Topic: THE TRUTH ABOUT TRANS. FLUID CHANGES
in Forum: C3 Engines, Driveline and Handling
Joel, I think the best thing is agree to disagree. Personally, I go along with what your saying. I've seen the switch to synthetics cause problems in older engines (leaks), and think the time to switch is at o/h. But if you start flippin burgers, next time I'm in the Lone Star, I'll be by for one.
Dave
ps, this one's in the wrong catagory
Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|
Joel, I think the best thing is agree to disagree. Personally, I go along with what your saying. I've seen the switch to synthetics cause problems in older engines (leaks), and think the time to switch is at o/h. But if you start flippin burgers, next time I'm in the Lone Star, I'll be by for one.
Dave
ps, this one's in the wrong catagory
[/QUOTE] I'm not planning on doing the engine,just the tranny.I already switched the rear end over with no leaks or any other probs.Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|
Synth can cause leaks. When the gaskets wear they can build up a bit of varnish/debris/dirt etc. This build up can actually help seal a worn gasket or old seal. The synth fluid does a better job cleaning, and flows better. If the seals/gaskets are worn, the synth can clean the stuff out, and the better flowing synth can then leak. If this is not the case, it won't leak. Crapshoot time. This is true of engines as well transmissions, and gear boxes and axles. As Clint Eastwood once said "Do you feel lucky?"

Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|

Go ahead and do it, then we will know for sure when you let us know what happens
Go ahead and do it, then we will know for sure when you let us know what happens
Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|
Although my Vette is a 4-speed, for the last 40k miles I always change the ATF wen I change the oil in my personal car (Olds Bravada).
At about the 80k mile mark, I realized that the oil had been changed about 20 times and the ATF never was. It didn't smell bad but it could use a change.
I dropped the pan, changed the tranny filter and I drilled a hole in the pan & installed a drain plug. The way I figure it, as I introduce more of the new ATF into the tranny @ each oil change, I'll end up with as close to a complete change as I can get. Hopefully this will extend the tranny's life, I'm pushing 140k now.

Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|