MalcolmV8
Well-Known Member
- Joined
- June 29, 2005
- Messages
- 152
- Reaction score
- 0
- City, State
- Kansas City, MO
- Year, Model & Trim Level
- 05 Tundra DC
Hey guys,
Been a little while. Thanks to everyone who helped me with 4r70w questions when I built my V8 AWD Ranger. It has a 2000 Explorer 302, 4r70w, and the AWD transfer case. I'm using a 92 Mustang ECC and the Baumman controller for the tranny.
Soon after I got everything running I developed a weird problem that I've never fixed. If I drive light throttle or even somewhat heavy footed everything works fine. If I drive WOT and hold it till red line it works just fine and shifts at 5000 rpm or so and everything's OK.
The problem is when I WOT and have it screaming up to read line and before it gets there I let off the gas. It either flares for a second or else it jolts quite violently like it jumped between two gears and couldn't decided where to go.
I've found if I'm WOT and something comes up that I have to let off before a red line shift if I ease off the gas it reduces the chance of it flaring or jolting and will sometimes shift normally. I've also found that if I WOT from a stop up to 80 or what ever and then jam on the brakes and stop and repeat over and over a few times and really get things nice and hot the problem goes away and I cannot reproduce it. However if I cruise for a few miles driving nicely and let the tranny temps come down a little I can reproduce it again, almost every time.
I have no clue what causes this or if it's something I can even fix? Not exactly a show stopper but it is annoying and would be nice to fix.
Thanks guys
Malcolm
Been a little while. Thanks to everyone who helped me with 4r70w questions when I built my V8 AWD Ranger. It has a 2000 Explorer 302, 4r70w, and the AWD transfer case. I'm using a 92 Mustang ECC and the Baumman controller for the tranny.
Soon after I got everything running I developed a weird problem that I've never fixed. If I drive light throttle or even somewhat heavy footed everything works fine. If I drive WOT and hold it till red line it works just fine and shifts at 5000 rpm or so and everything's OK.
The problem is when I WOT and have it screaming up to read line and before it gets there I let off the gas. It either flares for a second or else it jolts quite violently like it jumped between two gears and couldn't decided where to go.
I've found if I'm WOT and something comes up that I have to let off before a red line shift if I ease off the gas it reduces the chance of it flaring or jolting and will sometimes shift normally. I've also found that if I WOT from a stop up to 80 or what ever and then jam on the brakes and stop and repeat over and over a few times and really get things nice and hot the problem goes away and I cannot reproduce it. However if I cruise for a few miles driving nicely and let the tranny temps come down a little I can reproduce it again, almost every time.
I have no clue what causes this or if it's something I can even fix? Not exactly a show stopper but it is annoying and would be nice to fix.
Thanks guys
Malcolm