New Burb Question... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GMCjunkie · 07-02-2004, 07:54 AM

My transmission pan is leaking around the gasket, I havent done it before, but, I know cant be that hard of a task to change, but any advice or tips to make it easier, or quicker would be appreciated. Things to "look out" for or "no-no's" Also, there a filter in there too, is there not??

Thanks again!!!
junk

72gord · 07-02-2004, 08:09 AM

If your pan doesn't have a drain plug (most don't) loosen the bolts and let it down on one end (usually front) and drain into large pan to catch fluid. If it is a turbo 350 it will have a square filter with two screws in the middle holding it in place on the valve body (just remove and replace) sometimes there will be a little build up of stuff in the pan, (normal cluch wear) wipe that out, clean off the old gasket and put her back together. Add fluid as needed and should be good to go. Some use a small amount of silicone gasket sealer on the gasket to help seal it, but not alot, don't want it getting into the fluid and plugging something inside the transmission. Not too tough, just a dirty job...good luck, Gord

Dean · 07-02-2004, 08:20 AM

You might have a drain plug. I know all of my K20s do. Sure makes it a lot easier. Fully expect to be wearing transmission fluid if you don't....lol.

I agree not that big of a job but very messy. Filter is easy to change as well.

We will be waiting for pics...

JimKshortstep4x4 · 07-02-2004, 08:29 AM

I am not sure if it happens to everyone else, but we end up with fluid everywhere, so we cover the floor with newspapers to catch the fluid. The transmissions seem to drip forever.

I would also suggest checking the shift lever shaft seal as when it leaks it shows up on the pan and makes the pan look like it is leaking.

Jim

busterwivell · 07-02-2004, 10:47 AM

JimK is right. I've had that happen more than once. It's common on vehicles that sit for extended times. They claim the converter unloads and raises the fluid level to create that leak. And, yes, it's a messy job. The pics we want are of you, Jodie, after you've dropped the pan. You're going to be dirty.

oldsub86 · 07-02-2004, 12:54 PM

If it does not have a pan plug, now a real good time to put one in. They are not expensive and make the next change much cleaner.
If you put in a plug, you might want to tack weld the part inside the pan so it cannot turn later.

**oldiron** · 07-02-2004, 01:05 PM

If you decide to replace the filter buy one that has the gasket packaged flat insted of waded up inside of a box. It makes life alot easier than to have to flaten a gasket out.
Have fun.

junkyardjohn · 07-02-2004, 04:36 PM

Quote:

Originally Posted by oldiron

If you decide to replace the filter buy one that has the gasket packaged flat insted of waded up inside of a box. It makes life alot easier than to have to flaten a gasket out.
Have fun.

JODIE -- IT'S A MESSY JOB & A MAJOR PITA. DON'T SCRIMP ON THE GASKET. GET A GOOD THICK CORK ONE (NOT THE THIN PAPER TYPE). I USSUALLY GET MINE FROM A LOCAL TRANSMISSION SHOP WHERE THEY BUY THEM IN BULK & GET THE GOOD ONES. IF IT'S TWISTED OR NOT FLAT, A GOOD IRONING WILL MAKE IT FLAT AGAIN. I NEVER EVER PUT SILICONE ON THEM. JUST MAKE SURE THE TRANNY SURFACE & THE PAN SURFACE ARE GOOD & CLEAN. (I LIKE TO WIPE EM DOWN WITH LAQUER THINNER) BE CAREFUL NOT TO OVERTIGHTEN THE PAN AS THEY WARP REALLY EASILY & TIGHTEN THEM ALL UP A LITTLE AT A TIME. I FIND THAT A 1/4" RATCHETT OR EVEN A NUT DRIVER SUPPLIES ALL THE TORQUE NEEDED.

JOHN

Bowtie67 · 07-02-2004, 05:19 PM

Quote:

Originally Posted by junkyardjohn

JODIE -- IT'S A MESSY JOB & A MAJOR PITA. DON'T SCRIMP ON THE GASKET. GET A GOOD THICK CORK ONE (NOT THE THIN PAPER TYPE). I USSUALLY GET MINE FROM A LOCAL TRANSMISSION SHOP WHERE THEY BUY THEM IN BULK & GET THE GOOD ONES. IF IT'S TWISTED OR NOT FLAT, A GOOD IRONING WILL MAKE IT FLAT AGAIN. I NEVER EVER PUT SILICONE ON THEM. JUST MAKE SURE THE TRANNY SURFACE & THE PAN SURFACE ARE GOOD & CLEAN. (I LIKE TO WIPE EM DOWN WITH LAQUER THINNER) BE CAREFUL NOT TO OVERTIGHTEN THE PAN AS THEY WARP REALLY EASILY & TIGHTEN THEM ALL UP A LITTLE AT A TIME. I FIND THAT A 1/4" RATCHETT OR EVEN A NUT DRIVER SUPPLIES ALL THE TORQUE NEEDED.

JOHN

This is good advice here Jodie, no one else mentioned about over tightening these bolts which I have seen that a lot of, People have a tendancy to overtighten the bolts and it squishes & breaks the gasket. I never use any silicon either.

crazy longhorn · 07-02-2004, 05:31 PM

Ditto on the gasket.....I like a good cork gasket..... just smear a little axle bearing grease on both sides of the gasket & stick it to the pan. A little rtv wont hurt anything , if you like that route better.....just stay away from the "sticky sealers" that can be dissolved by hot ATF(they will cause problems). Best of luck,crazyL

krue · 07-02-2004, 06:15 PM

I got a rubber gasket from OReilly's and I like it better than the cork. I have reused it several times with no problems.

GMCjunkie · 07-03-2004, 03:58 AM

Thanks everyone!! Hoping to get to this project really soon. Weather and days off permitting. Another Q.. How much tranny fluid will it take to fill it back up again??

Y'aller wanting pics??!!

..

.... youre crazy!! Be careful what you wish for, lol

GMCjunkie · 07-03-2004, 04:03 AM

JimK... Whats a "shift lever shaft"?? Where is it located and what does it look like?? Does this have a gasket also?? Thanks

JimKshortstep4x4 · 07-03-2004, 06:33 AM

GMC Junkie,

If you follow the shift linkage to the transmission, there is a 1/2" diameter shaft that the linkage connects to on the outside of the shaft. The shaft
goes from the outside of the transmission to the inside where it shifts the valve. The shaft is sealed by a pressed in lip seal.

I can fax you a couple of pics of the shaft and seal if you like. They are in a transmission manual and it shows removal of the seal, outside view and inside view of the shaft and linkage.

Jim

Blue Beard · 07-03-2004, 06:57 AM

Jodie, we all have faith in your ability....

What did you find with the fuel problem you were having?

deth_1970 · 07-03-2004, 07:15 AM

hello all, I did see one point that was not covered, and is really over looked, is if the pan has been over tightened, and caused the pan around the bolt holes, to distort, causing it not to seal properly not how tight you get it, I have used a ball peen hammer as a dolly, and set the pan edge on a work bench, and with anoth hammer tapped the ball peen hammer till, it was flush with the rest of the pans mating surface, anyone correct me if I am wrong here,

ChevLoRay · 07-03-2004, 09:31 AM

deth 1970 hit on what I saw was missing. It's one of those "little" things that drive you nuts.

Yeah, Jodie, what about your sputtering problem....did you get it fixed? What did you find the problem to be?

krue · 07-03-2004, 11:35 AM

For her previous problem check this thread.http://67-72chevytrucks.com/vboard/s....php3?t=110294

GMCjunkie · 07-03-2004, 03:57 PM

JimK,, thanks, If it comes about that I need to change that, Ill have you send or post pics, thanks for your trouble.

Blue beard... thanks, Im glad someone has faith, lol Yes the other problem was mainly the "module" and the "vacuum advance"... She runs like a bat outta hell now!!

deth 1970... and Chevloray... thanks, I will be sure to check for that...

Krue.. thanks to you for posting the link to my previous post.
y'all take care and THANKS a bunch!!!

A few 72's · 07-04-2004, 02:15 AM

Holds 10 quarts total & 5 pints for refill, per 72 owner's manual.
A portion of the fluid will stay in the converter, but would have extra on hand for any drain down. Seems like I used more than 5 pints last time, but its been awhile.

GMCjunkie · 07-04-2004, 03:43 AM

A few 72's.. Thank You, I appreciate it!!

07-02-2004, 07:54 AM	#1
GMCjunkie Dude...I'm a CHICK Join Date: Jul 2000 Location: Lakeland Georgia Posts: 6,192	New Burb Question... My transmission pan is leaking around the gasket, I havent done it before, but, I know cant be that hard of a task to change, but any advice or tips to make it easier, or quicker would be appreciated. Things to "look out" for or "no-no's" Also, there a filter in there too, is there not?? Thanks again!!! junk __________________ ~~~~~~~~~~~~~* "The unexamined life is not worth living" -Socrates ~~~~~~~~~~~~~* '71 GMC Suburban 4x4

07-02-2004, 10:47 AM	#5
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	JimK is right. I've had that happen more than once. It's common on vehicles that sit for extended times. They claim the converter unloads and raises the fluid level to create that leak. And, yes, it's a messy job. The pics we want are of you, Jodie, after you've dropped the pan. You're going to be dirty. __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com

07-02-2004, 12:54 PM	#6
oldsub86 Registered User Join Date: Dec 2002 Location: Canada Posts: 695	If it does not have a pan plug, now a real good time to put one in. They are not expensive and make the next change much cleaner. If you put in a plug, you might want to tack weld the part inside the pan so it cannot turn later. __________________ 1968 Chevy - 292 with a powerglide

07-02-2004, 01:05 PM	#7
oldiron Designated Grumpy Old Man Join Date: Oct 2001 Location: arlington, washington usa Posts: 3,095	If you decide to replace the filter buy one that has the gasket packaged flat insted of waded up inside of a box. It makes life alot easier than to have to flaten a gasket out. Have fun. __________________ Never let the truth get in the way of a good story 71 Chev 1/2 ton 4X4 LWB Fleetside SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=361222 http://www.youtube.com/watch?v=1LgREwtDfaA 68 Chev 1 ton flat bed http://www.youtube.com/watch?v=0bO8szzlD4A 56 Chev Handyman Wagon http://www.youtube.com/watch?v=9y-6ddpBTkM http://www.youtube.com/watch?v=lbLzZ7zY8wA 56 Chev Belair http://67-72chevytrucks.com/vboard/s...d.php?t=410667 http://www.youtube.com/watch?v=xoW0Ei7ZNIg

07-02-2004, 05:31 PM	#10
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	Ditto on the gasket.....I like a good cork gasket..... just smear a little axle bearing grease on both sides of the gasket & stick it to the pan. A little rtv wont hurt anything , if you like that route better.....just stay away from the "sticky sealers" that can be dissolved by hot ATF(they will cause problems). Best of luck,crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

07-02-2004, 08:09 AM	#2
72gord Never enough time!! Join Date: Mar 2004 Location: sw Wisconsin Posts: 602	If your pan doesn't have a drain plug (most don't) loosen the bolts and let it down on one end (usually front) and drain into large pan to catch fluid. If it is a turbo 350 it will have a square filter with two screws in the middle holding it in place on the valve body (just remove and replace) sometimes there will be a little build up of stuff in the pan, (normal cluch wear) wipe that out, clean off the old gasket and put her back together. Add fluid as needed and should be good to go. Some use a small amount of silicone gasket sealer on the gasket to help seal it, but not alot, don't want it getting into the fluid and plugging something inside the transmission. Not too tough, just a dirty job...good luck, Gord

07-02-2004, 08:20 AM	#3
Dean Senior Member Join Date: Jan 2000 Location: Cincinnati, Ohio Posts: 1,492	You might have a drain plug. I know all of my K20s do. Sure makes it a lot easier. Fully expect to be wearing transmission fluid if you don't....lol. I agree not that big of a job but very messy. Filter is easy to change as well. We will be waiting for pics...

07-02-2004, 08:29 AM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	I am not sure if it happens to everyone else, but we end up with fluid everywhere, so we cover the floor with newspapers to catch the fluid. The transmissions seem to drip forever. I would also suggest checking the shift lever shaft seal as when it leaks it shows up on the pan and makes the pan look like it is leaking. Jim

07-02-2004, 06:15 PM	#11
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	I got a rubber gasket from OReilly's and I like it better than the cork. I have reused it several times with no problems. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

07-03-2004, 03:58 AM	#12
GMCjunkie Dude...I'm a CHICK Join Date: Jul 2000 Location: Lakeland Georgia Posts: 6,192	Thanks everyone!! Hoping to get to this project really soon. Weather and days off permitting. Another Q.. How much tranny fluid will it take to fill it back up again?? Y'aller wanting pics??!! .. .... youre crazy!! Be careful what you wish for, lol __________________ ~~~~~~~~~~~~~* "The unexamined life is not worth living" -Socrates ~~~~~~~~~~~~~* '71 GMC Suburban 4x4

07-03-2004, 04:03 AM	#13
GMCjunkie Dude...I'm a CHICK Join Date: Jul 2000 Location: Lakeland Georgia Posts: 6,192	JimK... Whats a "shift lever shaft"?? Where is it located and what does it look like?? Does this have a gasket also?? Thanks __________________ ~~~~~~~~~~~~~* "The unexamined life is not worth living" -Socrates ~~~~~~~~~~~~~* '71 GMC Suburban 4x4

07-03-2004, 06:33 AM	#14
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	GMC Junkie, If you follow the shift linkage to the transmission, there is a 1/2" diameter shaft that the linkage connects to on the outside of the shaft. The shaft goes from the outside of the transmission to the inside where it shifts the valve. The shaft is sealed by a pressed in lip seal. I can fax you a couple of pics of the shaft and seal if you like. They are in a transmission manual and it shows removal of the seal, outside view and inside view of the shaft and linkage. Jim

07-03-2004, 06:57 AM	#15
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	Jodie, we all have faith in your ability.... What did you find with the fuel problem you were having? __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

07-03-2004, 07:15 AM	#16
deth_1970 Registered User Join Date: Jul 2004 Location: Braggs, okla Posts: 161	hello all, I did see one point that was not covered, and is really over looked, is if the pan has been over tightened, and caused the pan around the bolt holes, to distort, causing it not to seal properly not how tight you get it, I have used a ball peen hammer as a dolly, and set the pan edge on a work bench, and with anoth hammer tapped the ball peen hammer till, it was flush with the rest of the pans mating surface, anyone correct me if I am wrong here,

07-03-2004, 09:31 AM	#17
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	deth 1970 hit on what I saw was missing. It's one of those "little" things that drive you nuts. Yeah, Jodie, what about your sputtering problem....did you get it fixed? What did you find the problem to be? __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.



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07-03-2004, 11:35 AM	#18
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	For her previous problem check this thread.http://67-72chevytrucks.com/vboard/s....php3?t=110294 __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

07-03-2004, 03:57 PM	#19
GMCjunkie Dude...I'm a CHICK Join Date: Jul 2000 Location: Lakeland Georgia Posts: 6,192	JimK,, thanks, If it comes about that I need to change that, Ill have you send or post pics, thanks for your trouble. Blue beard... thanks, Im glad someone has faith, lol Yes the other problem was mainly the "module" and the "vacuum advance"... She runs like a bat outta hell now!! deth 1970... and Chevloray... thanks, I will be sure to check for that... Krue.. thanks to you for posting the link to my previous post. y'all take care and THANKS a bunch!!! __________________ ~~~~~~~~~~~~~* "The unexamined life is not worth living" -Socrates ~~~~~~~~~~~~~* '71 GMC Suburban 4x4

07-04-2004, 02:15 AM	#20
A few 72's Registered User Join Date: Mar 2004 Location: Alabama Posts: 705	Holds 10 quarts total & 5 pints for refill, per 72 owner's manual. A portion of the fluid will stay in the converter, but would have extra on hand for any drain down. Seems like I used more than 5 pints last time, but its been awhile. __________________ 1972 C10 SWB 350 / T400 1972 SWB GMC 350/T350 1972 Cheyenne 20 super "long horn". 402BB / T400 1972 Suburban C10 Deluxe 350 / T350 and a few more.. http://www.myspace.com/afew72s

07-04-2004, 03:43 AM	#21
GMCjunkie Dude...I'm a CHICK Join Date: Jul 2000 Location: Lakeland Georgia Posts: 6,192	A few 72's.. Thank You, I appreciate it!! __________________ ~~~~~~~~~~~~~* "The unexamined life is not worth living" -Socrates ~~~~~~~~~~~~~* '71 GMC Suburban 4x4

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