C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1994 torque converter change

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Old Sep 29, 2015 | 10:47 AM
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Default 1994 torque converter change

I've tried doing searches, but I can't find answers. I'm going to install an Edge 3000 stall converter to my 1994 LT1 while I have my exhaust off to install TPIS LT headers. I don't have a car lift, is this doable on jack stands? How high does the car have to be? My jack stands are 3T and only go to about 20" I can't measure the tranny height. Is a transmission lift necessary to lower tranny, or have any of you just modified a regular hydraulic car jack? I have never done a TC, plenty of manuals: clutch, pressure plate, etc. but I have no auto experience Any advice for this newbee is appreciated from those of you that have done this. THANKS!
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Old Sep 29, 2015 | 12:51 PM
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It can be done on jack stands. You need to get car high enough that you can move around. Not much different than doing clutch job. You will want to have a trans jack to raise and lower trans along with holding everything up attaching and removing "C" beam. You want to keep trans on jack when swapping converters. You will need to make sure converter is fully installed into transmission pump. there should be a gap between flywheel and converter when transmission and engine mate together. If converter binds against flywheel: pump can be damaged. You can expect it will be a little messy, it is unlikely you will be able to keep ATF off floor. Good Luck.
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Old Sep 29, 2015 | 01:17 PM
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Originally Posted by Kevova
It can be done on jack stands. You need to get car high enough that you can move around. Not much different than doing clutch job. You will want to have a trans jack to raise and lower trans along with holding everything up attaching and removing "C" beam. You want to keep trans on jack when swapping converters. You will need to make sure converter is fully installed into transmission pump. there should be a gap between flywheel and converter when transmission and engine mate together. If converter binds against flywheel: pump can be damaged. You can expect it will be a little messy, it is unlikely you will be able to keep ATF off floor. Good Luck.
Thanks. I've watched several videos, and read some DIY posts, just no one mentioned how high vehicle had to be. I'll borrow a transmission
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Old Sep 29, 2015 | 01:21 PM
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If you've got the exhaust removed you might consider maybe a "for hire" effort regarding the converter install. Might be a very wise expenditure when you take into consideration your equipment.

Having done clutches etc. you should be able to relate to the required additional effort. A local transmission shop maybe? If you catch one and it's maybe a little slow it could be very attractively priced. If you can see that they're slow maybe the price is negotiable.
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Old Sep 29, 2015 | 02:08 PM
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I've probably had my trannies out over a hundred times over the past 31 years. Jackstands will work just fine. For a converter swap, the tranny doesn't have to come out all the way. It just needs to slide back and downward a few inches. I use a floor jack with a small helper handle to lift the tranny (have not been able to find a replacement for my leaker). The tranny neads to go rearward about 18". Remove the old converter (pan underneath to catch the few ounces of fluid). Install the new one.
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Old Sep 29, 2015 | 03:27 PM
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Originally Posted by 383vett
I've probably had my trannies out over a hundred times over the past 31 years. Jackstands will work just fine. For a converter swap, the tranny doesn't have to come out all the way. It just needs to slide back and downward a few inches. I use a floor jack with a small helper handle to lift the tranny (have not been able to find a replacement for my leaker). The tranny neads to go rearward about 18". Remove the old converter (pan underneath to catch the few ounces of fluid). Install the new one.
I have removed \installed a few convertors also, all done on jack stands.
Get the car up high.

Disconnect the C Beam and lower the Tranny a bit using a piece of plywood and a jack.

Do not take the Tranny off the jack, swap the convertor, and then raise it back up.

4 hr job on jackstands.

Vic
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Old Sep 29, 2015 | 05:18 PM
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Originally Posted by Vic'89
I have removed \installed a few convertors also, all done on jack stands.
Get the car up high.

Disconnect the C Beam and lower the Tranny a bit using a piece of plywood and a jack.

Do not take the Tranny off the jack, swap the convertor, and then raise it back up.

4 hr job on jackstands.

Vic
I actually did this between 2 halves of a weekend race at the track. Raced on a Saturday and left the car at the track for the next day's race. Saturday night (or early Sunday morning) I decided to swap converters. Gathered up all the hand tools I would need and headed out to the track 2 hours before racetime on Sunday. Jacked the car up and set it on 4 jackstands. Start to finish I was able to accomplish this and still make the 9:00 race, exactly 2 hours with hand tools. Because it is a race car, I didn't have to deal with exhaust or a cbeam (I have a tranny mount). I have done this so many times, I knew exactly what tools I would need and didn't have to spend extra time getting up and down to retrieve tools like we always do. It was kind of fun doing a swap under race conditions. At home, taking my time, it would take me at least an hour more.
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Old Sep 29, 2015 | 09:22 PM
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Originally Posted by 383vett
I've probably had my trannies out over a hundred times over the past 31 years. Jackstands will work just fine. For a converter swap, the tranny doesn't have to come out all the way. It just needs to slide back and downward a few inches. I use a floor jack with a small helper handle to lift the tranny (have not been able to find a replacement for my leaker). The tranny neads to go rearward about 18". Remove the old converter (pan underneath to catch the few ounces of fluid). Install the new one.
That makes sense. I was thinking I had to pull tranny totally out from under vehicle. I think I can borrow a transmission lift. I'm going to go for it
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Old Sep 30, 2015 | 04:12 AM
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Originally Posted by mrodoc
That makes sense. I was thinking I had to pull tranny totally out from under vehicle. I think I can borrow a transmission lift. I'm going to go for it

I'd maybe confirm the bolt pattern and thread pitch is correct for the converter. It wouldn't be good to have it apart and find out the converter was mispackaged. New converter bolts? I'd think it maybe wise.
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