Tranny Shifts Too Early, NEED HELP! - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 01-15-2000, 09:45 AM
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Tranny Shifts Too Early, NEED HELP!

93 351 E40D
Still Having Problems with the RPM the Transmission shifts at. It shifts at 3500 RPM at full throttle in any gear, sometimes it will shift at 4000.
Nobody seems to know how to adjust RPM shift points on the E40D. Is it on the transmission? The engine?
ANY INFO YOU CAN PROVIDE WILL HELP. Unfortunantly I am getting pretty frustrated with the vehicle and the lack of info on it.

Curt

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post #2 of (permalink) Old 01-15-2000, 02:30 PM
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Re: Tranny Shifts Too Early, NEED HELP!

There is so much info on your truck, you wouldnt believe it. You just arent looking hard enough! If you want info there are two late model bronco mailing lists. One at Bronco.com and one at bigbroncos.com. About adjusting your shift points, the only way I know how to do it is to go with some type of aftermarket performance tuner. I know JET and Hypertech both make them as well as this site which has a good amount of info. www.autotransinc.com If you would like, I'll post to either of the mailing lists for you and will forward you ALL the answers I get. Just email me a detailed description of the problem! to: [email protected]

hope this helps!
Roland

post #3 of (permalink) Old 01-16-2000, 10:34 AM
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Re: Tranny Shifts Too Early, NEED HELP!

Neither Jet nor Hypertech make a module that changes the shift points. Auto Trans Inc. Makes a box for vehicles that have changed from a C-6 to an E4OD, but it is very expensive. There is gotta be an easier way to reprogram the computer or fool it. I have noticed that back pressure and high intake vacuum will increase the shift RPM. I have a K&N filtercharger and a Cherry Bomb muffler. When I changed back to the stock configuration for both, the shift points improved. It seemed like this was part of the problem, but still shifts too low. I would like it to shift at about 5000 RPM and downshift without having to 'mash' the accelerator.

Curt

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post #4 of (permalink) Old 01-17-2000, 12:40 AM
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Re: Tranny Shifts Too Early, NEED HELP!

i left a reply in the trucks area for you. scine it is a comuter regulated shift pattern the really only way is to reprogram the computer, at least that's how i view it

Off roading relieves stress unless u break someth'n!!!!
post #5 of (permalink) Old 02-01-2000, 09:23 PM
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Re: Tranny Shifts Too Early, NEED HELP!

Any new info yet? I also noticed that it seems to shift differently when it is cold out. It shifts at a lower RPM.

Curtis



post #6 of (permalink) Old 02-02-2000, 09:43 AM
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Re: Tranny Shifts Too Early, NEED HELP!

Roland is right. Your not looking very hard. I went to the Hypertech home page and in less than 1 min I found the Ford Power Module that does everything, including manage your shift points and firmness. Here is the URL http://www.hypertech-inc.com/ford.html

[img]/wwwthreads_images/icons/cool.gif[/img] MG48 - 88 Bronco
post #7 of (permalink) Old 02-03-2000, 05:28 PM
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Re: Tranny Shifts Too Early, NEED HELP!

You and Roland are both wrong! I spent about 2 minutes and found out that the Hypertech chip ONLY modifys the Air/Fuel ratio and Timing for this engine setup. If you don't believe me call yourself 901-382-8888. If you still don't think I am looking hard enough, you are mistaken. I have spent far more time than your one minute looking and researching the issue.

Thanks!
Curtis

IF ANYONE HAS ANY FACTUAL INFORMATION PLEASE HELP!


post #8 of (permalink) Old 02-03-2000, 11:27 PM
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Re: Tranny Shifts Too Early, NEED HELP!

You want factual information? Here it is: Jet Performance Products makes a module that plugs into your ECC and increases horsepower. It does this by leaning the fuel/air mixture, timing, and so fort, and because the E4OD transmission is electronically controlled, the ECC tells it when to shift. This is done by the ECC first telling the engine what to do, then it gets feedback from various sensors, i.e.; MAP sensor, throttle position sensor, etc., and then tells the E4OD when and how to shift. That was putting it in simple terms without layman terms.

So, the JET Performance Products Ford module (specific for your make, model, and year of vehicle) will in fact make a difference in your shifting pattern.

You ask how do I know? Because I have it on my 1991 Silver Anniversary Edition Bronco. It gave me more usable power, better shifting patterns, and faster response to the pedal. Although, I then put a K&N Filter in the box, BBK Shorty Headers, BBK 3 Y-pipe with high flow catalic converter, Series 40 FlowMaster muffler, and ran it all dual out the back. Other than that I have the engine stock, except for a CraneCam Coil and 8mm SuperStreet wires.

It all came out to an aggressive Bronco with plenty of get up and go. Doing about 110mph, the rev limiter cuts in by then.

But the Jet module did make the E4OD wake up. Oh, I also put the Jet Performance Trans-Pac in the E4OD. It definitely make the E4OD shift a little firmer.

So, now you have the facts! All but one: my gas mileage sucks!


post #9 of (permalink) Old 02-04-2000, 08:47 AM
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Re: Tranny Shifts Too Early, NEED HELP!

Hey Technoman, with one of those setups, do you have to run Premium gas with it? I have seen info on the superchip idea, they seem to use Premium 'cuz they jack with the timing. A 20 cents per gallon increase for Premium over Regular, times the relatively low MPG of Bronco's, times lots of miles = quite a bit of $. Not a problem if its an occasional use or built for purpose vehicle. Just wondered if you needed Premium.

T&T - It's possible you may have a marginal sensor somewhere. Is your Barometric Sensor (monitors intake vacuum, usually on fire wall) hooked up hose-wise? Good hose, no cracks? Intake port and hose not gunked up? Just a thought.

post #10 of (permalink) Old 02-04-2000, 02:57 PM
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Re: Tranny Shifts Too Early, NEED HELP!

I think UncleDon is on the right track with what I am looking for. I have discovered that my engine is passing a lot of oil vapor through the breather vent. I burn about 1 quart of oil per 1000 miles. I think that here lies the problem, or at least may assist in the problem. The vehicle also is hard to start when cold. These two problems are a result of worn rings which result in low compression and excessive oil by-pass.
All my sensors checked out O.K. The only information I could not find out was the Ohm readings the Throttle Position Sensor should have at idle and wide open throttle. This could also be the problem. If you know these readings, or where to look for these readings, please help (chilton's does not have this info).
Thanks for your help.
Curtis

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