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jasonsdakota
Dodge Dakota
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7/25/2004
22:39:38
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 Subject: soft shifts??
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i need some rpm power from my truck and yes, i am soon upgrading the cam. but im pretty sure the computer is killing me. the computer retards the timing for the shift, right? how do we
#1. get those high rpm power back 4500+
#2. firm those shifts at the same time.
replies may leave new manifolds and shift kits out, please address computer if this is possible
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Lurkin
Dodge Dakota
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7/26/2004
10:36:52
| RE: soft shifts??
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Year/motor/tranny ???
If it's a pre2003 4.7/45RFE, then for #2 a bit of snipping on the TMR wire between the PCM and TCM may be in order.
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jasonsdakota
Dodge Dakota
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7/26/2004
21:25:31
| RE: soft shifts??
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2000 4.7 4x4 awd club cab auto. how much of the high rpm power loss is due to torque management. probably not much. i guess it's intake restriction. am i right?
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Lurkin
Dodge Dakota
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7/27/2004
10:36:49
| RE: soft shifts??
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TMR will just back the timing off during shifts. It's a quick and easy mod. Worth it in my book, it's not a big change, but noticable. Although I didn't notice as much of a change on my AWD as the 2wd people claim to have seen.
The stock 4.7 power curve drops off fast after around 5K. The HO manifold will help that from what I understand.
If you haven't done it yet, the HO cams and intake should help you do what you are looking for.
I have an 02 QC AWD 4.7/auto. I did the HO cams, but not the intake, as I want the power down low, where I spend most of my time.
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KingKota01
Dodge Dakota
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7/29/2004
04:30:59
| RE: soft shifts??
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Hey Lurkin...
"If it's a pre2003 4.7/45RFE, then for #2 a bit of snipping on the TMR wire between the PCM and TCM may be in order."
Can you expand on this procedure somewhat? My shifts are a little weak also.
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Lurkin
Dodge Dakota
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7/29/2004
09:52:08
| RE: soft shifts??
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A search on TMR will give you some feedback from others. On my 02, pin 10 on the PCM is the TMR signal wire. Clipping, removing the pin, or putting a switch in-line on, this wire will stop the PCM from retarding the timing during up-shifts.
I clipped mine, as I figured I could in-line a switch if necessary. But after running it awhile I never felt the need to put a switch in.
As I said above, on my QC AWD, the difference was noticable, but not significantly noticable. If I recall correctly, some of the 2wd people were getting some tire chirps on the upshifts that they weren't getting before. Also, when not doing full throttle runs, the shifts don't seem noticably harder on mine, hence no switch.
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Buck Harley
GenI
7/29/2004
11:54:19
|  RE: soft shifts??
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Sniping the TQ Mang. wire or putting on a single throw Toggel switch will stiffen up your shifts and give you a better ET I picked up a .50 second in the 1/4 Only works on the New Hemi and the 4.7 with the 45RFE Tranny
Buck
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KingKota01
Dodge Dakota
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7/29/2004
13:01:52
| RE: soft shifts??
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I've gotten different opinions from different people, but I have to ask again...does the harder shift harm or help the tranny, given that I don't stand on the throttle real often.
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matt
Dodge Dakota
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7/29/2004
23:46:06
| RE: soft shifts??
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the firmer the shift the longer the life of the clutch packs and fluid. its all in the time it takes to engage, if you think about it.... the slower it goes, the longer it takes, the smoother the engagement, but, the longer your clutch packs are slipping against each other, the hotter they ( and the fluid) is getting, the faster they burn up. the faster it goes, the opposite transaction occurs. the faster they grip, the less the slip, the lower the temp stays, the longer before a costly rebuild...
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00 RT/BC
Dodge Dakota
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7/30/2004
00:53:19
| RE: soft shifts??
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While soft shifts are likely to wear out some components, hard shifts are likely to stress drive train components to a greater extent. There are always pros and cons, but if you ask me I would go for the harder shifts because performance wins over driveability.
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jasonsdakota
Dodge Dakota
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7/30/2004
21:46:15
| RE: soft shifts??
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i know a tranny guy (25-30yrs) and yes a shift kit will actually help the tranny life.
however, adding torque while shifting will not.
shift kit may help tranny life. our cutting the wire will not. tmr is to help our tranny and prevent warranty claims. however, i would love to have a switch and will do after my cam installation. i just would only use it every once in a while. i've heard shift kits can be harder on u-joints however. thanks for the forum tip on the tmr, but did it seem to help from 5000-5400 or does it kick in right before a shift, like at 5350 or 5399 :) when does that thing kick in?
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