Leaky 700R4
#1
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Car: 86 IROC-Z, 98 Z28
Engine: 370 LSx, LS1
Transmission: T56's
Axle/Gears: 3.73, 3.42
Leaky 700R4
So after searching I read that a front torque converter seal wont leak when sitting, but will when running since its a pressure seal. The trans doesn't leak with the motor running, or in gear. At least nothing noticeable or that I can see while hanging my head out the car. After I shut the car off I took a peeked under the car. I could see the transmission fluid rolling down the torque converter.
Does this sound like a leaky front seal?
Does this sound like a leaky front seal?
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Car: 1988 camaro z28,1997 camaro lt1
Engine: 355 afr 195 heads,tpis big mouth
Transmission: 700r-4 built by me 3-4 z pack
Axle/Gears: 3.42
Re: Leaky 700R4
Most of the time its the front pump bushing that's worn
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Car: 86 IROC-Z, 98 Z28
Engine: 370 LSx, LS1
Transmission: T56's
Axle/Gears: 3.73, 3.42
Re: Leaky 700R4
So might as well replace that too? Pretty straight forward as far as replacing it? Ordered up a new dipstick grommet, as well as a tv cable grommet. Might as well replace them while I have the trans out. Trans will be out Sunday.
#7
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Car: 1991 Pontiac Trans Am
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3:42
Re: Leaky 700R4
See if the pump retainer clip popped out of place that would allow the pump seal to blow out.
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#8
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Car: 86 IROC-Z, 98 Z28
Engine: 370 LSx, LS1
Transmission: T56's
Axle/Gears: 3.73, 3.42
Re: Leaky 700R4
Removing the transmission is allot easier when the top two bolts are missing. Guess the previous owner didn't think they were that important. Gonna clean it up and look at it tomorrow.
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Car: 86 IROC-Z, 98 Z28
Engine: 370 LSx, LS1
Transmission: T56's
Axle/Gears: 3.73, 3.42
Re: Leaky 700R4
Retainer clip and pump seal looked good. Inspected the front pump bushing and it looks trashed. Having it replaced tomorrow. Ive also got a new converter going in and was wondering if the gears moving around inside is normal? I'm wondering if the trans has been worked on before. Can anyone tell from these pics?
#11
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Re: Leaky 700R4
That silicone on the pump bolts is a sure sign that someone's been inside that transmission.
It's hard to tell from your photos, but it looks like the front half of your pump is fubar too. Are those areas of broken off chunks?
It's hard to tell from your photos, but it looks like the front half of your pump is fubar too. Are those areas of broken off chunks?
#12
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Re: Leaky 700R4
In IMG_8025, it looks like the pump drain back passage was enlarged. Doing this is in the instruction sheet for Trans-Go shift kits.
Staring at the photos for a while, I'd say at least the pump has been worked over. Perhaps someone has installed a shift kit at one time.
Staring at the photos for a while, I'd say at least the pump has been worked over. Perhaps someone has installed a shift kit at one time.
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Car: 1986 IROC-Z
Engine: 350
Transmission: T5
Axle/Gears: 4:10
Re: Leaky 700R4
in my old trans am I suffered from random 700r4 leaks. when i say random, i mean maybe once every 3-4 weeks when driving the car almost daily. turned out to be the dipstick grommet. changed that and all was well.
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