[Garrett Ross]

I was looking through the topics and didnt find this one so I'm going to post it and get help. To start off I'll go with the easy one, i was reading on some other sites that doing a tranny flush if the tranny never has been flushed can destroy the transmission. Because of the gears being used to running on dirty fluid that putting clean fluid on it will throw it off. How true is this? And does this apply for automatic and standard trannys? And what fluids do both take after flush? For the second part of the topic is the pros and cons to having a hydraulic clutch release compared to a mechanical clutch release?

[djfirebird93]

Well, that is true in the statement that if it hasn't been flushed before, then don't. There is sediment that will build up on the clutch bands that is taken out when the fluid is changed. They make fluid for high mileage transmissions that try and make up for this, but they typically don't work too well. So, I wouldn't do it if it hasn't ever been flushed and you have over 100k miles on it. No, it doesn't apply to manual transmissions, just automatics. Manual transmissions are using actual gears, rather than pumps and valves, and planetary gears, and the fluid doesn't build pressure, nor get as hot as automatics. Automatics usually get Dexron III or manufacturer specific fluid, but typically, Dexron III ATF is used. Some manual transmissions use ATF fluid as well, but most manual transmissions used a thicker gear oil, something like 75w90 (I know this is used on GM rearends, but I couldn't think of an accurate weight). I'm not too sure about the clutch differences. Hydrolic clutches are easier, and move faster, but the mechanical clutch has a better feel to it. I like both.

[305 Formula]

djfirebird93, on 06 February 2012 - 05:39 PM, said:

Well, that is true in the statement that if it hasn't been flushed before, then don't. There is sediment that will build up on the clutch bands that is taken out when the fluid is changed. They make fluid for high mileage transmissions that try and make up for this, but they typically don't work too well. So, I wouldn't do it if it hasn't ever been flushed and you have over 100k miles on it. No, it doesn't apply to manual transmissions, just automatics. Manual transmissions are using actual gears, rather than pumps and valves, and planetary gears, and the fluid doesn't build pressure, nor get as hot as automatics. Automatics usually get Dexron III or manufacturer specific fluid, but typically, Dexron III ATF is used. Some manual transmissions use ATF fluid as well, but most manual transmissions used a thicker gear oil, something like 75w90 (I know this is used on GM rearends, but I couldn't think of an accurate weight). I'm not too sure about the clutch differences. Hydrolic clutches are easier, and move faster, but the mechanical clutch has a better feel to it. I like both.

Thats an urban myth, some people say don't do it because the debris gets disloged and then your tranny dies, some people have done it on high mileage trannys and have had no problems for many miles. Either way, that just goes for A/Ts, since you have a M/T you don't have to worry about flushing the system and blowing shit up. I would just put fresh fluid in your tranny, T-5s take dextron 3 ATF.

[Garrett Ross]

Well as you guys have seen this car hadn't been taken care of and im just tying to tune it up. So which is the best to use for my manual tranny gear oil or dextron 3 ATF fluid? And how much do I fill it up? I've seen that you feel it up enough to stick your pinky in the hole and feel the liquid on the edge. But is there and easier way?

[djfirebird93]

Garrett Ross, on 06 February 2012 - 07:37 PM, said:

Well as you guys have seen this car hadn't been taken care of and im just tying to tune it up. So which is the best to use for my manual tranny gear oil or dextron 3 ATF fluid? And how much do I fill it up? I've seen that you feel it up enough to stick your pinky in the hole and feel the liquid on the edge. But is there and easier way?

The ATF is what it calls for, i'm pretty sure. Check your owner's manual to be sure. But the only way to add it is that hole, unfortunately. You can buy a fluid pump at autozone for cheap. http://www.autozone....omString=search

[Garrett Ross]

I'll have to give it a shot and let you guys know what happens

[Jaysz28]

You have a manual trans...... not really an issue for you. Most of what you have read is in regards to auto transmissions....  lol

So if you get that new trans, drain the fluid, install it, fill it with 4 quarts of ATF and enjoy!

[Garrett Ross]

Ok so 4 quarts of ATF fluid, i was wondering about that. And after draining the old transmission fluid it all came out black with some black dirt in the bottom of it. So i flushed it with some new fluid and filled it wiht about 3/4 of a quart of fluid so ill go ahead and fill it more tomorrow.

[96TA]

My 6 speed took about 4 qts, and the ATF3 came out like water. I say fill it till it starts coming back out and then put the plug back in. I used the top to a Lucas bottle and a 5/16 fuel hose since that hose fit right in the fill hole, then squeezed till the bottle was empty.

As far as the flush question, autos that do not get flushed then to get build up of debris (like mentiond above) but usually what happens is the debris that is fine where it is get moved during the flush and can land in a bad place which will cause you problems. I say if is neglected then save your money and add to it untill you get enough for another/rebuilt tranny.

[Garrett Ross]

75TA, on 08 February 2012 - 08:34 PM, said:

My 6 speed took about 4 qts, and the ATF3 came out like water. I say fill it till it starts coming back out and then put the plug back in. I used the top to a Lucas bottle and a 5/16 fuel hose since that hose fit right in the fill hole, then squeezed till the bottle was empty.

As far as the flush question, autos that do not get flushed then to get build up of debris (like mentiond above) but usually what happens is the debris that is fine where it is get moved during the flush and can land in a bad place which will cause you problems. I say if is neglected then save your money and add to it untill you get enough for another/rebuilt tranny.

What is a good flush period? When you have to replace the clutch? or every 20-50 thousand miles?

[96TA]

On the 5 or 6 speed trannies its just called a "drain and fill" because it is just that. A repair shop may charge $69 - $89 for this service. But it is real simple to do and should be done about every 30K in my opinion since it is just regular trans fluid, if it took gear oil (which it does not) then I would do it every 60K like the rear differential. As far as a good flush for your car, there is "no good flush", it is as good as drain and fill. If you wanted to do a real good cleaning, then do it once a week for about 3 weeks or untill the fluid looks as clean as it went in when it came out, it must be driven in between each drain to let the fluid clean all the parts. The drain plug is at the bottom of the tranny case so little to no fluid is left when you drain it. Once will be fine in my opinion and mabe again in 10K miles if the fluid is real dirty.