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

4+3 question?

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Old Apr 5, 2006 | 06:37 PM
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Default 4+3 question?

About to change the fluids in the 4+3. I think I am going with Synthetic fluids. How much fluid do the units take?


Thanks!
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Old Apr 5, 2006 | 06:55 PM
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MY FSM says 2 pints in the 4 speed and 4 pints in the overdrive.

RACE ON!!!
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Old Apr 5, 2006 | 08:09 PM
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Originally Posted by CFI-EFI
MY FSM says 2 pints in the 4 speed and 4 pints in the overdrive.

RACE ON!!!

10-4.

i am from canada. 1 pint=1 liter?
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Old Apr 5, 2006 | 08:59 PM
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You are probably too young too know about Imperial measures which we had prior to going to French measurements 25 years ago or so.
Complicating factor was Imperial measure was different from US system.
For example the Cdn gallon was 4.5 liters and US is 3.8 liters.
Anyway a US pint is a little less than a liter.
BTW all of this is available on something called the internet.
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Old Apr 5, 2006 | 10:21 PM
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Originally Posted by zoro
You are probably too young too know about Imperial measures which we had prior to going to French measurements 25 years ago or so.
Complicating factor was Imperial measure was different from US system.
For example the Cdn gallon was 4.5 liters and US is 3.8 liters.
Anyway a US pint is a little less than a liter.
BTW all of this is available on something called the internet.
Thank you Piere Elliott you jerk!!!!
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Old Apr 5, 2006 | 10:57 PM
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
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No, a US quart is very close to a Liter. A pint is 1/2 quart.

Did you purchase an overdrive filter yet? If not, go here:

http://forums.corvetteforum.com/show...erdrive+filter

In short, you need AC-Delco p/n TF184, or Fram FT1024
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Old Apr 6, 2006 | 08:14 AM
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Easy on that grommet and stuff when changing the OD filter. I had to get a little "animal" with mine, but no damage luckily.
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Old Apr 6, 2006 | 07:46 PM
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Originally Posted by 88BlackZ-51
10-4.

i am from canada. 1 pint=1 liter?
MY FSM says 1.0L in the 4 speed and 1.9L in the overdrive.

RACE ON!!!
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Old Apr 6, 2006 | 08:00 PM
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Make sure you can get the filler plug out of the gearbox before you drain it.
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Old Apr 6, 2006 | 10:45 PM
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Never mind the measurements. Level the car out and fill it up until it starts coming back out.
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Old Apr 18, 2006 | 06:27 PM
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thanks, i went with aimsoil stuff.
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Old Apr 18, 2006 | 09:34 PM
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Sorry if I'm hijacking this but I just changed my O/D filter and added topped it off with new fluid and now it has a monster leak after I test drove it. I can't tell where it is coming from because it looks like it is spraying out from above the O/D unit and leaking down. The pan is sealed fine. Can you overfill these??? is there an overflow?? Any ideas...thanks.
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Old Apr 18, 2006 | 11:51 PM
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Must be leaking out of the cooler line. Did you loosen any of those flare fittings? Did you remove the TV cable attachment?

It's hard to get a good seal on the pan too.
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Old Apr 19, 2006 | 08:32 AM
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Default 1988 corvette owner

i recently like thsi past weekend had my tranny flushed and filled ......in doing this does this change the fluid in the O/D unit? If not how hard is it to change?
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Old Apr 19, 2006 | 09:48 AM
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Thanks for the reply central, I'll look at the fitting. The only thing that I removed was the pan to change the filter and fluid. I talked to a tranny shop this morning and he thought I could have overfilled it and it is blowing out the top breather line or that the filter wasn't sealed properly (I did re-use the old hard grommet) and that it could be sucking air and foaming the fluid and blowing it overboard. Hopefully , I will get a chance to pull the pan and take a better look at it tonight.

Mid-Ohio is two days away and it looks like I will be having a couple all nighters to get this thing ready!! grrrr.
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Old Apr 19, 2006 | 09:49 AM
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Forgot to ask, TV cable attatchment??
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Old Apr 19, 2006 | 10:04 AM
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For you guys that need to do the metric/standard conversion I've been using this;

http://hemsidor.torget.se/users/b/bo...ert/conv_e.htm
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Old Apr 19, 2006 | 01:05 PM
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I change the fluid my OD every year. Just buy two quarts of Mobile 1 ATF and a hand pump to pump it from the bottle into the overdrive. You should use the correct size 8 point socket to remove the square plug. Also clean the gasket area and apply a good sealer. DO NOT over tighten the 10mm bolts that hold the pan on. Very easy job - just takes time.
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Old Apr 20, 2006 | 01:09 AM
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Originally Posted by mrc24x
Thanks for the reply central, I'll look at the fitting. The only thing that I removed was the pan to change the filter and fluid. I talked to a tranny shop this morning and he thought I could have overfilled it and it is blowing out the top breather line or that the filter wasn't sealed properly (I did re-use the old hard grommet) and that it could be sucking air and foaming the fluid and blowing it overboard. Hopefully , I will get a chance to pull the pan and take a better look at it tonight.

Mid-Ohio is two days away and it looks like I will be having a couple all nighters to get this thing ready!! grrrr.
If it was sucking air, the overdrive wouldn't engage. There's no way it'd make it to the vent, the vent should have a metal tube going up to the engine compartment, even if that's not there, there's a little elbow on top of the OD. And it can't be overfilled unless you got real creative. I don't have an answer.
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Old Apr 20, 2006 | 02:03 AM
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Originally Posted by mrc24x
Forgot to ask, TV cable attatchment??
A cable that runs from the tranny to the throttle. Your 88 doesn't have one. Only on the 84 and 85 modle years I believe. My 85 has an 87 tranny in it so it doesn't use the TV cable.
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