What would a 'slip' feel like while driving?
Shrewz92
07-05-2009, 09:01 PM
1995 Century, 3.1L, 4T60E.
Service Engine Soon light is on, and will click off after couple of days. Scan @ Advance Auto Parts generates a P1870 code. I've read this could be slippage of torque Converter, or a valve blockage. I'll honestly say I've NEVER felt an auto transmission 'slip.' What would that feel like when cruising at highway speed (55-65 mph)? Would that feel like a 'stumble?' Would that feel like a 'jerking' motion?
Additonal Notes that may help:
I know that I have trans fluid in, actually to above top of cross-hatch on dip-stick.
Doesn't look like it's frothing while idling and it being checked.
Fluid is healthy reddish pink.
When purchased, I added about 1.5 pints of high-mileage trans fluid to what was in existence in the system, as it was reading near bottom of cross-hatch.
Occasionally, When putting shift-lever in Drive, there is no engaging of gears, until approx 15 - 25 seconds, then it smoothly enters 1st, and shifts nice and smoothly through remaining gears. Would too much fluid situation cause this 'non-engagement?'
If it's a valve-body needing replaced, is this something that one can replace from outside, or from under trans with pan off?
Service Engine Soon light is on, and will click off after couple of days. Scan @ Advance Auto Parts generates a P1870 code. I've read this could be slippage of torque Converter, or a valve blockage. I'll honestly say I've NEVER felt an auto transmission 'slip.' What would that feel like when cruising at highway speed (55-65 mph)? Would that feel like a 'stumble?' Would that feel like a 'jerking' motion?
Additonal Notes that may help:
I know that I have trans fluid in, actually to above top of cross-hatch on dip-stick.
Doesn't look like it's frothing while idling and it being checked.
Fluid is healthy reddish pink.
When purchased, I added about 1.5 pints of high-mileage trans fluid to what was in existence in the system, as it was reading near bottom of cross-hatch.
Occasionally, When putting shift-lever in Drive, there is no engaging of gears, until approx 15 - 25 seconds, then it smoothly enters 1st, and shifts nice and smoothly through remaining gears. Would too much fluid situation cause this 'non-engagement?'
If it's a valve-body needing replaced, is this something that one can replace from outside, or from under trans with pan off?
Shrewz92
08-05-2009, 02:20 PM
Update:
Weekend of 8/1: Changed Transmission Modulator and found crack in vaccuum hose entering modulator. Replaced and no hesitation, now, before engaging 1st gear from standing stop. After change of fluid & filter & Modulator, no check engine light until approx 108 miles after. Still P1870. Is there a deeper diagnostic scan that will show what that code is caused by?
Weekend of 8/1: Changed Transmission Modulator and found crack in vaccuum hose entering modulator. Replaced and no hesitation, now, before engaging 1st gear from standing stop. After change of fluid & filter & Modulator, no check engine light until approx 108 miles after. Still P1870. Is there a deeper diagnostic scan that will show what that code is caused by?
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