95 Jimmy4x4 w elect trans - EGR - can it affect shifting/engagement??

e the time to re/re it yet.  The new one will be put in shortly.  I am curious though about driving with an electronic transmission

driving fine with the EGR unplugged (this EGR is fully electronic with no hoses) for about a week or so.  Today the truck started to rev high

oth in gear and in neutral, putting the truck in reverse wasn't consistent.  It would act as though it was in neutral when put in reverse.  After cycling

There is a CEL but I haven't scanned it yet as I just took it off a flatbed in my driveway mere minutes ago.

ank (I was going to build this truck to support 1000hp so I built the trans mission accordingly).  The truck isn't abused and usually shifts to firml y

servo with a shift kit installed).  My question is whether or not the EG R issue could affect the system from shifting into reverse....??

Andrew-why run it w/o an EGR? Pull it-clean it and make sure the pintle has full travel, doesn't stick and put a 'screened' gasket on it and away you go. Unsure of your other issue but...scan it(probably po 140x-EGR), clean it as previously explained-doubt you need a new EGR-I've cleaned 100's-and then see what you have! jp ps not sure about the high idle-sounds like a possible vacuum leak but....get the EGR squared away-while it's off start the Jimmy-when safe, and rev it a few times to get out any debris that may be en route to the EGR.pss not sure at this point but my initial thought is your issues are unrelated but whenever I have an obvious problem with 'spinoff' problems fix the obvious one first and then who knows....maybe it'll fix the second!

Thanks my friend! My trannie problem has gone from bad to worse so I am taking it the original builder this morning. I fear that it's a torque converter/sprag, sunshell, or one of the two that would have decimated lots of good bands and pucks in the process. On the EGR side... Yes, I have cleaned and RE/RE'd many EGRs. I think this one has a problem with the pot that feeds back from the pintle but I can't be sure. I have another laying around here as a backup. Why leave it disconected?? It was almost undrivable with it stuck open and there wans't enough hours in that particular day. I hope this gearbox isn't a money pit.... Thanks again! Andrew.

The EGR will not affect the trans. The valve bodies in those are notorious for going bad/sticking.

Is there an upgrade or a technique that can "cure" the problem, from the rebuilder's standpoint?

I hope it isn't anything nasty that's for sure. Thanks for the feedback. I would hate to dump this thing after putting a new transmission and motor with headwork in it.... Don't even get me started about the lovely vac actuated 4WD woes...

Thanks again, Andrew.

The bench exam showed 2 clutches smoked and a sprag overheated. They said that I could likely drive for awhile with the torched sprag but they didn't recommend it as it would likely fail sooner than later.

2 clutches, 2 bands, and a forward sprag plus reseal at $1200 CDN. I know the guy and he's a decent guy who usually builds phenomenal transmissions. I don't know if I caused the clutches to burn or not but we used the highest quality Borg and TransGo components in that box. I was a little shocked. I have been rough on it more than a few times but never run it dry and I thought it was built to take it. I guess I need to lighten up a little.

Thanks for any help and interest. Andrew.