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My 4l80e started feeling like the brakes were being applied.i pressed the gas on down it would accelarate fine. seemed to get hot. fluid leak caused fire on exaust from rear trans line at case.when i started the engine to check were the leak is at then shifted in gear and nothing happend!!tried to reve the motor it would barely reveup in prnod123 what could the problem be.it was almost full of fluid. 98gmc 3500 4.7 4x4

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6ya6ya
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Posted on Jan 02, 2017

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michigan man
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SOURCE: 1995 chevy 1500 4x4 pickup 4L60E trans

here is a place to call that sells only GM parts and they will also let you know what will fit your truck Schram auto and truck parts 1-800-292-1032

Posted on Feb 21, 2009

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  • 158 Answers

SOURCE: i want to swap a 700r-4 to a 4l80e.

Well, you will need the computer that controls the 4L80E because it is shifted electronically as the 700 is not - it is hydraulic. I think if you have both trucks, you swap wiring harnesses and such and it would work out.

Or you could buy a module just for working the trans but I think they are expensive.

Posted on Apr 06, 2009

  • 159 Answers

SOURCE: 4L80E Diesel Transmission Replacement

the gas tranny should work. gm was pretty good about keeping the same bolt pattern.

Posted on Jun 04, 2009

heavymetal77
  • 721 Answers

SOURCE: 4L80E trans. Lost passing gear/overdrive suddenly

Unfortunately,the transmission is probably bad.

Posted on Jul 15, 2009

  • 76 Answers

SOURCE: Will a 1994 chevy 4l80e 4wd swap into a 1995 GMC

with a little tooling around im sure itll fit ,you might have to change the tail to trans case then again its a chevy so bolt it in

Posted on Aug 19, 2009

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1 Answer

Run fines when cool but after engine heats brakes tighten and motor becomes to forcefull till it doesnt move anymore, after coll run fine back again till you know???


Your description isn't very comprehensive but I think what you are saying is your brakes are being applied progressively as you drive until they finally lock on altogether?



I have experienced this condition a number of times before and it was relatively common before the days of computers and robots.

I have known one occasion when a faulty vacuum servo gave similar symptoms and that usually very reliable component was made faulty by a leaking brake master cylinder that had over a long period, half filled the brake booster with fluid.

In all other cases the auto-application of the brakes as they are used is due to the fluid expanding as it warms due to use and is unable to escape back into the brake reservoir and so increasingly applies the brakes.

This can be verified easily as the brakes will be hot and momentarily slackening a couple of pipes from the master cylinder or a couple of bleed nipples will immediately free the brakes.



Although there are a few theoretical possible causes for this it is usually (and exclusively in my personal experience) due to bad maintenance or repair in the vehicle's recent history.



Replacement of the brake booster and/or the brake master cylinder without ensuring all the correct clearance and adjustment checks are made is the prime culprit. The second favourite is the person who adjusts the brake pedal linkage to obtain a firmer pedal feel with less free travel.



There is one more thing I can think of that can provide similar symptoms but that applies exclusively to drum brakes and is where the bonding of the lining material is failing causing the brake to self-apply.

Feb 20, 2015 | 2002 Ford Escape

2 Answers

What is the problem?


If you step on the brake pedal and hold it down and you feel the pedal going slowly down, that's for sure your Master Cylinder unless you have a brake fluid leak from one of the calipers. If you have a brake fluid leak, you will notice it because you will have to keep on adding fluid to the system. If you notice a change in your RPM when you brake then you may have an air leak from your vacuum to manifold hose.

Apr 03, 2014 | Toyota LiteAce Cars & Trucks

1 Answer

2004 sebring loosing brake fluid but not leaking onto the ground. Fill master cylinder w fluid and pressed brake for about 2 minutes and brake light came on and car began to smoke. Smoke had a burnt wood...


this is some information on the braking Fluid

Fluid

Damaged parts and a buildup of heat can break down the hydraulic fluid that is in the caliper, brake lines, and master cylinder. The fluid, DOT-3 for the Sebring, will go from a golden-yellow color to a dark brown or black when the particles are damaged from heat. A complete purge of the braking system is required, to replace all of the fluid. Usually, the caliper pistons are at fault, as the pads heat up they come closest to the fluid at the piston. This "cooks" the fluid, and as it is retracted back into the system (as it cools or the brakes are released), it causes the heat to travel into sensitive areas of the system. The seals in the master cylinder and power booster are prone to damage from heat. The fluid will lose its ability to maintain pressure, as it introduces air into the system and compresses.
the other smell could carbon oil that has leaked out of the cam cover seal this would not affect the oil level. but it will start to burn oil if the seal is not replaced. it could also be an antifreeze smell you could have a small leak and when pressure is built up it self seals under pressure, This could be the gasket on the thermostat housing or heat line. check these parts.

Aug 15, 2017 | Cars & Trucks

2 Answers

Losing brake fluid with no leak


It's a sealed system, so it's got to be going somewhere, leaking somewhere (or boiling off from severe braking operations over and over). Since you likely haven't experienced extreme braking, it must be leaking somewhere.
You will have to trace all your brake lines from the master cylinder to each wheel to check for any sign of leaking. Front calipers are easy to spot leaks when they leak. If you have drum brakes on the rear, you may need to pull off the drum to check the wheel brake cylinders. Peel back the rubber boot on each end of the wheel cylinder and look for any fluid leaks there.
Another place to check is at the back of the master cylinder. If a seal is bad there, it has been known to leak fluid inside the car, under the dash. Feel around the carpet under and behind the brake pedal for any wetness. If you find brake fluid there, you will need the master cylinder replaced or rebuilt.
Hope you find the problem. Don't forget to check the ABS system and brake lines, too.

Mar 28, 2012 | 2008 Pontiac Grand Prix

2 Answers

Sometimes the brake peddle has a lot of pressure. When this happens, the car slows down quickly (without touching the brakes) and i have to give it more gas to start off. It does not pull to one side or...


Either there is air leak in the system or the brakes need to be bled.
On abs models, the abs light comes on because of the common faulty abs pump or circuit.

Oct 14, 2009 | Ford Focus Cars & Trucks

1 Answer

2002 tahoe breaks lock up during driving


It sounds like the rear calipers are bad. Raise the rear wheels and see if you can turn the tires. If you can't, open the bleeder. If you still can't replace the caliper. If you can turn the wheel after you open the bleeder, replace the brake hose to that wheel.

Apr 12, 2009 | 2000 Chevrolet Silverado 1500

1 Answer

1996 cutless supreme 3.1 brakes come on automaticly


you have got to adjust the brake light switch so it isn't pushing on the brake peddle see right now it is holding the brake down

Nov 13, 2008 | 1996 Oldsmobile Cutlass Supreme Coupe

1 Answer

My brakes are locking up on all four wheels on my 04 sentra.


Your brake light switch is adjusted in all the way and is pressing on the brake pedal. This causes the brake to be slightly applied. As you drive the vehicle the brake fluid heats up and expands, the brakes will apply more and more until you see the smoke. Bottom line: your brakes are always applied at the master cylinder because something(usually the brake light switch) is out of adjustment.

Nov 12, 2008 | 2000 Nissan Sentra

1 Answer

2000 Dodge caravan "fetching up"


when they replaced the tie rod or when the tie rod broke, it might of damaged the rubber line on the brakes. It wont leak, but inside of that rubber line it may of collapsd causing the brake fluid to apply the brakes but wont release the fluid back to the resivor.

Aug 11, 2008 | 2000 Dodge Caravan

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