99 Tahoe advice

[Skools Out]

ferm would this kit fix Stinks and mine as well? mine does it slightly time to time, it's a 99 as well...

http://transgoonline.com/products.ph...dcountview=Yes

[Stinky_Hooker]

Well I talked to a mechanic I really trust, they are top notch folks and he quit building trannys but gave me a number to someone he uses. Im going to take it to him the next couple days to let him drive and pull any codes. Im pretty depressed and thinking my hunting season is pretty well shot as we are pretty tight on $$ right now.


Also noticed this doing some looking. Anyone use anyone online they trust for a newly built one?

http://www.transdepot.net/product.as...FRRbnAodJEoAgA

[THEFERMANATOR]

Originally Posted by Stinky_Hooker

Well I talked to a mechanic I really trust, they are top notch folks and he quit building trannys but gave me a number to someone he uses. Im going to take it to him the next couple days to let him drive and pull any codes. Im pretty depressed and thinking my hunting season is pretty well shot as we are pretty tight on $$ right now.


Also noticed this doing some looking. Anyone use anyone online they trust for a newly built one?

http://www.transdepot.net/product.as...FRRbnAodJEoAgA

Theres not many online places I would trust to rebuild a trans, and the one in your link will not fit yours Stink. Yours is a 2 piece 4L60E as GM went to a removeable bellhousing in 96. Yours is basically a 98 trans even though it is in a 99 as teh GMT-400 tahoe was a carryover for the drivetrain. If you get a 99 it may cause issues as the newer body style uses slightly different valve bodies in them.

And SKOOLS, for $385 I doubt they are using OEM quality solonoids as the last set for a 98 I bought cost about $185 for just the solonoids. I've used aftermarket ones, and everytime they have failed and took the trans out with it. I only use AC DELCO OEM's now.

[Stinky_Hooker]

Ferm I miss understood what you were asking about the p codes.


I just picked it up from the shop and I have a list of the codes Standby till I get home I'm on my phone.

[Stinky_Hooker]

Here ferm

[THEFERMANATOR]

From what I see I would find a new shop to go to. Your truck only has 2 cats, NOT 3. Bad vibration from the torque converter? How did he come to that conclusion? I hate seeing receipts like these as most of the time it means they didn't really check anything. The P0420 and P0430 both being in there concerns me the most. I would check the fuel pressure on it to make sure it is up to par. If it was one or the other I could see a bad cat, but both at the same time normally means a fuel delivery problem or an injector issue. How does it start cold? How does it start hot? Do you have problems restarting it hot after it sits for about 10 minutes? To remove the cats there are a few different ways of doing it, but all of them are pretty illegal and the EPA is out for blood here lately over emissions equipment tampering. PM me for ways to disable them for "testing" purposes if you want. Also the P0440 could be the cause of your P0420 and P0430 codes. If the evap purge solonoid is stuck on, then it can cause a rich fuel condition causing it to surge or buck as well as throw cat converter efficiency codes.

[Stinky_Hooker]

I was assuming the third cat was the 3 of 4 oxygen sensors?


I have a guy that will cut my converters off and weld them straight. I had it done on a 2001 s 10. It cause the light to come on but what will it do to my tahoe will it run right? Hell for that matter I can straight pipe it...what will happen?
Would that be what you would do next?


Also I think he came up with the vibration from the torque converter based on driving it and I told him I replaced it.

Thoughts?

[THEFERMANATOR]

This is a 350 or 5.7L engine with a distributor correct? I have never seen one, but I have heard some 99's came with the 4.8 and 5.3L engine. I just want to make sure. As for your O2 sensor, there is one after each manifold, and one after each cat. If you straight pipe it it will go into engine protection mode and limit the timing WAY back. I do NOT reccomend doing it as CAT's aren't that expensive if you get aftermarket MAGNAFLOW universal ones(last ones I bought were $65 each). With the P0440 code, there is a GOOD chance your WHOLE problem is nothing more than a stuck open evaportive emissions valve venting fuel vapors to the engine and fattening out the mixture. This will cause it to be off on the timing tables and show both cats as having poor efficiency.