Probably be ok but my take on trans fluid changes is if its in good shape working fine it wont hurt it.
I'll probably go ahead and change it when it gets a little warmer and put in another tube. I thought it was completely cured, but it shuddered once or twice tonight, but it still wasn't as hard as before, so I'm thinking it's still better than it was.
true..I had a...TC shuddering...when I had it checked out they replaced a plug wire and that fix it... I have used the...trany fix stuff before... frank
I bought a set of new plugs, just never got around to installing them. Guy that was going to do it for me went out of business. After all the horror stories I've heard on the 4.6 mod motors and plugs and stripped threads, I don't want to tackle it myself. Rather let somebody that's had experience with them try their luck, and if they strip the threads, they can put in the heli coil, not me......
Be sure to use Mercon V when you service your AOD, AODE or 4R70W. Using the all synthetic fluid will prevent shudder. Note: Servicing a transmission will not hurt it. If the transmission fails after a service then it would have failed anyway. Servicing should be performed every two years or 20000 miles in most cases. Racing is hard on fluid and I would recommend a complete srvice after each day of racing whether it is one run or twenty.
Lucas oil makes this stuff too. It's labeled Lucas Transmission fix. Had a 95 E150 van (E4OD) that developed the same problem, poured the Lucas stuff in and the problem went away imediately. Picked up 2 mpg too. What's causing it is sticking solenoid valves in the transmission. They get gummed up with age, the Lucas stuff removes the gum and varnish and frees the valves. Tried it on a 40 year old, 60,000 mile C-6 too. Took 3 laps around the block before it cleaned it's valve body to get the shifting back to normal.
What does this solvent do to rubber and friction parts in the transmission over time? I ask because I have no idea and I have seen other products that are good at "fixing" one problem but over time they ruin other parts.
I've always used limited slip differintal additive for this problem it works great solves the problem every time. put it in my 95 f-150 tranny six years ago for this problem and haven't had a problem since. never flushed it either, just added to what was already in there which was original fluid, that was around 60,000 and now has 100,000
It doesn't do anything to the rubber or friction parts. When I added the Lucas stuff, the shudder problem went away for two years or better before resurfacing the day I sold the van. I added another quart then and never heard anything back on it from the buyer. That van was still being driven around last year. Before I added the Lucas stuff, my transmission guy said it needed a rebuild to fix the problem ($1500 worth. vs $10 for the bottle of Lucas) If you're a guy who rebuilds transmissions for a living, it's not going to help you. But if you don't, it's the best thing since sliced bread. I'm like most and don't have much faith in poured in quick fix products, but the Lucas stuff is an exception to that rule.
I use engine dynos so the transmission is not in the equation but If I were to have my car on a chassis dyno for more than a few runs then yes I would go ahead and service it. The dyno is not as hard on it as a full run at the drags though because you don't put the same load on it as you do at the drags. The dyno run is gradually increased, stabilized to collect information and then ramped up to the next point. If, like me, people determined the need of the service by the amount of time the transmission is under full load and acceleration and the temperatures reached as well as "normal" wear and tear they would probably service their transmissions a lot more often than they do.
Trans fluid starts breaking down and could be the cause of shudder. The additives in the oil wear out. Using synthetic can help slow down the breakdown. There are other possible causes for the shudder. Check out this article for more info on possible causes. http://tccoa.com/articles/tranny/transmission/page15.shtml R
The shudder I felt is more likely from the electrical solenoid controling the torque converter lockup feature. It feels exactly like driving on the rumble strip of the side of the road, only not felt thru the steering wheel.
