700R4 Life span relative to fluid temperatures

[Rayzor32]

Change the fluid 7000 miles?? what are you nuts?? I dont even think the minimum is 25000 miles, if it smells burnt or is dirty then change it, or else its fine. And the fluid does matter, you ever try trick shift, works great, you can definetly feel the difference.

This ad is not displayed to registered members. Register your free account today and become a member on ThirdGen!

[83 Crossfire TA]

150* is probably right around borderline, it's probably enough to get the tranny to operate correctly, but not enough to effectively evaporate off the condensation that forms inside the transmission when it cools off.

I suspect that that or slightly higher is around where my transmission runs in my truck most of the time since I added an external cooler, still routing the return line through the stock cooler in the radiator to pick up some heat there, and since then I haven't had the same problems with heat destroying my tranny fluid (It used to get so bad that it wouldn’t shift right, or at least feel the change in shifts after about 3-5000miles of use if I did any towing), but lately I’ve been having a problem with the dipstick rusting in the tube…

[Apeiron]

Originally Posted by Rayzor32

you ever try trick shift, works great, you can definetly feel the difference.

Do you know why you can feel a difference with Trick Shift?

[83 Crossfire TA]

All trick shift is is ford type F with blue dye in it.

I’m not sure that it’s something that I would do to a new or any transmission that I intend to keep for a while, but I have done it to get an extra few thousand miles out of a tranny that was dying, but then I would just use cheap type F rather than expensive trick shift.

[nelapse]

Originally Posted by 83 Crossfire TA

150* is probably right around borderline, it's probably enough to get the tranny to operate correctly, but not enough to effectively evaporate off the condensation that forms inside the transmission when it cools off.

I suspect that that or slightly higher is around where my transmission runs in my truck most of the time since I added an external cooler, still routing the return line through the stock cooler in the radiator to pick up some heat there, and since then I haven't had the same problems with heat destroying my tranny fluid (It used to get so bad that it wouldn’t shift right, or at least feel the change in shifts after about 3-5000miles of use if I did any towing), but lately I’ve been having a problem with the dipstick rusting in the tube…

I guess I will stick with my current setup. If I go balls to the wall it will go 175* maybe. My external cooler is hardcore.

You should get a lokar dipstick assembly. Nice tube and a non metal dipstick.

[83 Crossfire TA]

that doesn't solve the prolem, there would still be water sitting inside the transmission not evaporating off...

[nelapse]

This is the first I have heard of it. I would like to see some evidence that running 150* WILL hurt my transmission. Not that I do not believe you, but this is the first I have heard of it. I am not willing to get rid of an expensive cooler because of one persons opinion. (No offensive to you).

[83 Crossfire TA]

Well, there’s a big difference between fact and opinion, and if you pay attention to what I bother posting about you’ll see that I don’t tend to waste people’s times with opinions unless I state that’s what they are. I tend to be very straight forward with my responses.

That said. Water plus any petroleum based lubricant that gets pumped stirred around is not a good thing. Pick any oil in your garage, mix it with some water and whip it up and see what happens (replace the petroleum oil with vegetable oil and you get an edible version of the same stuff, mayo, try pump that through a set of bearings, or see how fast an significant water will wipe out bearings. Second, what makes automatic transmissions more susceptible is that they use paper clutches, which are fine in oil, but fall apart when in contact with water. Water will wipe out an automatic transmission faster then filling the oil with grit and poking holes in the filter to let it get pumped around.

[nelapse]

Originally Posted by 83 Crossfire TA

Well, there’s a big difference between fact and opinion, and if you pay attention to what I bother posting about you’ll see that I don’t tend to waste people’s times with opinions unless I state that’s what they are. I tend to be very straight forward with my responses.

That said. Water plus any petroleum based lubricant that gets pumped stirred around is not a good thing. Pick any oil in your garage, mix it with some water and whip it up and see what happens (replace the petroleum oil with vegetable oil and you get an edible version of the same stuff, mayo, try pump that through a set of bearings, or see how fast an significant water will wipe out bearings. Second, what makes automatic transmissions more susceptible is that they use paper clutches, which are fine in oil, but fall apart when in contact with water. Water will wipe out an automatic transmission faster then filling the oil with grit and poking holes in the filter to let it get pumped around.

There is a HUGE difference between pouring water in oil and some condensation.

[DENN_SHAH]

the condensation adds up over time if it doesn't get hot enough for long enough to burn the water off.
if your getting to 150 & keeping it there for half an hour or longer, your probably fine.

[firebird904]

my 700r4 had 160,000 and was shifting great and then i did an engine swap and my father decided he would drop the engine in for me and broke the bell housing

[Toyota h8r]

any idea why my 91 700r4 had 2nd gear one day and next go out for work and no 2nd gear.

just completely missing

[kevinjlewis]

By and large, I believe in buying cheap and changing often is the best preventative maintenance. However, I feel motor oil is the only exception. I get mobile one full syn. at wal-mart for $22.00, You can get a decent oil filter here on the cheap also. Anyway, I just wanted to hear your thought on synthetic motor oil, all things aside-

[RMK]

In the socialist UK mobil1 costs $75 for 4 litres.

[ericjon262]

Originally Posted by thirdgenrs

my 700r4 in my 90 camaro rs has 180,000 on it and has just started to slip when i get on it. I dont change my fluid every 7000 i just make sure it has some in it. guess its one of those 1 in a million tranmissions.

3 in a million, my car has 160000 miles, factory trans, no fluid change ever, my 86 K5 blazer was the same way 165000, no changes, no slips.

oh, and I'm not easy on it either!

[jm84z28]

Originally Posted by ericjon262

3 in a million, my car has 160000 miles, factory trans, no fluid change ever, my 86 K5 blazer was the same way 165000, no changes, no slips.

oh, and I'm not easy on it either!

haha good old chevy trans for u lmao

[jimdutro]

My `88 Iroc also has the original 700r4 with 160k miles. I have never had any auto trans problems in any GM car I`ve owned the past 43 years if I use a trans cooler and deep pan. I also service the trans every year, cheap insurance.

[ericjon262]

I guess they don't last forever though,(shoulda knocked on wood), mine started slipping earlier this week.

[JTNKTZ]

130k miles on mine then it started to slip then one day I lost 3-4th pack completely. Switched to another used tranny (100k miles) and it's slippin a little. Starting to buy parts for my T56 lol.