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2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Transmission fluid change question

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Old 07-07-2011, 09:48 AM
i mow grass i mow grass is offline
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Default Transmission fluid change question

I know this will probably open a can of worms up, but I just want to get a third opinion from y'all. So I recently bought the truck a couple months ago, it has 1495xx miles on it. It does shift a little rough, my question is should I change the tranny fluid/filter? I don't know if the previous owner has done any maintenance on it. I am hearing and reading different things from people, some say don't mess with it you will only get problems, others say do it and it will shift smoother/last longer... I am confused as hell on what I should do; any input will be greatly appreciated.
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Old 07-07-2011, 09:50 AM
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Doing a fluid/filter change is actually a good idea. While you are in there, it probably wouldn't hurt to adjust the bands either. A trans FLUSH is what most folks consider a 'bad' idea, on a trans that you don't know how well maintained it was.
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Old 07-07-2011, 10:08 AM
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Thanks for the quick response, yeah I was actually just looking at the band adjustment procedure in the service manual and looks really easy if you have a decent torque wrench/tools. One thing I didn't notice in the manual is what to torque the tranny pan bolts to upon reinstalling the pan.
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Old 07-07-2011, 10:11 AM
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I just run 'em in nice and snug. I have never used a torque wrench on them.
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Old 07-07-2011, 10:19 AM
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Thanks sounds good to me. Have any other tips for me before I do this? Seems like it is going to be an easy straight forward job.
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Old 07-07-2011, 11:07 AM
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Pan bolts= 13 foot pounds Retorque in a couple days

Might not be a bad idea to remove the gov. solenoid and spray it down.
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Old 07-07-2011, 11:16 AM
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If you haven't done this trick before..... be VERY careful how you take the bolts out. There is a LOT of fluid in there, and it likes to come out ALL AT ONCE.
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Old 07-07-2011, 11:20 AM
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+1 ... And one other thing. We both dropped the ball on, suggesting one of these!



Click the image to open in full size.
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Old 07-07-2011, 12:49 PM
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Yes, just had my tranny rebuilt some, shift kit, etc... And a drain plug welded in. It'll make changing fluid along with reg oil changes easy.
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Old 07-07-2011, 01:30 PM
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Quote:
A trans FLUSH is what most folks consider a 'bad' idea, on a trans that you don't knowhow well maintained it was.
Explain.
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Old 07-07-2011, 01:45 PM
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Quote:
Originally Posted by PurplDodge View Post
Explain.
Come on now! You should know the argument about this topic by now.
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Old 07-07-2011, 02:17 PM
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Quote:
Originally Posted by zman17 View Post
Come on now! You should know the argument about this topic by now.
Aww come on...One more time.
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Old 07-07-2011, 09:37 PM
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The pieces of crud that have built up in the trans MAY be all thats holding certain things in place properly... flushing removes those, and thus causes problems...In a tranny thats been well maintained and flushed regularly, doing a flush is no problem, because there are no "Pieces of crud"..... In a poorly, or unknownly well maintained tranny....it can be an issue........I believe that's the argument.
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Old 07-07-2011, 10:37 PM
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Flushing is generally running some kind of solvent, or, high detergent trans fluid backwards thru the trans. That gets the dirt broke loose all right, but, it does NOT get it all out of the trans. A fair bit accumulates on the WRONG side of the filter, so, the first time you start it up, and put it in gear, all that crap gets run right back into the trans. All at once..... Tends to foul close-tolerance parts, like the valves in the valve body, and clog small passages. Basically, the trans stops working right.

There is another style of 'flush', that splices into the trans cooler lines, and simply replaces fluid at the same rate the trans pushes it out. NOT recirculating the old stuff. This type of flush is hideously expensive, as it uses a LOT of trans fluid. It has the advantage of anything that it does happen to break loose, is pumped out of the trans in the correct direction of flow. These types of machines aren't real common though, as this style of service is significantly more expensive than the other style.....
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Old 07-07-2011, 11:20 PM
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im going to agree with HeyYou right up to the point where he says that the mechines are not used and expencive. yeah 100 bucks to run the tranny frush is a bit high. that out cost to run the flush which is powered off the trans pump does not force fluid into the valve body or threw the tranny. also we normally do whats known as a two filter flush thus why there 100 bucks. we replace the first filter with a vert fine filter to catch sedilment from the flush. then we flush the trans and then we replace the filter with a stock one. most shops dont like to waste the time to do it right so the flush with the dirty filter and think they helped by changed bad fluid to good. also as much as everyone argues that new fluid makes it not move BULL FING $hit. the trans came with clean not dirty fluid that worked just fine shifted and everything. its goon do it again with the same clean fluid. also i would recommend MAXLIFE trans fluid it capadable with 90% of trans and dealers and makers also had added sulavents so brake down slug and grime and also to help bands from streching and swelling.
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Old 07-08-2011, 12:59 AM
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When the trans came new from the factory, all the parts in it were new too..... after 100K miles, they aren't new anymore. Doing a flush IMPROPERLY is highly likely to kill the trans. Doing it the right way has a chance of killing it as well. At the dealership I worked at, we warned folks with high mileage automatics that it was a possibility. At the independent shop I worked at, we simply would not do a flush. Fluid and filter, sure.
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Old 07-08-2011, 10:50 PM
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I still cant grasp that removing all the fluid from the trans and replacing it with new will kill it.
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Old 07-09-2011, 07:11 AM
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From what I understand Its not just replacing the fluid. In a flush they are running solvents through it to break up all the crap in there. It seems that not all of the crap gets out with the flush and some is left behind. Now once you run trans all the left over crap gets lodged into places it shouldn't be (like the valve body) and the trans can no longer work like it should.
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Old 07-09-2011, 07:11 AM
 
 
 
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