dumb tranny question
#1
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Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
dumb tranny question
Hi Guys,
I did a search but couldn't find an answer...
I had a company rebuild a 700r4 for me a few years back. Once I received it, the transmission sat on the garage floor for a few months.
When I was installing the transmission, I noticed the pump shaft seemed a bit off-center. However, I'm not a guru on these things so I foolishly assumed it was ok and continued with the install. However, now that the car is running, I have a leak from what appears to be the front pump seal area! Would the pump shaft being a little off-center cause this? Any other ideas? I hate the thought of pulling that transmission out again
Any advice would be greatly appreciated!
Thanks!
I did a search but couldn't find an answer...
I had a company rebuild a 700r4 for me a few years back. Once I received it, the transmission sat on the garage floor for a few months.
When I was installing the transmission, I noticed the pump shaft seemed a bit off-center. However, I'm not a guru on these things so I foolishly assumed it was ok and continued with the install. However, now that the car is running, I have a leak from what appears to be the front pump seal area! Would the pump shaft being a little off-center cause this? Any other ideas? I hate the thought of pulling that transmission out again
Any advice would be greatly appreciated!
Thanks!
#2
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Car: 1990 Formula Firebird
Engine: 305 TBI (LO3)
Transmission: WC T-5 out of an 88 T/A
Axle/Gears: 10 bolt, 3.42 & Torsen Posi
Re: dumb tranny question
Any misalignment of a shaft will cause it to eat seals like a fat kid eats Twinkies. If you're front seal is leaking only option is to remove the trans for further diagnosis.
#3
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Car: 86 Camaro
Engine: 355- hopefully a 5.3 this summer
Transmission: 700r4
Axle/Gears: 3.42
Re: dumb tranny question
the input shaft really has no real support at the front until you put the torque converter on it, which itself pilots off the bushing in the pump.
how far off center was it?
how far off center was it?
#4
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Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
Re: dumb tranny question
LOL
I honestly don't remember how far off it was but it was enough that I noticed it
If I pull the tranny, is aligning it as simple as unbolting the pump (I think there were 2 bolts) and centering it with the seal?
If I pull the tranny, is aligning it as simple as unbolting the pump (I think there were 2 bolts) and centering it with the seal?
#5
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Re: dumb tranny question
If you want a good view of all the parts , have a look at the top of the page at my "pictures of every component of a 700R4" thread ...
#6
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Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
Re: dumb tranny question
Thanks for the reply OrangeBird!
If there are 7 bolts holding the pump on, I don't understand how it could be off-centered?
Any thoughts?
If there are 7 bolts holding the pump on, I don't understand how it could be off-centered?
Any thoughts?
#7
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Re: dumb tranny question
When you look at it with the torque converter removed , you see the fatter outer shaft that is the biggest part that fits into the torque converter , and inside that you see a smaller shaft , which is actually the input shaft (the big outer one doesn't turn , only the inner one does) . If the outer one is crooked , either it's not mounted correctly to the pump (kinda unlikely) or the pump is not seated correctly into the transmission case (highly likely if the rebuilder was having a bad day) .
Either way , and I know just how bad it sucks , the transmission will of course have to come out to find out exactly whats up . When you do remove it , take a bunch of pictures so we can see what it looks like in there .
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Car: 1989 Firebird Formula
Engine: 383 Stealth Ram
Transmission: 700R4
Axle/Gears: 3.73 9 bolt Posi
Re: dumb tranny question
It's been a while but I believe it was the larger, outer shaft that was off-centered.
I will pull the transmission, take some pics and go from there.
Thanks to everyone for the help!
I will pull the transmission, take some pics and go from there.
Thanks to everyone for the help!
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