99 Tahoe advice

[Skools Out]

stink it's the valve body, that fixed mine, just need your valve body rebuilt.

[Stinky_Hooker]

Im taking in to the tranny guy next, just wondering, never heard of this.

[THEFERMANATOR]

Did he tell you what the codes were? I need to know what the P code numbers were to tell you what they might mean. And the codes for a 99 5.7L are HORRIBLE for telling you what the problem actually is. RARELY have I seen them throw a code for a bad O2, the ywill normally throw a misfire code when an O2 sensor fails. If there was a P1870 code in it, then the valve body needs to be done first before you go any furthur.

[ssiredfish]

Originally Posted by THEFERMANATOR

Did he tell you what the codes were? I need to know what the P code numbers were to tell you what they might mean. And the codes for a 99 5.7L are HORRIBLE for telling you what the problem actually is. RARELY have I seen them throw a code for a bad O2, the ywill normally throw a misfire code when an O2 sensor fails. If there was a P1870 code in it, then the valve body needs to be done first before you go any furthur.

Best thing we ever did was buy one of those code computers. At $50 a read it doesnt take long to pay for itself......

[Stinky_Hooker]

There were no Pcodes. Its was low effeciency through caty convertors which he said was waaay before I started having problems, a fuel level sensor (which I knew, cause my fuel gauge doesnt work) thats it. I was hoping for a trans code but nothing.

I only took it to him cause he is really honest and wanted to see A: if there were trans codes and B: if it may have been an engine issue before concluding it was the tranny, which it obviously is. He gave me the # to a tranny guy he trusts and Im going to call him this afternoon when I get off work (left the number at home). If they work tommorrow I may run it by today, if not Monday. I been driving it in 3rd only 40 MPH or so to keep the shudder down to hopefully not cause any damage. I only drive 5 miles to work each way. No driving it otherwise.

[THEFERMANATOR]

Originally Posted by Stinky_Hooker

There were no Pcodes. Its was low effeciency through caty convertors which he said was waaay before I started having problems, a fuel level sensor (which I knew, cause my fuel gauge doesnt work) thats it. I was hoping for a trans code but nothing.

I only took it to him cause he is really honest and wanted to see A: if there were trans codes and B: if it may have been an engine issue before concluding it was the tranny, which it obviously is. He gave me the # to a tranny guy he trusts and Im going to call him this afternoon when I get off work (left the number at home). If they work tommorrow I may run it by today, if not Monday. I been driving it in 3rd only 40 MPH or so to keep the shudder down to hopefully not cause any damage. I only drive 5 miles to work each way. No driving it otherwise.

The 2 conditions you describe would have both been a P code. The ECM reads out trouble codes for the powertrain(engine/trans) as P or powertrain codes. The cat efficiency code can EASLIY cause the problem you describe from it as I have SEEN it happen on 99 5.7's. This is why I said we needed to know what the P codes were to go off of, and NOT to trust the diagnostic trouble codes given for this engine as most of teh time they can lead you on a wild goose chase if your not familiar with the system. As for seals on teh input shaft, I find it HIGHLY unlikely the teflon seals have gone bad unless somebody pulled the trans apart and put it back together dry with a sledge hammer. Since the late 80's GM has used teflon sealing rings and they are VERY resiliant and hardly ever need changing even during a rebuild.

I haven't ever used one of these, but I have read good things about this for the P1870 repair for alot less money. Supposedly it will work better in valve bodies that are severely worn that the tRANSGO kit won't fix.
http://www.teckpak-fitzall.com/spgm.cfm?id=A74741Q

[Stinky_Hooker]

Well crap, to eliminate the cats starting to get clogged what do I do short of replacing them for alot of $$.

[Stinky_Hooker]

Well Ferm, I thought I would update you. Took it to the transmission guy and dropped it off two weeks ago, (I got it back last tuesday). On the way over there to drop it off it started getting real bad.

He called me the day after I dropped it of and said it was definately loosing pressure and they found a good bit of dust from what he thought was the 3rd and 4th gear clutches wearing out and thats what I was feeling on my way over. Anyways, he offered to go into it and try a few different things to figure wear the pressure was being lost. It may have been overkill but with my several months of frustration and missing over a month of hunting I told him to give me a price and just rebuild the damn thing!!

Anyways, long story short and $1900 later she's running like a top. I felt good about the decision because of the piece of mind I FINALLY have, the motor only has 40K on it and he gave me a 12 month/12K mile warranty on the tranny.

The truck might be an old 99' but I love her and she's worth it to me...and PAID for.

[Stinky_Hooker]

Also, does anyone have an extra grill emblem laying around or where to get one reasonable. Mine disappeared!

[smokeonthewater]

http://www.ebay.com/itm/1991-2005-CH...5384c8&vxp=mtr