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Discussion Starter #1
I just performed the grey wire mod on my 98 Tacoma TRD (4wd) and am having problems with the shifting. The truck is an auto and really shifts hard and actually doesn't engage in overdrive. It will wind up to 3000 RPM before shifting from 1st to second and second to third. I know I did the mod correctly, grounded it right, and used the right wire. I know the mod had something to do with this problem because it started right after I did the mod. Anyone have any similar experiences and any way to help the situation out other than returning it to stock? Thanks

RYan
 

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I think this is due to the fact that when activated, weather its in 4WD or 2WD it thinks its in 4WD and changes the shift points. This is normal behavior. I think you will notice when deactivated it shifts normally.
 

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SAStoy said:
I just performed the grey wire mod on my 98 Tacoma TRD (4wd) and am having problems with the shifting. The truck is an auto and really shifts hard and actually doesn't engage in overdrive. It will wind up to 3000 RPM before shifting from 1st to second and second to third. I know I did the mod correctly, grounded it right, and used the right wire. I know the mod had something to do with this problem because it started right after I did the mod. Anyone have any similar experiences and any way to help the situation out other than returning it to stock? Thanks

RYan
Been reading up on the grey wire mod lately. How did you mod it? - at the fuse box or at the tranny/tcase? Grounding the grey wire at the fuse box is supposed to bypass the ECU which would eliminate your problem ???
Again, not from experience but what I have read. Hope it helps.
 

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Discussion Starter #4
bb609 said:
Been reading up on the grey wire mod lately. How did you mod it? - at the fuse box or at the tranny/tcase? Grounding the grey wire at the fuse box is supposed to bypass the ECU which would eliminate your problem ???
Again, not from experience but what I have read. Hope it helps.
I did the mod at the 4wd box behind the driver side kick panel. I would think it would bypass the computer but apparently it is not. I know I did the mod right, followed it step by step. Any other suggestions?
 

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Discussion Starter #5
GoodyearMTR said:
I think this is due to the fact that when activated, weather its in 4WD or 2WD it thinks its in 4WD and changes the shift points. This is normal behavior. I think you will notice when deactivated it shifts normally.
Yeah it may be normal but if I don't have overdrive my truck is pretty much working ten times harder than it has to out on the highways
 

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You must have not read my post carefully. "I think you will notice when deactivated it shifts normally". When depressing lock button it tells ECU that truck is in 4WD, this changes shift points, this is normal behavior. When the locker is deactivated, shifting is normal. So in fact it shouldnt effect highway driving, unless locker is engauged.
 

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SAStoy said:
I just performed the grey wire mod on my 98 Tacoma TRD (4wd) and am having problems with the shifting. The truck is an auto and really shifts hard and actually doesn't engage in overdrive. It will wind up to 3000 RPM before shifting from 1st to second and second to third. I know I did the mod correctly, grounded it right, and used the right wire. I know the mod had something to do with this problem because it started right after I did the mod. Anyone have any similar experiences and any way to help the situation out other than returning it to stock? Thanks

RYan
Did you ground out the right wire from the plug in connector
 

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Discussion Starter #8
TRDUSA2002 said:
Did you ground out the right wire from the plug in connector
Bingo. I guess I didn't read the instructions as closely as I had thought. Took me five minutes, grounded out the plug. She is back up and in good shape. Thanks for your help guys
 
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