why does my damn e40d rarely downshift? - Ford Powerstroke Diesel Forum
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post #1 of 22 Old 04-28-2012, 06:14 AM Thread Starter
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why does my damn e40d rarely downshift?

It seems that my truck is very stubborn to downshift sometimes. Last night there 5 people in my truck and I was trying to merge on the highway, and since it didn't downshift it took like a whole minute to reach 60mph!
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post #2 of 22 Old 04-28-2012, 07:01 AM
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My buddies truck is somewhat doing the same thing, when it gets into a hard pull it wont downshift so the truck starts to shutter instead of going

Elmo/Shane

96 F350 4x4
Everything.
And its expensive.

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post #3 of 22 Old 04-28-2012, 08:25 AM Thread Starter
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Mine doesnrt shutter, its just got zero power because the rpms are so low
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post #4 of 22 Old 04-28-2012, 08:31 AM
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maybe the skinny pedal is screwing up? someone correct me if i am wrong but the kickdown position is controled by pedal position? (being as it's pretty much fly by wire - no cables)

95 sc lb 4x4 5 speed
ts 6 position chip, boost relief valve, 4" intake, 3" downpipe-5" rest of the way to a stack, fpr shim, twin 16" s-blade electric fans, poly bushings, zoom variable torque ceramic clutch with solid flywheel, hydroboost, stancor relay, exhaust brake, ss hpx line, 140v idm, bar and plate intercooler, glowshift gauges, gt grant signature series wheel with black billet hub, rockford door speakers- pioneer head unit- 2x 12" kenwood w3 subs
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post #5 of 22 Old 04-28-2012, 08:39 AM
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does u're speedo bounce at all? maybe speed sensor screwing around too?

95 sc lb 4x4 5 speed
ts 6 position chip, boost relief valve, 4" intake, 3" downpipe-5" rest of the way to a stack, fpr shim, twin 16" s-blade electric fans, poly bushings, zoom variable torque ceramic clutch with solid flywheel, hydroboost, stancor relay, exhaust brake, ss hpx line, 140v idm, bar and plate intercooler, glowshift gauges, gt grant signature series wheel with black billet hub, rockford door speakers- pioneer head unit- 2x 12" kenwood w3 subs
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post #6 of 22 Old 04-28-2012, 12:07 PM Thread Starter
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Yes my speedo bounces around a bit.. Figured its from my lift and tires.

I found out the problem (kinda). Third gear shifts MUCH too early sometimes, and I mean super early, and the only way to kick down is putting it into 2nd gear.
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post #7 of 22 Old 04-28-2012, 04:14 PM
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yup, if u're speedo is jumping then i would look into replacing the speed sensor ontop of the rearend. that could be why it's shifting early into 3rd (thinking that it's going faster than it really is) hope u find the issue

95 sc lb 4x4 5 speed
ts 6 position chip, boost relief valve, 4" intake, 3" downpipe-5" rest of the way to a stack, fpr shim, twin 16" s-blade electric fans, poly bushings, zoom variable torque ceramic clutch with solid flywheel, hydroboost, stancor relay, exhaust brake, ss hpx line, 140v idm, bar and plate intercooler, glowshift gauges, gt grant signature series wheel with black billet hub, rockford door speakers- pioneer head unit- 2x 12" kenwood w3 subs
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post #8 of 22 Old 04-28-2012, 05:09 PM
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Did you correct your speedo for the larger tires?

Jack
97 F250 Xlt, built E4od, D60 swap, Baby swamps, tunes by Dp
1.0 housing w/ wwII, 203* t-stat, diy 6637, 4" exhaust
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post #9 of 22 Old 04-28-2012, 05:19 PM Thread Starter
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No I didn't not correct my speedo for the larger tires. I thought a tuner could do that, but they can't, I heard ts has a speedo corrector or something?

I thought its as simple as swapping a sensor in the tranny or someything, but I'm open to ideas.
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post #10 of 22 Old 04-28-2012, 05:47 PM
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You have to recalibrate the psom when you change tire size or gearing. A chip will not recalibrate but it can change shifting points. It can be done at a dealer or do a search for speedometer recalibration. I thought I had it bookmarked but don't and have to wade through a lot threads to find the right one.

Edit: found this http://www.thedieselstop.com/forums/...on-how-155177/

Jack
97 F250 Xlt, built E4od, D60 swap, Baby swamps, tunes by Dp
1.0 housing w/ wwII, 203* t-stat, diy 6637, 4" exhaust
Diy intercooled, 6.0 fan, Diy 140v Idm, Isspro Ev gauges
On board air, E-fuel, 6" lift on 35's
322000 miles

Last edited by 1Dieselman; 04-28-2012 at 05:59 PM.
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