04 PM

what happens if your tranny cooler lines are installed backward?
Which way is the correct way?

cdowns · 04-01-2007, 09:23 PM

not much differance altho you might go faster in reverse

m.lander · 04-01-2007, 09:42 PM

I ask because my tranny has only reverse. it doesn't have L1 L2 D

centsless · 04-01-2007, 09:52 PM

The cooler should not make a difference on that. If the lines go in either the top or the bottom, they can be hooked up any way. If one goes in the top and one in the bottom, make sure the cooler fills from the bottom. out of the trans into the bottom of the cooler, from the top of the cooler back to the trans. I am not sure why you only have reverse.

Longhorn Man · 04-01-2007, 10:12 PM

probably tranny replacement time... the cooler wouldn't do anything in this department.

**WorkinLonghorn** · 04-01-2007, 10:58 PM

FWIW. The lower connection on the tranny is the output one.
This won't effect performance. In the other thread you looked at the internal linkage and I'm assuming it was OK.
>So what did the fluid look/smell like? Did the trans give you any warning signs of impending doom?
>Did you find lots of metal in the pan? (some metal there is normal). Did you find big piles of friction material?

m.lander · 04-02-2007, 12:31 AM

I thought the magnet was the culprit. Although im sure it wasnt helping it wasn't the problem eaither. if i have the trucks rear on stands and shift it with my own hands it will weakly go through the gears but whenever i drop it and hook up the linkage it just wont go except in reverse. I have tried everything i know to try but nothing works. the truck has only been driven 2 miles in six years. could that cause something i dont know of? i guess its time to have it rebuilt i just dont want to for sentimental reasons. but the truck is beautiful and deserves to be driven plus i have like $40,000 dollars on it i should be driving it on weekends. any last thoughts to what i should try are welcome otherwise she is going to the doctor i guess.

cableguy0 · 04-02-2007, 12:37 AM

being driven that little is probably your issue. its very possible you got a gummed up valve body with stuck valves and some seals that have dried up and cracked inside.the only way to know exactly what your issue is would be to tear the trans down and have a look

GREASEMONKEY72 · 04-02-2007, 12:40 AM

well it sounds like the trans needs to be rebuilt

m.lander · 04-02-2007, 12:43 AM

i don't want to hear it but i know its true. thanks for the help.

GREASEMONKEY72 · 04-02-2007, 12:44 AM

i hate to hear it to but goodluck with it

**WorkinLonghorn** · 04-02-2007, 12:50 AM

What about just trying a junkyard valve-body that's been cleaned up? (You didn't answer my questions)

martinkh · 04-02-2007, 02:30 PM

Most cooling situations are set up keeping the "heat rises" principle in mind. 99.9% of the time, in all the applications in the world, you try to draw the cooler coolant into the engine or device, therefore hot stuff goes into the top of the heat exchanger (radiator or tranny cooler), and the cooler stuff comes out the bottom and back into whatever device it is that you are trying to keep cool (tranny, eng etc.)

Hooker · 04-02-2007, 03:44 PM

Might check the fluid level... sometimes when replacing the trans cooler there is not enough fluid in the system and it needs to be topped off for the trans to run properly

04-01-2007, 09:04 PM	#1
m.lander Registered User Join Date: Mar 2007 Location: republic, mo Posts: 38	tranny cooler lines backwards what happens if your tranny cooler lines are installed backward? Which way is the correct way? Last edited by m.lander; 04-01-2007 at 09:20 PM.

04-01-2007, 09:23 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: tranny cooler lines backwards not much differance altho you might go faster in reverse __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

04-01-2007, 09:42 PM	#3
m.lander Registered User Join Date: Mar 2007 Location: republic, mo Posts: 38	Re: tranny cooler lines backwards I ask because my tranny has only reverse. it doesn't have L1 L2 D

04-01-2007, 09:52 PM	#4
centsless sufficiently talented fool Join Date: Jun 2006 Location: Forest Hill, MD Posts: 2,231	Re: tranny cooler lines backwards The cooler should not make a difference on that. If the lines go in either the top or the bottom, they can be hooked up any way. If one goes in the top and one in the bottom, make sure the cooler fills from the bottom. out of the trans into the bottom of the cooler, from the top of the cooler back to the trans. I am not sure why you only have reverse. __________________ "it's impossible to be surrounded by idiots when you are part of the circle" 2003 Suburban 2002 Pontiac Montana 1981 Corvette 1966 Impala Convertible Click here to support the board Last edited by centsless; 04-01-2007 at 09:53 PM.

04-01-2007, 10:12 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: tranny cooler lines backwards probably tranny replacement time... the cooler wouldn't do anything in this department.

04-01-2007, 10:58 PM	#6
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,883	Re: tranny cooler lines backwards FWIW. The lower connection on the tranny is the output one. This won't effect performance. In the other thread you looked at the internal linkage and I'm assuming it was OK. >So what did the fluid look/smell like? Did the trans give you any warning signs of impending doom? >Did you find lots of metal in the pan? (some metal there is normal). Did you find big piles of friction material? __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

04-02-2007, 12:31 AM	#7
m.lander Registered User Join Date: Mar 2007 Location: republic, mo Posts: 38	Re: tranny cooler lines backwards I thought the magnet was the culprit. Although im sure it wasnt helping it wasn't the problem eaither. if i have the trucks rear on stands and shift it with my own hands it will weakly go through the gears but whenever i drop it and hook up the linkage it just wont go except in reverse. I have tried everything i know to try but nothing works. the truck has only been driven 2 miles in six years. could that cause something i dont know of? i guess its time to have it rebuilt i just dont want to for sentimental reasons. but the truck is beautiful and deserves to be driven plus i have like $40,000 dollars on it i should be driving it on weekends. any last thoughts to what i should try are welcome otherwise she is going to the doctor i guess. Last edited by m.lander; 04-02-2007 at 12:32 AM.

04-02-2007, 12:37 AM	#8
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: tranny cooler lines backwards being driven that little is probably your issue. its very possible you got a gummed up valve body with stuck valves and some seals that have dried up and cracked inside.the only way to know exactly what your issue is would be to tear the trans down and have a look __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

04-02-2007, 12:40 AM	#9
GREASEMONKEY72 Registered User Join Date: Aug 2006 Location: Bakersfield,CA Posts: 7,893	Re: tranny cooler lines backwards well it sounds like the trans needs to be rebuilt __________________ -steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME

04-02-2007, 12:43 AM	#10
m.lander Registered User Join Date: Mar 2007 Location: republic, mo Posts: 38	Re: tranny cooler lines backwards i don't want to hear it but i know its true. thanks for the help.

04-02-2007, 12:44 AM	#11
GREASEMONKEY72 Registered User Join Date: Aug 2006 Location: Bakersfield,CA Posts: 7,893	Re: tranny cooler lines backwards i hate to hear it to but goodluck with it __________________ -steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME

04-02-2007, 12:50 AM	#12
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,883	Re: tranny cooler lines backwards What about just trying a junkyard valve-body that's been cleaned up? (You didn't answer my questions) __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

04-02-2007, 02:30 PM	#13
martinkh Registered User Join Date: Mar 2007 Location: Boise Posts: 107	Re: tranny cooler lines backwards Most cooling situations are set up keeping the "heat rises" principle in mind. 99.9% of the time, in all the applications in the world, you try to draw the cooler coolant into the engine or device, therefore hot stuff goes into the top of the heat exchanger (radiator or tranny cooler), and the cooler stuff comes out the bottom and back into whatever device it is that you are trying to keep cool (tranny, eng etc.) __________________ '70gmc 3/4ton 4X4, re-arch and 2" add-a-leaf lift. '77 400sbc, '82 axles, d60front, 14bolt rear. Probably some 285/75/16 Toyo m/t's on my stock rims coming up.

04-02-2007, 03:44 PM	#14
Hooker aka TEX-TOY Join Date: Jan 2007 Location: Kentucky Posts: 127	Re: tranny cooler lines backwards Might check the fluid level... sometimes when replacing the trans cooler there is not enough fluid in the system and it needs to be topped off for the trans to run properly __________________ 1969 Chevy C10 SWB w/ disk brakes and soon to be lowered with spindles and springs!!!! Getting a paint job like a Army Chinook Helicopter!!!! HOOKERS RULE!! BRAND NEW WIFE BOUGHT IT FOR ME AS A WEDDING GIFT!!! SHE IS THE BOMB!!!!!!



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