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01 Sierra Slt Transmission Death.... Slowly?

Pac3R.JV

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Pac3R.JV New Member

Pac3R.JV

Posted
Posted

I have a 2001 Sierra SLT, with about 196k, I have noticed lately that the truck seems sluggish, dosn't drive like it use too. I have had it since almost new (20k). Acts like the brakes are on all the time, or the ebrake is on. I checked the ebrake as it seems to fine. I also checked all fluids, and they are up to par, and clean. I replaced my rotors at 160k, and the transfluid was replaced then also.

The engine also sounds like its overworking itself. the fan seems to be going all the time. like the motor is to hot.

 

My tow switch don't work any more, found a topic that explains how to fix that, so will do that this weekend. shouldn't cause any greif right?

 

The shift from 2-3 seems to jump up about 300-500rpm before it engages, like it is slipping into neutral. but it won't happen if i accelerate fast or real slow, I live in a retirement community :lol:

 

I Also notice that when passing on the highway, while hard acceleration the shifting seems to be really hard. If im crusin in od, and put my foot to the floor, the down shift from OD to 3 seems to Slam really hard. I havn't tried the other downshift in gears to see if that happes with them...

 

I have an ABS wheels sensor problem (abs kicks in at 20k or less) so the fuse is removed, found another topic that talks about that, but i can't see that causing issues. Anyone know if this truck has the bolt to remove the sensor?

 

I also have a non greased slip yoke, (yes found another topic explaining the clunk) so that makes the clunk when slowing down or accelerating from a stop. could that cause any greif with the shifting problem?

 

Any help would be great, Thanks

Jeff

jro909 Senior Enthusiast

jro909

Posted
Posted

is it the 4.8? i know of a few folks with that year with the 4.8, and it sounds like the clunk fan is always engaged.....as far as the shifts, my 04(100k on the clock) kicks into gear hard on a quick downshift...my guess as far as the rpms i'd say your tranny has worn clutches...

Nytemare Senior Enthusiast

Nytemare

Posted
Posted

Its probably on its way out...does the fluid smell burnt or look like its an odd color.

 

Things dont last forever man...and nearly 200K on a 4L60E is as close to forever as your getting with this trans. Most last about 140K or there about.

 

 

Gm sells a replacement trans for really cheap, and comes with a 3year 100K warranty.

jro909 Senior Enthusiast

jro909

Posted
Posted

nytemare how much is the replacement tranny? with labor and all that( i know it varies but just looking for a guessimate) also is there any loop holes as far as a cheaper price?

Nytemare Senior Enthusiast

Nytemare

Posted
Posted
nytemare how much is the replacement tranny? with labor and all that( i know it varies but just looking for a guessimate) also is there any loop holes as far as a cheaper price?

I think its 2500USD for the trans...not sure with labor....probably 8hrs labor, plus fluid, plus flushing the lines and cooler and doing a flow test on the cooler.

 

I would estimate 4000 bucks....all in.

You can buy the trans and pop it in yourself...I dont know how that would affect the warranty though.

jro909 Senior Enthusiast

jro909

Posted
Posted

i heard some where on here that if you reusue the shell its cheaper or somethen? (i'm planning for the inevitable lol)

gmtech4 Senior Enthusiast

gmtech4

Posted
Posted

the General will do flow check if a problem happens during warranty (if not done at installation)..you don't have to do the job ,that is the tranny guys life ,its what he does every day ,I did it for 3 yrs ,you get new exh donuts,transfer case gasket ,flow rate checked and documented ,cooler flushed at the same time with the same machine,the labour for 4wd is about what Aiden said ,so at approx $115/hr door rate ,plus a few parts and $2500 CDN so $3500 depending on the dealers door rate ,and all you do is drive it away with a SWEET 3 yr warranty ,any dealer will honour that warranty,

 

I put 1 in my 93 C10 before I left the dealer life ,thank *&^%$K for that lol

 

trannies are usually overnight and done the next day if scheduled properly with the service dept ,

 

best deal anywhere,

 

you get what you pay for ,if ya want to flog it ,get it built and sell it ,or go ^^^ way and drive 'er

Nytemare Senior Enthusiast

Nytemare

Posted
Posted
i heard some where on here that if you reusue the shell its cheaper or somethen? (i'm planning for the inevitable lol)

Nope...GM doesn't sell rebuilt transmissions...they're brand new...you dont reuse anything.

 

If my trans were to go in my truck tomorrow, It would be getting a nice new 4L80E...not a 60.

If you want to squeeze as much life as you can out of your trans though...and plan on putting another 60 in when yours does give out...look into a gearvendor overdrive unit. it splits your 4 gears into 8. This helps lighten the load, there isn't that huge gap between first and second gear anymore...and you will save fuel too...your 4th gear (or 8th now) has a drive ratio of 0.55:1 instead of 0.70:1

 

Its like 3 grand for a unit...but having an 8 speed and not cooking your trans by making up for the 47% ratio difference between 1st and 2nd gear.

 

I am looking at putting an 80 in my truck anyway...and one of these units is also high on my list.

 

Not sure if I'm supposed to put the link up for this site...so just Google gear vendors

Pac3R.JV New Member

Pac3R.JV

Posted
  • Author
Posted
is it the 4.8? i know of a few folks with that year with the 4.8, and it sounds like the clunk fan is always engaged.....as far as the shifts, my 04(100k on the clock) kicks into gear hard on a quick downshift...my guess as far as the rpms i'd say your tranny has worn clutches...

 

Its a 5.3, 4x4. I was reading elsewhere that it could be the solenoid B. The fluid still looks brandnew, no discoloration or sweet smell. I take great care of this truck, never towed anything larger then a couch. been on gravel roads only a handfull of times, mainly used for winter hyw driving.

Nytemare Senior Enthusiast

Nytemare

Posted
Posted
is it the 4.8? i know of a few folks with that year with the 4.8, and it sounds like the clunk fan is always engaged.....as far as the shifts, my 04(100k on the clock) kicks into gear hard on a quick downshift...my guess as far as the rpms i'd say your tranny has worn clutches...

 

Its a 5.3, 4x4. I was reading elsewhere that it could be the solenoid B. The fluid still looks brandnew, no discoloration or sweet smell. I take great care of this truck, never towed anything larger then a couch. been on gravel roads only a handfull of times, mainly used for winter hyw driving.

 

Solenoids usually throw codes man...but you can try it.

 

if the fluid isn't burnt...I doubt a clutch is slipping...

Could be your TCC solenoid to...

Have you changed your fluid and filter lately??

 

Also...fix the tow mode issue and see if that changes anything.

Pac3R.JV New Member

Pac3R.JV

Posted
  • Author
Posted
is it the 4.8? i know of a few folks with that year with the 4.8, and it sounds like the clunk fan is always engaged.....as far as the shifts, my 04(100k on the clock) kicks into gear hard on a quick downshift...my guess as far as the rpms i'd say your tranny has worn clutches...

 

Its a 5.3, 4x4. I was reading elsewhere that it could be the solenoid B. The fluid still looks brandnew, no discoloration or sweet smell. I take great care of this truck, never towed anything larger then a couch. been on gravel roads only a handfull of times, mainly used for winter hyw driving.

 

Solenoids usually throw codes man...but you can try it.

 

if the fluid isn't burnt...I doubt a clutch is slipping...

Could be your TCC solenoid to...

Have you changed your fluid and filter lately??

 

Also...fix the tow mode issue and see if that changes anything.

 

 

The fluid was changed about 35k ago, along with the filter. it shouldn't need changing again should it?

gmtech4 Senior Enthusiast

gmtech4

Posted
Posted

gm trannies are rebuilt , Aiden sorry buddy

 

boy alot of posts while I was editing and helping with the sheets lol

Nytemare Senior Enthusiast

Nytemare

Posted
Posted
gm trannies are rebuilt , Aiden sorry buddy

 

boy alot of posts while I was editing and helping with the sheets lol

I read something about "brand new, not rebuilt" in the description of a trans at the dealership a few weeks ago. I know this because there was no core charge...If it were rebuilt there would almost undoubtedly be a core charge.

 

And No jeff 35K is still fairly new for trans fluid. usually 50K for changing.

Nytemare Senior Enthusiast

Nytemare

Posted
Posted
all gm trannies have a core charge ,I returned every one with the RO number on the plastic coffin

:lol: Parts desk guy screwed something up I guess.

 

Either way....still a good deal. :(:D

2500 bones for a trans warrantied for 3 years....plus install.

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