Front seal on tranny is leaking.....
03-21-2019, 03:34 AM
#1
Melting Slicks
Thread Starter
Front seal on tranny is leaking.....
How hard is to drop the tranny on a C4? Can I just separate it from the motor and slid it back far enough to pull the old seal out or do I need to drop it completely out? It only has 40,000 miles on a 95 and I just noticed 3 small spots it’s leaking from right under the inspection cover. I am guessing it’s the front pump seal. I am not new to any of this mechanical stuff but am new to owning a C4. Any help would be greatly appreciated. Thanks in advance.
03-21-2019, 05:32 AM
#2
Le Mans Master
The front pump on my 86 was leaking when I bought it. I pulled the tranny myself, in the back yard with the car up on blocks. You have to take the C-beam loose and support the engine. the tranny itself is like any other to pull. I took my tranny to a shop to be rebuilt " as long as its out" sort of thing. I am told when replacing the front seal, keep the torque Converter on it till your ready to work on it. By the way, the tourque in the 86 has the best stall speed. One from a V-6 s 10 pickup is the same I believe. best of luck.
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ZHammer (03-21-2019)
03-21-2019, 05:29 PM
#3
Melting Slicks
Thread Starter
The front pump on my 86 was leaking when I bought it. I pulled the tranny myself, in the back yard with the car up on blocks. You have to take the C-beam loose and support the engine. the tranny itself is like any other to pull. I took my tranny to a shop to be rebuilt " as long as its out" sort of thing. I am told when replacing the front seal, keep the torque Converter on it till your ready to work on it. By the way, the tourque in the 86 has the best stall speed. One from a V-6 s 10 pickup is the same I believe. best of luck.
03-21-2019, 05:35 PM
#4
Melting Slicks
Member Since: Nov 2013
Location: Greater Cincinnati Area.
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Pulling a C4 Transmission is a piece of cake. The hardest part is screwing the C Beam around, back and out of the way.
When diagnosing leaks at the front, examine the converter snout and pump bushing for wear. The bushing takes the pressure and if it is worn you'll do it all and it will leak anyway.
When diagnosing leaks at the front, examine the converter snout and pump bushing for wear. The bushing takes the pressure and if it is worn you'll do it all and it will leak anyway.
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ZHammer (03-22-2019)
03-21-2019, 07:20 PM
#5
Race Director
My car literally lives on jackstands. After a race, it's into the garage and up on stands. It survived the 7.0 mangitude Loma Prieta earthquake in the Bay Area in 1989 while on jackstands. You should have no problems with jackstands.
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ZHammer (03-22-2019)
03-22-2019, 01:04 AM
#6
Melting Slicks
Thread Starter
Pulling a C4 Transmission is a piece of cake. The hardest part is screwing the C Beam around, back and out of the way.
When diagnosing leaks at the front, examine the converter snout and pump bushing for wear. The bushing takes the pressure and if it is worn you'll do it all and it will leak anyway.
When diagnosing leaks at the front, examine the converter snout and pump bushing for wear. The bushing takes the pressure and if it is worn you'll do it all and it will leak anyway.
03-22-2019, 01:05 AM
#7
Melting Slicks
Thread Starter
03-22-2019, 01:06 AM
#8
Melting Slicks
Thread Starter
No, a 1986 converter won't work in a 95 for two reasons:
A: The spline count on the input shaft is different.
B: The converter clutch strategy in a 95 is Pulse Width Modulated. The clutch material in a PWM converter is different than a non-PWM converter. If you don't modify the transmission for non-PWM strategy, you must use a converter with the correct clutch material for PWM, or the clutch will quickly fail.
A: The spline count on the input shaft is different.
B: The converter clutch strategy in a 95 is Pulse Width Modulated. The clutch material in a PWM converter is different than a non-PWM converter. If you don't modify the transmission for non-PWM strategy, you must use a converter with the correct clutch material for PWM, or the clutch will quickly fail.
MAN! You guys are a wealth of information. I love this place.
