have the shift indecision at 36 mph? check this out - Ford Powerstroke Diesel Forum
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Old 09-13-2010, 10:47 AM
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have the shift indecision at 36 mph? check this out

so my truck couldnt decide what gear to be in between 35 and 38 mph really annoying. i attributed it to the slushbox tranny. (i have 4.10 gears to it ma differ for some) and i have hear a TON of people confirm this with their trucks.

while trying to diagnose a different problem with my dask cluster (ended up being a short somewhere, never found it - blew some fuses) i replaced my VSS/RABS sensor in the rear end. i no longer had the shift issues. in fact its more driveable, not that i was that bad to begin with, but all shifts now are crisp, and it never shifts too early an bogs down like it used to.

if anyone else has this shift indecision issue and you replace your VSS/RABS sensor, please post any improvements or otehrwise! $26 fixed a problem the truck had for years.
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Old 09-16-2010, 05:13 PM
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the vss is on the transmission where is the rabs?
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Old 09-17-2010, 05:28 AM
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rear pumpkin. i was told it was in the trans drivers side tailshaft (not there), but saw several posts stating that is 92 it was moved to the rear and the VSS and RABS were combined.
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Old 09-19-2010, 10:31 AM
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Sorry guys whats the VSS and RABS sensor anyway? my 97 f350 does the shift at about 35-40 and lugs up to 55-60? If i change this sensor it wont do that anymore? that would be nice!
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Old 09-20-2010, 05:13 AM
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did u get this at an auto parts store or dealer only?got a part number?
i have this issue in my 96 cant wait to try this out
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Old 09-20-2010, 06:33 AM
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Quote:
Originally Posted by 97Stroker54 View Post
Sorry guys whats the VSS and RABS sensor anyway? my 97 f350 does the shift at about 35-40 and lugs up to 55-60? If i change this sensor it wont do that anymore? that would be nice!
VSS - Vehicle Speed Sensor, RABS - Rear Anti-lock Brake Sensor. at about 36 mph, mine would shift between 3 and 4, up down up down up down, and do it until i either changed my speed or shut off overdrive. it would also lug terribly at that speed when it did shift up under a load. not as bad now, still does but much better. sound like yours?

Quote:
Originally Posted by wa96pwrstrk View Post
did u get this at an auto parts store or dealer only?got a part number?
i have this issue in my 96 cant wait to try this out
ill snag the part number tonight if i remember.
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Old 09-21-2010, 04:07 PM
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Part number looks to be DY 1123
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Old 09-22-2010, 07:08 AM
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Well mine doesnt really shift up and down and go back and forth it just shifts at like 40 and lugs all the way up to highway speed? I dont know if its even an issue really if thats what it is supposed to do?
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Old 09-22-2010, 07:12 AM
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mine does that too. seems better since the swap, but that could just be my imagination. i know if im headed up hill and give it a little more fuel it up-shifts and lugs more, laughably frustrating.
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Old 09-22-2010, 07:15 AM
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Well how much was that sensor and was it a pain to change at all? and where was it? on the pumpkin or closer to the wheel?
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