1996 differential fluid
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From: Oklahoma City OK
1996 differential fluid
I have noticed gear noise on my 1996 LT1. I put it up on the lift and tried to change the rear end fluid. The drain plug is cross threaded and no matter how hard I tried, It would not come loose. Any suggestions? 
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GM Limited Slip Additive
In '79 my (Special Edition) Trans Am (yeah, I know
gold pin striped and all ) had a VERY noisy clutch pack (rear end)....noticed whenever I turned a corner. GM dealer said: "Oh, you just need this lubricant additive to 'loosen up' the clutches...BUT it really isn't a problem, except for the noise". So I added it and fixed the noise.
Always thought I compromised the clutches, though.
gold pin striped and all ) had a VERY noisy clutch pack (rear end)....noticed whenever I turned a corner. GM dealer said: "Oh, you just need this lubricant additive to 'loosen up' the clutches...BUT it really isn't a problem, except for the noise". So I added it and fixed the noise.Always thought I compromised the clutches, though.
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From: SCMR Rat Pack'r Charter Member..Great Bend KS
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From this write-up:
The gear lubricant in the rear axle should be checked every 12 months or 15,000 miles (24,000km).
The rear axle should have the gear lubricant changed every 7,500 miles (12,000km).
What am I missing here?
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From: Fort Knox, KY
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But the rear Y-pipe and composite rear leaf spring are undeniably C4-esque.
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From: SCMR Rat Pack'r Charter Member..Great Bend KS
The interesting thing about the AutoZone instructions is that they credit that center bolt with being a drain plug.
The FSM makes no mention of any drain plug in the Danas.
Anyone ever pull this bolt to find out if AutoZone knows more than we know about this? (You will notice that the AutoZone picture taken after that bolt has been removed does not show any fluid running out of the hole...maybe this tells us something?)
Larry
code5coupe
Last edited by rocco16; Jan 23, 2007 at 09:53 AM.
Burning Brakes
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From: TN
C4 drain plug
A few years ago either Corvette Fever or Vette Magazine had an article on how to drill and tap a hole in the C4's differential housing to install a drain plug. As a result of the article, some C4's may have a drain plug. My 85 and 96 LT4 are still untouched, I use the ole siphon pump that I have always used on the 68 and 70.
Le Mans Master
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From: No Opti Here Tn
St. Jude Donor '06
I was going to use the pump when I decided to see if it would siphon out on its own
It did But very slowly
I ran the hose through the right rear wheel well and refilled it by just raising the hose and squeezing the gear lube bottle with the end stuck into the hose
Worked great
V-idiot you should just treat it as if it has no drain plug like it came from the factory
or you could get it on a lift and use a breaker bar to loosen it Then re-tap it and put in a new plug
It did But very slowly
I ran the hose through the right rear wheel well and refilled it by just raising the hose and squeezing the gear lube bottle with the end stuck into the hose
Worked great
V-idiot you should just treat it as if it has no drain plug like it came from the factory
or you could get it on a lift and use a breaker bar to loosen it Then re-tap it and put in a new plug
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Just like the picture shows, nothing came out. Dang, I guess it's back to the suction pump.
Cheers,
Lawrence
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From: Fort Knox, KY
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Use a Mity-Vac or one of those cheapie, hand-pumps at Harbor Freight Tools.
They even have one model in the J.C. Whitney catalog that attaches to a 1/4" electric drill and is excellent for transfering fluids like engine coolant, PS fluid or rear-diff oil.
They even have one model in the J.C. Whitney catalog that attaches to a 1/4" electric drill and is excellent for transfering fluids like engine coolant, PS fluid or rear-diff oil.
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From: SCMR Rat Pack'r Charter Member..Great Bend KS