Looking for game plan to extend life of original 384,000 mile 700R4
#1
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Looking for game plan to extend life of original 384,000 mile 700R4
Yes, really. I want to squeeze 400,000 miles out of the original transmission that's never had a rebuild etc. Finally clear of a 5 hour traffic jam in the middle of a 600 mile road trip, the transmission slipped some when hitting 75 mph. I pulled over sat for a few minutes restarted drove to the nearest exit had dinner and let the car fully cool off for an hour and a half. Transmission was fine for the rest of the trip.
Max temperature was about 235 degrees.
The Mobile 1 ATF has 7,000 miles on it & fresh filter
I'm not interested in having the 700 rebuilt.
I'm thinking at least pull the pan dump the fluid and fresh Mobile 1 ATF & new filter. What else can I do?
Cost isn't an issue being stubborn and seeing the odometer roll 400,000+ miles is what I interested in.
Side note: Counted 24+ disabled vehicles in the traffic jams pulled off to the side of interstate. Most had cooling issues. Many were less than 7 years old. About half of the disabled vehicles were Chrysler/Dodge/AMC products another third were Mitsubishi products. Otherwise no patterns.
Thank you in advance or you input.
Max temperature was about 235 degrees.
The Mobile 1 ATF has 7,000 miles on it & fresh filter
I'm not interested in having the 700 rebuilt.
I'm thinking at least pull the pan dump the fluid and fresh Mobile 1 ATF & new filter. What else can I do?
Cost isn't an issue being stubborn and seeing the odometer roll 400,000+ miles is what I interested in.
Side note: Counted 24+ disabled vehicles in the traffic jams pulled off to the side of interstate. Most had cooling issues. Many were less than 7 years old. About half of the disabled vehicles were Chrysler/Dodge/AMC products another third were Mitsubishi products. Otherwise no patterns.
Thank you in advance or you input.
#4
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Car: 1989 camaro rs convertable
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: 7.5"3.42 gears forth gen 2000 camar
Re: Looking for game plan to extend life of original 384,000 mile 700R4
the biggest aftermarket trans cooler you can find and stop driving over 72.
#5
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Thread Starter
Re: Looking for game plan to extend life of original 384,000 mile 700R4
Too funny...didn't think about jackstands & a brick
Trans - cooler is an excellent idea.
Also think adding an in line magnefine filter, bottle of Red Lube Guard, deep pan & pick up maybe part of the plan.
I'm not sure I could drive under 75...that would be torture.
Trans - cooler is an excellent idea.
Also think adding an in line magnefine filter, bottle of Red Lube Guard, deep pan & pick up maybe part of the plan.
I'm not sure I could drive under 75...that would be torture.
#7
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Thread Starter
Re: Looking for game plan to extend life of original 384,000 mile 700R4
Yes, maybe I should swap back to a 160 stat. The ERG valve carbons fast on my rs with 160 stat.
Car has a 180 thermostat (no - stick type). When water was replaced two years ago briefly had a stock 195 but that was too hot. Cooling system is in good shape with all of the following replaced in last two years: radiator, fan motor, hoses, heater core and fresh coolant. Head gaskets are good passed the chemical exhaust gas test twice.
These is a small coolant leak on the intake manifold has been there for 7+ years.
Sitting at idle stayed under 220 for 4 hours...then started to creep upward to 235.
Outside temp was 87 per my smartphone but in the sun on the interstate idling in traffic I think it was closer to 95 or so...felt that way.
Car has a 180 thermostat (no - stick type). When water was replaced two years ago briefly had a stock 195 but that was too hot. Cooling system is in good shape with all of the following replaced in last two years: radiator, fan motor, hoses, heater core and fresh coolant. Head gaskets are good passed the chemical exhaust gas test twice.
These is a small coolant leak on the intake manifold has been there for 7+ years.
Sitting at idle stayed under 220 for 4 hours...then started to creep upward to 235.
Outside temp was 87 per my smartphone but in the sun on the interstate idling in traffic I think it was closer to 95 or so...felt that way.
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#8
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Car: 1988 Firebird, 2000 GTP
Engine: 327
Transmission: 700R4
Axle/Gears: 9" posi, 4.11
Re: Looking for game plan to extend life of original 384,000 mile 700R4
A few years ago I rebuilt a 4l60e with over 300k miles on it. Its demise was a couple shift accumulator pistons wearing out. While you have the pan dropped for a fluid change you could check these if you want to. It's pretty early so I can't remember if the valvebody needs to be dropped or not.
The pistons are only a few $ each if you want to make sure they are in good shape.
The pistons are only a few $ each if you want to make sure they are in good shape.
#10
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Re: Looking for game plan to extend life of original 384,000 mile 700R4
I would add the Corvette servo to start with as this will improve the 3-4 clutch life, and firm up the 1-2 shift a little and depending on how much you want to spend, there are other things that can be done.
#11
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Car: 1992 Chevrolet Camaro Z28
Engine: 5.7 TPI
Transmission: 700R4 Overdrive Automatic
Axle/Gears: 3.23:1 Positraction
Re: Looking for game plan to extend life of original 384,000 mile 700R4
When you shift it, be gentle with it, think of the shifter as a loaded gun with the safety off whenever you pull it down from park, nice smooth crisp shifts, no quick yanking back and forth of the shifter into gear. And keep it under 65 in OD, no burnouts, no hard accelerations. No 360s. No 180s.
but yeah, lifting it on jack stands is kinda cheating
Here in L.A. since we don't have mile long roads from street corner to street corner and since there's A stop light every 100 yards, you can drive it around the block as many times as you want to on weekends slowly just to accumulate mileage gently over time. Wait till the the neighborhood kids are out playing and give them a thrill hearing the car's loud exhaust just idle by a couple hundred times. Lol
but yeah, lifting it on jack stands is kinda cheating
Here in L.A. since we don't have mile long roads from street corner to street corner and since there's A stop light every 100 yards, you can drive it around the block as many times as you want to on weekends slowly just to accumulate mileage gently over time. Wait till the the neighborhood kids are out playing and give them a thrill hearing the car's loud exhaust just idle by a couple hundred times. Lol
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