2002 Silverado After a Transgo Kit

Ok, i had the infamous weird shift in between 1-2 and 3-4 sometimes in my 2002 silvy 4.8 4l60e, but more than not, anyway, so after many researches on this board i decided to get a transgo kit and have it installed, so i took it to a trusted local shop and had it installed, they said everything they could see while they had the tranny apart looked good, they said the fluid looked good and everything. So they put it in and i still have the bump, knock whatever you want to call it every now and then in between the above shifts, not as bad, but i now am thinking its something else, like a u joint or something, so im not sure what is going on now.

Ok, i had the infamous weird shift in between 1-2 and 3-4 sometimes in my 2002 silvy 4.8 4l60e, but more than not, anyway, so after many researches on this board i decided to get a transgo kit and have it installed, so i took it to a trusted local shop and had it installed, they said everything they could see while they had the tranny apart looked good, they said the fluid looked good and everything. So they put it in and i still have the bump, knock whatever you want to call it every now and then in between the above shifts, not as bad, but i now am thinking its something else, like a u joint or something, so im not sure what is going on now.
did they check out the electrical connector at the transmission. some have had wierd shift problems because of damage to contacts in this fixture.......

Is it on the outside of the transmission housing? if so which side and what should i do to remidy it? Thanks!

Anyone? Which side and what to do to remidy it?

passenger side of trans, behind the heatsheild

Was the servo changed to the Corvette Servo? If not, were the seals replaced?

//2000CAYukon

I couldnt tell you that or not on the seals, do new seals come with the kit for a 4l60E? If they do then yes cause they used everthing in the kit. And a no on the corvette servo.

I couldnt tell you that or not on the seals, do new seals come with the kit for a 4l60E? If they do then yes cause they used everthing in the kit. And a no on the corvette servo.

No the seals do not come with the kit. Might be a good idea to pull the servo (can be done with Tranny in the truck) and make sure the seals look good or just replace them with a set of D-ring seals.

The band is applied in 2nd and 4th gear and the servo is what applies or releases the band. Since you are having issues with 1-2 and 3-4 shifts, the band being applied is common in these 2 shifts. The servo pin may be the wrong length or there could be an issue with the servo itself or with seals in the servo. Something to think about.

//2000CAYukon

If i get a corvette servo is this something that i can do myself nothing that is as complicated as the transgo kit. and if i get a corvette servo is that all i need and does it just bolt off and on of the tranny. Where is it and what does it look like? is it on the pass side under the heat sheild, cause i was under there last night and pulled the heat sheild off and i was checking all connections on both sides of the tranny to make sure they were all fine and they were. Also what servo do i need exactly? thanks!

If i get a corvette servo is this something that i can do myself nothing that is as complicated as the transgo kit. and if i get a corvette servo is that all i need and does it just bolt off and on of the tranny. Where is it and what does it look like? is it on the pass side under the heat sheild, cause i was under there last night and pulled the heat sheild off and i was checking all connections on both sides of the tranny to make sure they were all fine and they were. Also what servo do i need exactly? thanks!


I'm beginning to think your shift problem is not the transmission.especially after the mod was done and the transmission shop checked it out.....maybe this shift is engine missss.......

I just changed fuel filter air filter spark plugs and wires, the engine seems to run fine. I might have the gap on the plugs a hair too big. But what could i do and i dont have any check engine lights

I just changed fuel filter air filter spark plugs and wires, the engine seems to run fine. I might have the gap on the plugs a hair too big. But what could i do and i dont have any check engine lights

it is possible that the maf is the bad guy. someone on forum said to give the maf a tap and if the engine skips then the maf is bad. another is cold air intake mod in winter sometimes will give this type of problem.or maybe the maf needs to be cleaned if the little wires that sense air flow have just a little oil/road grime on them they will not report to the pcm the correct air flow.CRC maf cleaner works good to clean maf .if maf was never cleaned it should be now because of the mileage and age of it......

I just changed fuel filter air filter spark plugs and wires, the engine seems to run fine. I might have the gap on the plugs a hair too big. But what could i do and i dont have any check engine lights

if you used platinum plugs I believe that gapping is not recomended.
the gap is .060 on my 5.3l but I did not have to adj this as it was correct out of box. if you took out plugs from engine and you found the gap incorrect then most likely as i found out the ac delco plugs the platinum chip falls off..................

I changed the gap on my plugs last night they were at .060 i changed them to .040. I cant really feel a difference, but not that i was expecting to. I have had to clean MAFs before on my blazer, it made all the difference in the world after i cleaned it, i did pull the MAF monday night and the MAF doesnt come apart like it did in the blazers and other cars. So i was thinking maybe just a spray of somthing through the honeycomb screen to clean the wires? By the way my truck is a 2002 4.8 with 59,000 miles on it, sorry i didnt post that before, but now i have to take it to the place where i got all new steel brake lines put on last week cause the two at the master cylinder are leaking. I had the rusty brake line blues!

I changed the gap on my plugs last night they were at .060 i changed them to .040. I cant really feel a difference, but not that i was expecting to. I have had to clean MAFs before on my blazer, it made all the difference in the world after i cleaned it, i did pull the MAF monday night and the MAF doesnt come apart like it did in the blazers and other cars. So i was thinking maybe just a spray of somthing through the honeycomb screen to clean the wires? By the way my truck is a 2002 4.8 with 59,000 miles on it, sorry i didnt post that before, but now i have to take it to the place where i got all new steel brake lines put on last week cause the two at the master cylinder are leaking. I had the rusty brake line blues!

you must remove the maf from the rubber duct this can be done with some dish soap and water in spray bottle , spray joints , warm removed ducting and the soap will safely lubricate the joint so it can be removed, then the wires will be visable for your maf spray. use small amount of vasoline to aid in the reinstallation of ducting to MAF only use approved maf cleaner other chemicals will destroy electronics imbedded in the MAF

Ya, i know how to take it out i had it out on monday, i was just saying the honeycomb screen doesnt come off like in other gm cars so you can gently clean the wires with a q-tip like i have done in the past. Thanks!

Ya, i know how to take it out i had it out on monday, i was just saying the honeycomb screen doesnt come off like in other gm cars so you can gently clean the wires with a q-tip like i have done in the past. Thanks!
I 'm surprised that you are not aware that no touching of these wires is allowed as they can be damaged with any movement. you are supposed to use an appoved cleaner like crc maf cleaner to be used to clean maf's anyother cleaner is damaging . you simply install the straw to spray head and give the wires a good spray. you do not touch wires at all......also if the maf was totally removed from air ducting how is is you did not have a clear view access to the wires? the intake manifold side is the side that the wires should be in clear view.

Go take a look through the s-10 blazer forums thats all they talk about is taking the MAF apart to clean it, the blazers get so bad that there is a thick black build up on the wires. I know that the wires are very delicate, and that a replacement part is very expensive. Thats why i said "gently" clean the wires, and no the engine intake side of the MAF doesnt give you a clear view of the side of the wires that get covered in gunk, its the filter side of the MAF that gets covered in gunk, and on that side of the MAF is a honeycomb screen that makes it very difficult to look down through and tell if there is a build up on the wires. On the blazers there were 4 screws that allowed you to remove that screen to easily clean the wires, i have done this on many blazers and monte carlos so please dont preach to me about what you think i can be doing to my MAF, cause ive been cleaning MAFs for quite a while and have not hurt one yet, unless you consider a better running car hurting the MAF. Thank you!

Go take a look through the s-10 blazer forums thats all they talk about is taking the MAF apart to clean it, the blazers get so bad that there is a thick black build up on the wires. I know that the wires are very delicate, and that a replacement part is very expensive. Thats why i said "gently" clean the wires, and no the engine intake side of the MAF doesnt give you a clear view of the side of the wires that get covered in gunk, its the filter side of the MAF that gets covered in gunk, and on that side of the MAF is a honeycomb screen that makes it very difficult to look down through and tell if there is a build up on the wires. On the blazers there were 4 screws that allowed you to remove that screen to easily clean the wires, i have done this on many blazers and monte carlos so please dont preach to me about what you think i can be doing to my MAF, cause ive been cleaning MAFs for quite a while and have not hurt one yet, unless you consider a better running car hurting the MAF. Thank you!

are we talking about a 2002 silverado? if the intake manifold side of the maf does not allow free and clear view of the small sensing wires then it's installed backwards or it is the wrong maf.......also I have no problems if you use the wrong method or chemicals in this proceedure as you will be opening your wallet.

When you say intake side of the MAF do you mean engine intake as in the Throttle Body side of the MAF or when you say intake do mean the side of the MAF that takes in the air. Because the engine/ throttle body side of the MAF does have open access to the wires, but it is the wrong side of the wires that get dirty, the air filter/box side of the MAF has a honeycomb screen on it to keep chunks from coming through and hitting those wires, and the screen is not removeable so the only way to clean it would be with a spray.

When you say intake side of the MAF do you mean engine intake as in the Throttle Body side of the MAF or when you say intake do mean the side of the MAF that takes in the air. Because the engine/ throttle body side of the MAF does have open access to the wires, but it is the wrong side of the wires that get dirty, the air filter/box side of the MAF has a honeycomb screen on it to keep chunks from coming through and hitting those wires, and the screen is not removeable so the only way to clean it would be with a spray.

the wires must be clean. my wires looked clean, my air filter side was clean also. but after i used the spray as a forum member recommeded and after internet searches and other articles on the maf operation i found that a film that can't even be seen will cause problems like yours. after i cleaned my maf the engine was very responsive to throttle changes and this i noticed at hyway speeds.....

ok, can i get the MAF cleaner at Advance Auto Parts? Im going to do it tonight.

Ok, i got some MAF cleaner last night and cleaned my MAF. i can notice a slight difference in the smoothness that the engine runs and maybe a slight difference in shifting, let me ask you this, i have done alot of chip tuning with TBI cars, and im sure the computers still work somewhat the same way, so, when doing a mod or cleaning something that would affect the computer like cleaning the MAF so it changes what the computer sees as far as air flow goes, does it take a couple cycles through open and closed loop in the computer for it to learn what has happened and adjust itself. I know when i program a new chip the changes are instant, but you do notice after you drive is a couple times your computer smooths itself out, so with all that being said, would my truck run a little better after i cleaned the MAF, after i cycle it though open and closed loop a couple times, and the computer teaches itself? Just a question? But i did notice a slight difference, but nothing like when i cleaned the MAF on my 2000 blazer, oh my! the wires were completely black and had a black gunk build up on them, when i would start out at a dead stop with the blazer before i cleaned the MAF, it would almost stall out a couple times, then i pulled the MAF and cleaned it and it was like night and day! It actually felt (no kidding or exageration) like i pulled the old motor and installed a brand new bigger and better one, thats how bad the MAF was dirty, and how bad it made the engine run! So anyway, i had nothing against cleaneing the MAF, or disbeleif in what you guys were saying before cause i know first hand how a dirty MAF can F things up, but I couldnt clean it the way i cleaned other ones.

there is no learning . this is simply a sensor just like any other sensor it measures something. the maf measures air flow and if it does not correctly report to PCM the correct amount of air entering the engine it cannot properly manage the fuel mixture. so it is on these engines very important that this be cleaned even if it looks clean. i have not yet determined how often this should be done or how to measure for proper maf operation to determine clean intervals. but i'm gonna do the maf when air filter needs servicing and see how that works out.

On the MAF cleaner can it said for best results clean the MAF everytime you change the air filter.

On the MAF cleaner can it said for best results clean the MAF everytime you change the air filter.

so what about the shift problem ? has it been running ok?

Its not bad, cleaning the MAF maybe corrected the shift problem slightly. I think i just might be expecting too good of shifts from this truck, ive never had a truck with an automatic and my last two cars have been SUV's. Am i wrong to think that my tranny should shift like it would if i was in a car? i might just have a normal shift and not know it. Anyway. Thanks!

Its not bad, cleaning the MAF maybe corrected the shift problem slightly. I think i just might be expecting too good of shifts from this truck, ive never had a truck with an automatic and my last two cars have been SUV's. Am i wrong to think that my tranny should shift like it would if i was in a car? i might just have a normal shift and not know it. Anyway. Thanks!

When my 2000 sil was new, my first truck, i noticed that it had a slower shift. this was ok with warm temps , but as cold weather arrived i did not like it. too slow for me. so i did a little research and found that synthetic would speed up shifting. when winter arrived and the temp was 6 below the transmission shifted normally and that is when my other vehicle was converted to mobil synthetic. the fluid also can take more heat than non synthetic and it definitly has a faster solid shift . this is very noticable at hyway speed when passing. it now sells for 8.oo quart and you will need 12quarts to get most of the old fluid out.

I know I'm going to regert saying this.. I just paid mine off; but my '02 with the 4.8 has NEVER had the funky clunks shifting to-from ANY gear.

I am curious though.. My truck has not ever been to a chevy dealer since I bought it. I wonder how much of this could be bad firmware updates through the years? I test software for my day job; so these are the things I wonder about...

ok, here in PA we have had a string of warmer weather (40-50*) and i have noticed just today with the warmer temp that it shifted pretty good, i got the truck in october and the weather got cold right after that and hasnt been this warm since, i thinking that i might just have a slower shift in the cold, also this only happens at lower speeds, and if you were driving the car that is exactly what it feels and sounds like, a real slow shift, if i give it some peddle at acceleration i dont get the weird shift, its only at low acceleration speeds. What exactly would i have all to do to change to synthetic? I just had a new filter put in, in december when the transgo kit was put in so i dont think i need a filter. how would i get all the old fluid out successfully? thanks!

Also about the firmware update, is there a way that i could use my laptop to install original firmware, i have cables and software to read ECM's from my laptop, i have datalogged and burned chips for Thirdgen camaro's with TBI systems, i know that these ECMs are writeable so does anyone happen to know what program to use and where i could get the firmware from, thanks!

start new post concerning replacing transmission fluid. you'll get more resposes than you can imagine........but after reading your last post this synthetic fluid is your cure to slow shift. higher pressures than reg fluid at low temps this i believe is the reason it works better.

A dumb ass i work with was spraying ether into the air filter of a silvy while another one was turning the engine over and it blew the intake apart and the honey comb of the MAF into the air filter . it looked like metal shavings from a drill press afterward.