Transmission Gasket?
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,841
Likes: 3
From: Halifax, NS, Canada
Transmission Gasket?
Does Felpro make a transmission gasket similiar to the one they make for the oil pan? When I was detailing my car this winter I replaced the tranny filter and gasket and I have not even been running the car yet and the pan gasket is already seeping fluid and dropping on the floor. What is the story on replacing these gaskets so they won't leak?
[Modified by Binnie77, 3:06 PM 2/17/2002]
[Modified by Binnie77, 3:06 PM 2/17/2002]
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Re: Transmission Gasket? (Binnie77)
I seen too many cork gaskets leaking, and I have NEVER, not ONCE ever had one that did NOT leak....if you got cork, you got a leak....
now having said that....I cured a 400 tranny once, by cleaning VERY carefully everything....pan, housing, etc....get RID of the drips....
use RTV silicone seal Black O2 proof stuff, and NO GASKET....
it weeped a bit, but no drips....make sure the dipstick tube is fresh O ring too...
GENE
now having said that....I cured a 400 tranny once, by cleaning VERY carefully everything....pan, housing, etc....get RID of the drips....
use RTV silicone seal Black O2 proof stuff, and NO GASKET....
it weeped a bit, but no drips....make sure the dipstick tube is fresh O ring too...
GENE
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,841
Likes: 3
From: Halifax, NS, Canada
Re: Transmission Gasket? (mrvette)
I seen too many cork gaskets leaking, and I have NEVER, not ONCE ever had one that did NOT leak....if you got cork, you got a leak....
now having said that....I cured a 400 tranny once, by cleaning VERY carefully everything....pan, housing, etc....get RID of the drips....
use RTV silicone seal Black O2 proof stuff, and NO GASKET....
it weeped a bit, but no drips....make sure the dipstick tube is fresh O ring too...
GENE
now having said that....I cured a 400 tranny once, by cleaning VERY carefully everything....pan, housing, etc....get RID of the drips....
use RTV silicone seal Black O2 proof stuff, and NO GASKET....
it weeped a bit, but no drips....make sure the dipstick tube is fresh O ring too...
GENE
Melting Slicks
Joined: Aug 2000
Posts: 2,310
Likes: 1
Re: Transmission Gasket? (Binnie77)
FWIW, my cork gasket has not leaked since I put it on about a year ago (wood :smash: ). Of course, maybe that's because I leak enough at the front seal :rolleyes:
Anyway, you want the mating surfaces very clean (no old gasket material or anything on them). Make sure you didn't warp, gouge, or bend any part of the mating surface on the pan. And finally, torque the bolts down to spec. Overtightening (at least a cork gasket) is a big no-no.
Hope you can get it stopped, leaks SUCK!
BTW, sorry, I didn't answer your question :crazy:
[Modified by jerryp58, 2:03 PM 2/17/2002]
Anyway, you want the mating surfaces very clean (no old gasket material or anything on them). Make sure you didn't warp, gouge, or bend any part of the mating surface on the pan. And finally, torque the bolts down to spec. Overtightening (at least a cork gasket) is a big no-no.
Hope you can get it stopped, leaks SUCK!
BTW, sorry, I didn't answer your question :crazy:
[Modified by jerryp58, 2:03 PM 2/17/2002]
Pro
Joined: Apr 2001
Posts: 591
Likes: 0
From: Morinville Alberta
Re: Transmission Gasket? (jerryp58)
I have leaks from the front seal and where the speedometer cable goes in.
the front seal I will deal with when I rebuild the tranny but the other one I would like to fix now.
How is it done.
Thanks
the front seal I will deal with when I rebuild the tranny but the other one I would like to fix now.
How is it done.
Thanks
Melting Slicks
Joined: Aug 2000
Posts: 2,310
Likes: 1
Re: Transmission Gasket? (Aaron76)
Aaron76,
This was a relatively easy fix on my TH350. There were two gaskets for the speedo gear. Have you had the speedo cable off? If not, simply screw the "nut" holding the cable off and pull the cable out. Then there is one bolt holding a small plate that holds the speedo gear housing in place. Remove that bolt and plate and the speedo gear housing should pull out. One of the seals is simply an O-ring on the outside of the housing. The other is a O-cup sorta ring that the speedo gear shaft goes through. You should be able to pick up both at your local Chevy dealership (I don't know if auto parts stores carry them). A little trans fluid will seep out during the process. Also, when you put the new seals in, coat them lightly with trans fluid.
I think that's all there is to it. Hope it helps. Good Luck!
This was a relatively easy fix on my TH350. There were two gaskets for the speedo gear. Have you had the speedo cable off? If not, simply screw the "nut" holding the cable off and pull the cable out. Then there is one bolt holding a small plate that holds the speedo gear housing in place. Remove that bolt and plate and the speedo gear housing should pull out. One of the seals is simply an O-ring on the outside of the housing. The other is a O-cup sorta ring that the speedo gear shaft goes through. You should be able to pick up both at your local Chevy dealership (I don't know if auto parts stores carry them). A little trans fluid will seep out during the process. Also, when you put the new seals in, coat them lightly with trans fluid.
I think that's all there is to it. Hope it helps. Good Luck!
Pro
Joined: Apr 2001
Posts: 591
Likes: 0
From: Morinville Alberta
Re: Transmission Gasket? (jerryp58)
jerryp58:
Thanks for the info I will look for those parts this week.
do you think they have new speedo gears as well I think mine is inaccurate but I don't know which one I would need here is my info.
350,Th350 tranny, 3.08 rear end 235-60-15 tires.
thank you. :cheers:
Thanks for the info I will look for those parts this week.
do you think they have new speedo gears as well I think mine is inaccurate but I don't know which one I would need here is my info.
350,Th350 tranny, 3.08 rear end 235-60-15 tires.
thank you. :cheers:
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Re: Transmission Gasket? (jerryp58)
I don't know, I just have no luck with cork, I have tried all sorts of tightening sequences and torque from thumb tight to clamp hell out of it...
never lasted too long...I think it's luck of the draw,....
that GM gray thing didn't work for me either once.....since then for me anyway,...it's RTV and forgetaboutit....
GENE
never lasted too long...I think it's luck of the draw,....
that GM gray thing didn't work for me either once.....since then for me anyway,...it's RTV and forgetaboutit....
GENE
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Drifting
Joined: Mar 2001
Posts: 1,396
Likes: 7
From: Indiana
Re: Transmission Gasket? (jerryp58)
FWIW, my cork gasket has not leaked since I put it on about a year ago (wood :smash: ). Of course, maybe that's because I leak enough at the front seal :rolleyes:
Anyway, you want the mating surfaces very clean (no old gasket material or anything on them). Make sure you didn't warp, gouge, or bend any part of the mating surface on the pan. And finally, torque the bolts down to spec. Overtightening (at least a cork gasket) is a big no-no.
Hope you can get it stopped, leaks SUCK!
BTW, sorry, I didn't answer your question :crazy:
[Modified by jerryp58, 2:03 PM 2/17/2002]
Anyway, you want the mating surfaces very clean (no old gasket material or anything on them). Make sure you didn't warp, gouge, or bend any part of the mating surface on the pan. And finally, torque the bolts down to spec. Overtightening (at least a cork gasket) is a big no-no.
Hope you can get it stopped, leaks SUCK!
BTW, sorry, I didn't answer your question :crazy:
[Modified by jerryp58, 2:03 PM 2/17/2002]
Good Luck, Tom
Melting Slicks
Joined: Aug 2000
Posts: 2,310
Likes: 1
Re: Transmission Gasket? (Aaron76)
Yes, I would think you'd be able to get the speedo gears at your Chevy dealership. I think you should remove the one in there and take it with you. For some reason, my TH350 has a small diameter gear versus the larger one :confused:
I'm not sure why yours would be off. Your tires might have a slightly smaller diameter than stock. Do you think the speedo reads high? Maybe someone has the wrong speedo gear in there. Anyway, according to the ZIP catalog; one tooth = 1-1/2 MPH and you add teeth to slow the speedo down, remove teeth to speed it up. So, count the teeth on your existing gear and work from there.
Jerry
I'm not sure why yours would be off. Your tires might have a slightly smaller diameter than stock. Do you think the speedo reads high? Maybe someone has the wrong speedo gear in there. Anyway, according to the ZIP catalog; one tooth = 1-1/2 MPH and you add teeth to slow the speedo down, remove teeth to speed it up. So, count the teeth on your existing gear and work from there.
Jerry