4r100 issue, need help
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Junior User
Joined: Nov 2005
Posts: 94
Likes: 0
From: tennessee
4r100 issue, need help
let me start by saying me trannys are NOT my fortey...
I have a 2000 350 7.3 4x4 auto with 130k miles
the truck has been good, no tranny issuse whatsoever, no slips, no heat, nuthin.
the other day, i backed out of a parking spot, put into "D" and nuthin. just reved like was in neutral. i put it back up in "N" and did it again, it engaged into drive and drove fine. got home scanned for codes and found nuthin. yesturday, as i was leaving the house, it happened again, and i could not get it to engage. if i put it in drive, it reved up and moved a little bit. ran through all the other gears, 1st,2nd,reverse. all ran fine. again no codes, fluid level is correct, not burnt. this morning i tried again and "walla" no problems, truck seems to drive normal. I have only driven it down the road and back about a mile, but smooth shifts, engages everytime, etc....any one have this happen before? i dont want to have a full rebuild, but what might it be????? and how can i figure it out? all tranny shops say, "REBUILD"
I have a 2000 350 7.3 4x4 auto with 130k miles
the truck has been good, no tranny issuse whatsoever, no slips, no heat, nuthin.
the other day, i backed out of a parking spot, put into "D" and nuthin. just reved like was in neutral. i put it back up in "N" and did it again, it engaged into drive and drove fine. got home scanned for codes and found nuthin. yesturday, as i was leaving the house, it happened again, and i could not get it to engage. if i put it in drive, it reved up and moved a little bit. ran through all the other gears, 1st,2nd,reverse. all ran fine. again no codes, fluid level is correct, not burnt. this morning i tried again and "walla" no problems, truck seems to drive normal. I have only driven it down the road and back about a mile, but smooth shifts, engages everytime, etc....any one have this happen before? i dont want to have a full rebuild, but what might it be????? and how can i figure it out? all tranny shops say, "REBUILD"
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Could be the position sensor or VB issue -- worth looking at since you're looking at several grand as an alternative. You might think about getting a TransGo shift kit -- it forces you to tear the VB apart and clean it all out. Of course the risk is that if it *is* a trans issue, you're wasting ~$75 to $100 on a kit. Or not -- give the trans rebuilder the kit and maybe they'll cut you a bit of a break on some parts. 
Logistics Pro
Joined: Mar 2002
Posts: 3,881
Likes: 84
From: Wake Forest, NC
Could be the position sensor or VB issue -- worth looking at since you're looking at several grand as an alternative. You might think about getting a TransGo shift kit -- it forces you to tear the VB apart and clean it all out. Of course the risk is that if it *is* a trans issue, you're wasting ~$75 to $100 on a kit. Or not -- give the trans rebuilder the kit and maybe they'll cut you a bit of a break on some parts.
