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

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Old Sep 28, 2017 | 01:48 AM
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so I lost 3-OD in my 95 which seems to be a typical problem with these trannys............I believe its a 4L60E . I could have it rebuilt but am thinking about just getting a rebuilt unit and having it installed in one painless shot and not messing with the existing one.. have done some research and total cost will also be lower in general. just believe me, it will!

Question is for you tranny experts here is their a certain model/type or is it just refered to as a 4L60E and is their anything I need to look for when buying one ??

Last edited by lectroglide; Sep 28, 2017 at 01:50 AM.
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Old Sep 28, 2017 | 03:00 AM
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Tailshaft is Corvette only due to the way the driveline mounts with the C-beam.
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Old Sep 28, 2017 | 12:20 PM
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Do watch out for this; with many rebuilt transmissions if you do not purchase a new TC from the rebuild shop they will give you no warranty on the rebuilt transmission. Read the fine print on the web sites.
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Old Sep 28, 2017 | 12:27 PM
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On my 91, the output shaft was different length. Longer, IIRC.
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Old Sep 28, 2017 | 04:37 PM
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If it is coming from a non Corvette application, cut 5/8" off the output shaft and bolt on the Corvette tailshaft.
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Old Sep 28, 2017 | 05:46 PM
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Originally Posted by 383vett
If it is coming from a non Corvette application, cut 5/8" off the output shaft and bolt on the Corvette tailshaft.
Wouldn't you have to disassemble the transmission to properly cut it?
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Old Sep 28, 2017 | 06:40 PM
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If the GM Assembly was still available from the dealer I'd be very tempted to do a GM reman. The GM reman has 3/36 & 100,000 and isn't required to be installed at the dealer. The warranty disclaimer is a little vague but I know several that have purchased the GM product with "no issues" and I know one fellow that had an issue and it was just removed and another to replace it.

You need to have a conversation with the dealer you're interested in buying from but I'd be very tempted if the car was a "keeper"!!

I believe this is still current GM Warranty document - you might want to check for current documents and of course - Is it still available?

https://www.chevrolet.com/content/da...ranty-card.pdf

A reliable independent builder? I wouldn't have a problem with that after a conversation.

I know a shop that if they have an exploded unit will actually use the GM product.
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Old Sep 28, 2017 | 06:45 PM
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GM reman is OK if you are going to keep it stock and not beat on it aka "Granny" the trans.
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Old Sep 28, 2017 | 10:10 PM
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Get yours rebuilt and upgraded.
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Old Sep 28, 2017 | 11:27 PM
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Originally Posted by aklim
Wouldn't you have to disassemble the transmission to properly cut it?
A rag around the output shaft and a cutoff wheel worked for me.
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Old Sep 29, 2017 | 09:23 PM
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Originally Posted by confab
Get yours rebuilt and upgraded.

^^ this.
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Old Sep 29, 2017 | 09:42 PM
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Originally Posted by confab
Get yours rebuilt and upgraded.
I'd say this only applies if you know the shop/builder or they offer up a very good warranty. The shop will need to disassemble to actually confirm the issues and mention what they'll ''upgrade" during the build. I know a couple I'd trust but I'd certainly have a conversation with them explaining what they'll actually do and with what parts! If there's a GM unit available their build would have to be substantially LESS money and a warranty that was for more than "out the driveway/over the curb"

I'd say it's very easy to end up on the "short end of this type a deal".

OP ain't been back. It might be interesting to see if he's had conversations and maybe already made a decision.
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Old Sep 30, 2017 | 04:35 AM
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Pretty sure we could beat GM on the price here. Quality is a definite yes and the warranty is comparable. (They're does by a third party, anyway.)

Any trans shop that knows what they're doing should be able to do the same, but I keep hearing these horror stories so, maybe not?
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Old Oct 28, 2017 | 01:18 PM
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Originally Posted by lectroglide
so I lost 3-OD in my 95 which seems to be a typical problem with these trannys............I believe its a 4L60E . I could have it rebuilt but am thinking about just getting a rebuilt unit and having it installed in one painless shot and not messing with the existing one.. have done some research and total cost will also be lower in general. just believe me, it will!

Question is for you tranny experts here is their a certain model/type or is it just refered to as a 4L60E and is their anything I need to look for when buying one ??
So, could you come back and tell all of us how you resolved the tranny issues?
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Old Oct 28, 2017 | 03:15 PM
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ok guys wound up having it rebuilt ata local tranny shop with a 3 yr 50K mile guarantee parts/labor I called around for to get different prices and they were all in the $2500 range
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