Uh Oh!!.. Slipping. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DanoDMano · 03-07-2003, 06:36 PM

I was driving home from the College today and when trying to leave the parking spot I was in, It took awhile for transmission to engage in reverse. It works fine in drive, but there is a big hesitation when trying to move in reverse.

Could I be loosing my tranny? I changed out the fluid, and replaced the gasket about 6 months ago, and have had a
slow leak after sitting for while. The fluid always reads full though?

Does anyone know what might cause the slip or hesitation?
How can the dipstick always read full, when I have been leaking forever?

I was thinking maybe the stick is too long???

Confused??

**COBALT** · 03-07-2003, 07:09 PM

What did your transmission pan have in it when you replaced the gasket and filter? This was six months ago, and it just started slipping now? Do you smell anything? What about slipping after you're in gear and you've driven down the road a bit? How does upshift, downshift, and detent behave?

DanoDMano · 03-07-2003, 07:15 PM

It was good, just wanted to the replace the gasket. Other
than the slipping in reverse, I have never had any other
problems?

It doesnt seem to shift hard, and kicks down when I need
it to? I did hear a pop when I kicked it down once.

The fluid looks fairly red, maybe a little more towards the
gold side?

my new 72 · 03-07-2003, 07:25 PM

Mine does the same thing, it even slips when in gear. It also takes forever to upshift sometimes too. I have to let off the gas to get it to shift. But I know mine is going.

jmanz69 · 03-07-2003, 08:11 PM

Could be you have some gook in your valve body. When you replaced the gasket and fluid, you maye have knocked some sludge loose and is now in you passages. If you don't mind taking it apart again, you could remove the valve body and make sure it's clean. Other than that, I would say you may be loosing the reverse band/clutch. Not good, but how often are you in reverse anyway.

When I had my TH-350 installed, it had no forward gear, but would go all day in reverse. When it was taken apart, it was discovered someone had put a small amount of sawdust in the fluid to get it to drive into the junkyard. After it sat for a while, it got hard, and wouldn't go anymore. Bummer for me.

72shadetree · 03-07-2003, 10:03 PM

mine started like that and trans shop said it was the pump but it was old and i had the whole thing rebuilt

dubie · 03-07-2003, 10:07 PM

The tranny in my 82 GMC did the same thing. It crapped out on me about 6 months later.

Longhorn Man · 03-08-2003, 01:01 AM

The gold you see in your fluid is not a good sign...I'd drop the pan and replace the filter once more....but it is probably on its death bed.

**COBALT** · 03-08-2003, 09:15 PM

Gold is results from varnishing of your friction plates. Time for a rebuild, and I'd do it before your transmission decides to rebel completely. You don't want to damage anything.

DanoDMano · 03-09-2003, 01:11 PM

Could anyone tell me the fluid capacity of the stock turbo 350
in my truck??

The last time I emptied it there wasnt much there, but the stick read full.....

I am going to drop the pan, and inspect the valve body and filter and want to make sure I refill enough, but not too much.

03-07-2003, 06:36 PM	#1
DanoDMano Pronounced "Pew-al-up" Join Date: Oct 2002 Location: Puyallup, Washington Posts: 845	Uh Oh!!.. Slipping. I was driving home from the College today and when trying to leave the parking spot I was in, It took awhile for transmission to engage in reverse. It works fine in drive, but there is a big hesitation when trying to move in reverse. Could I be loosing my tranny? I changed out the fluid, and replaced the gasket about 6 months ago, and have had a slow leak after sitting for while. The fluid always reads full though? Does anyone know what might cause the slip or hesitation? How can the dipstick always read full, when I have been leaking forever? I was thinking maybe the stick is too long??? Confused?? __________________ Classic GM Trucks of Washington Club Member 1970 FS chevy,350/350, Edelbrock cam and intake. Holley 650 carb,HEI,AT,Tangier Orange, 18's, Power Locks, Truck Photos

03-07-2003, 07:09 PM	#2
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	What did your transmission pan have in it when you replaced the gasket and filter? This was six months ago, and it just started slipping now? Do you smell anything? What about slipping after you're in gear and you've driven down the road a bit? How does upshift, downshift, and detent behave? __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

03-07-2003, 07:15 PM	#3
DanoDMano Pronounced "Pew-al-up" Join Date: Oct 2002 Location: Puyallup, Washington Posts: 845	It was good, just wanted to the replace the gasket. Other than the slipping in reverse, I have never had any other problems? It doesnt seem to shift hard, and kicks down when I need it to? I did hear a pop when I kicked it down once. The fluid looks fairly red, maybe a little more towards the gold side? __________________ Classic GM Trucks of Washington Club Member 1970 FS chevy,350/350, Edelbrock cam and intake. Holley 650 carb,HEI,AT,Tangier Orange, 18's, Power Locks, Truck Photos

03-07-2003, 07:25 PM	#4
my new 72 faster, faster, faster Join Date: Dec 2001 Location: Houston ,Texas ,USA Posts: 1,354	Mine does the same thing, it even slips when in gear. It also takes forever to upshift sometimes too. I have to let off the gas to get it to shift. But I know mine is going. __________________ I'm going to Law School, wanna debate? It's good practice.

03-07-2003, 10:03 PM	#6
72shadetree KEEP ON TRUCKING Join Date: Sep 2000 Location: martinsville va Posts: 2,563	mine started like that and trans shop said it was the pump but it was old and i had the whole thing rebuilt __________________ 72 cheyenne 2wd lwb 71 k20 sons bassett va

03-07-2003, 08:11 PM	#5
jmanz69 Careful, they attack... Join Date: Aug 2001 Location: Waterford, MI, USA Posts: 1,107	Could be you have some gook in your valve body. When you replaced the gasket and fluid, you maye have knocked some sludge loose and is now in you passages. If you don't mind taking it apart again, you could remove the valve body and make sure it's clean. Other than that, I would say you may be loosing the reverse band/clutch. Not good, but how often are you in reverse anyway. When I had my TH-350 installed, it had no forward gear, but would go all day in reverse. When it was taken apart, it was discovered someone had put a small amount of sawdust in the fluid to get it to drive into the junkyard. After it sat for a while, it got hard, and wouldn't go anymore. Bummer for me.

03-07-2003, 10:07 PM	#7
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	The tranny in my 82 GMC did the same thing. It crapped out on me about 6 months later. __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

03-08-2003, 01:01 AM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	The gold you see in your fluid is not a good sign...I'd drop the pan and replace the filter once more....but it is probably on its death bed.

03-08-2003, 09:15 PM	#9
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Gold is results from varnishing of your friction plates. Time for a rebuild, and I'd do it before your transmission decides to rebel completely. You don't want to damage anything. __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

03-09-2003, 01:11 PM	#10
DanoDMano Pronounced "Pew-al-up" Join Date: Oct 2002 Location: Puyallup, Washington Posts: 845	Could anyone tell me the fluid capacity of the stock turbo 350 in my truck?? The last time I emptied it there wasnt much there, but the stick read full..... I am going to drop the pan, and inspect the valve body and filter and want to make sure I refill enough, but not too much. __________________ Classic GM Trucks of Washington Club Member 1970 FS chevy,350/350, Edelbrock cam and intake. Holley 650 carb,HEI,AT,Tangier Orange, 18's, Power Locks, Truck Photos



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