Transmission 4R100
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Transmission 4R100
I have a 2002 F-250 with the 5.4L and the 4R100. I barely ever 'get on it' so to speak but for some odd reason today I had to do it twice to merge in with traffic. Both time I was going about 40 and I got on it and it downshifted to 2nd I think.. all I know is the tach jumped from a little under 2K to 4K and off I went.
My question is, when it shifted back to the next higher gear and I was still accelerating hard it didn't have a smooth shift. It shuddered twice.. Almost seemed like maybe the rear springs were wrapping a little and that very well might be it, but I wanted to see if anyone else experienced this before. I know that a 5.4L should not be able to overpower the 4R100.. I mean if the 7.3L cant, the 5.4 doesn't stand a chance.
TIA
My question is, when it shifted back to the next higher gear and I was still accelerating hard it didn't have a smooth shift. It shuddered twice.. Almost seemed like maybe the rear springs were wrapping a little and that very well might be it, but I wanted to see if anyone else experienced this before. I know that a 5.4L should not be able to overpower the 4R100.. I mean if the 7.3L cant, the 5.4 doesn't stand a chance.
TIA
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Do you know if you have limited slip in the rear diff? it could have been the clutchs grabing.was the road wet ?
or there could be a slight problem within the torque converter.
Could have also been a slight epc delay within the tranny for some unknown reason.
Unless it does it all the time I wouldn't worry about it.Was the truck totally warmed up yet?
Rich
or there could be a slight problem within the torque converter.
Could have also been a slight epc delay within the tranny for some unknown reason.
Unless it does it all the time I wouldn't worry about it.Was the truck totally warmed up yet?
Rich
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No, the road was bone dry *gotta love the ohio winters*. I do not have a LSD. The truck was totally warm as I had just driven it about 20 miles. It doesnt do anything strange ordinarily other than a delayed reverse shift and I think it shifts too smooth for a truck transmission. I have been thinking about a Banks Transcommand. I hope it isin't the Torque Converter!
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Sounds a little more like clutches/bands. Could be the T/C clutch. Instead of trying to electronically correct the slow shifts I would recommend the Sonnax/Tricumulator upgrade, but this won't help your T/C any. The electronic shift improvers put more stress on the pump. The 4R100 in your truck is not the same as the one that gets put into a 7.3 truck or a lightning. Those units have more clutches and more robust bands, and would be a serious upgrade for your truck.
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I have the same issue, posted questions about it twice. If I floor it to get on the highway, it kicks down to the passing gear, but when it comes off it I get a howl and what could be described as a hestitation or rev limiter feel. Also have noticable chatter when cruising at 45-50 and the transmission does not drop into the final gear smoothly. Truck has 45K on it, with a 5.4, non-work use.
Fords4Me -If my tranny dies, can I bolt in the diesel version of the 4R100?
Fords4Me -If my tranny dies, can I bolt in the diesel version of the 4R100?
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Originally Posted by Jspafford
No, the road was bone dry *gotta love the ohio winters*. I do not have a LSD. The truck was totally warm as I had just driven it about 20 miles. It doesnt do anything strange ordinarily other than a delayed reverse shift and I think it shifts too smooth for a truck transmission. I have been thinking about a Banks Transcommand. I hope it isin't the Torque Converter!
Have a good tranny shop you trust chk yours out.
Talk to them about what its doing,see if they have seen it before.
Again becareful with some shops who want to rip into it .
Just other $.02
Rich
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Originally Posted by Paddy Whacker
Fords4Me -If my tranny dies, can I bolt in the diesel version of the 4R100?
The unit you have now can be upgraded fairly easily. I wouldn't worry too much right now, so long as you know every single sloppy shift and every bit of slip is wear. Should it go there are a lot of options.
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From: Long Island USA
I know for sure my tranny has done this a few times, as well as being generally "slippy" or "jumpy" in the 1-2 or 2-3 shift. This happened over time, it was fine when new, and got slowly worse as time went on. I have 23K miles on it,but that's lots of stop-and-go and idling.
After cleaning the MAF and resetting the computer, it went totally away...
It doesn't sound like the original poster is having any real problems... that double bump might be the TC locking up AFTER the 2-3 shift.
When was the last time the tranny fluid was changed, and how many miles you got on the truck total?
I BELIEVE you can put a diesel 4R100 in place, but your tranny can also be upgraded with the diesel parts. These include extra clutches for certain things, roller thrust bearings instead of thrust washers (I think) in certain places, and a cast-iron vs. aluminum drum (whatever the clutches sit inside of) for a certain clutch pack. That cast-iron "drum" also comes with the PTO option on the V10. OK, too much info...
After cleaning the MAF and resetting the computer, it went totally away...
It doesn't sound like the original poster is having any real problems... that double bump might be the TC locking up AFTER the 2-3 shift.
When was the last time the tranny fluid was changed, and how many miles you got on the truck total?
I BELIEVE you can put a diesel 4R100 in place, but your tranny can also be upgraded with the diesel parts. These include extra clutches for certain things, roller thrust bearings instead of thrust washers (I think) in certain places, and a cast-iron vs. aluminum drum (whatever the clutches sit inside of) for a certain clutch pack. That cast-iron "drum" also comes with the PTO option on the V10. OK, too much info...
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Originally Posted by Paddy Whacker
a 5.4,
If my tranny dies, can I bolt in the diesel version of the 4R100?
If my tranny dies, can I bolt in the diesel version of the 4R100?
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From: Long Island USA
Originally Posted by Casey
No, you can't. The bellhousing is different between the 5.4L and the 7.3L. You can build the 5.4L trans to be the same or stronger than a 7.3L trans.
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