high rpm's at 55mph

[wildbill23c]

Yes i have heard all about the A4LD problems. I bought this from my uncle who said the tranny was rebuilt about 10,000 miles ago and only driven only drive 2000 miles in the past eleven years according to the oil changes sticker on the window.


Again im sure its not stuck in 4wd

It just seems this bronco runs and shifts too good to have a major tranny issues. I was leaning toward a simple fix or at least hoping for a simple fix

Just because the transmission was rebuilt doesn't necessarily mean it was done right, or someone hasn't ran it hard and damaged it again.

My grandfather's 93 Ford Ranger 4x4 transmission was rebuilt when we brought it home from my cousins. It lasted about 14 months after that rebuild and the hardest use it had was towing a 2000lb trailer a couple times a year. That A4LD transmission is garbage there's no way around it.

Not to mention you said it sat basically for 11 years. That's extremely bad on not only the transmission but hard on the engine. Things wear out just by sitting as in seals, gaskets, etc. will dry out and crack. You are in for some repairs for sure.

 

[MiniMe]

So today I gotta chance to take the B2 for a longer test drive on a flat road. It is actually running 3200 rpms at 55mph which still seems a little high. I also discovered I have 4.10 limited slip differential.

 

[RonD]

Must have very small tires on there

4.10 is for pulling power so it is normal to have higher RPM at higher speed, but not that high

4.10 rear end
.75 Overdrive
27 inch tall tires
55 MPH
= 2,200 rpm

20 inch tall tires would be 2,900 rpm
OR
1.00 trans(3rd) would give you 2,900 rpm

 

[MiniMe]

Must have very small tires on there

4.10 is for pulling power so it is normal to have higher RPM at higher speed, but not that high

4.10 rear end
.75 Overdrive
27 inch tall tires
55 MPH
= 2,200 rpm

20 inch tall tires would be 2,900 rpm
OR
1.00 trans(3rd) would give you 2,900 rpm

Stock tire size... I think this weekend im gonna drain and change tranny fluid and change shift solenoid and tranny filter

Gotta ask a dumb question .. is this tranny a 4 speed with a 5th gear as OD or is this a 3 speed with 4th gear as OD?

Also how many speed sensors are there and where are they located?

 

[SenorNoob]

I'm still gonna say tach/wiring. Cause with a V6 if the second ground comes loose (Don't ask how IDK but it happened to me.) That's EXACTLY the way the reading would be.

One question:
Does it SOUND like it's revving that high?

I'm fairly sure it's a 3 spd with overdrive. That later ones (Mid 90's) (5r55e) were 4 spd with overdrive. And very different electrical parts.
Also the only speed sensor I know of is in the transfer case. It has the speedometer cable coming out of it.

 

[PetesPonies]

It's a Pinto 3 speed transmission that they installed an OD in it. So it's a 4 speed OD transmission. Stock tire height is about 26.5 inches.

26.5 x 3200 = 84800

4.10 x 336 = 1377.6

84800 / 1377.6 = 61.5 mph

If your info is correct, your tires must be shorter than a 195/75-15

 

[RonD]

Look here to see exactly what you have:
http://www.therangerstation.com/tech_library/AutoTrans.html

1985-1994 Ranger & Bronco II came with A4LD trans which is a 3 speed with overdrive added, so 4 speeds total

"The transmission codes can be located on the safety compliance certification label on the drivers door post."
Yours should be a "T"

 

[PetesPonies]

Nothing to do with the poster vehicle, but most 85s had the C5.

 

[kimcrwbr1]

You can tell by the shape of the oil pan on the tranny more than likely the A4LD. With the 410 carrier and stock tires and not shifting into overdrive maybe the tach is correct. Also the speedometer is probably wrong. Confirm the tach is correct? Confirm the speedometer is correct? Confirm it is shifting into overdrive? Confirm the type of tranny? Pull the connections for the tranny apart and clean with electrical cleaner and use dielectric grease to put them back together. You may need to change the speedometer gear in the tranny to get the speedometer correct.

 

[MiniMe]

I'm still gonna say tach/wiring. Cause with a V6 if the second ground comes loose (Don't ask how IDK but it happened to me.) That's EXACTLY the way the reading would be.

One question:
Does it SOUND like it's revving that high?

I'm fairly sure it's a 3 spd with overdrive. That later ones (Mid 90's) (5r55e) were 4 spd with overdrive. And very different electrical parts.
Also the only speed sensor I know of is in the transfer case. It has the speedometer cable coming out of it.

It is hard to for me to tell if the engine is really running that high.. I would say yes it does sound like its really running that high rpm but cant say 100% for certain but i will definitely check into it

Like i said b4 it shift into all 4 gears... could the tranny filter cause high rpms
This b2 runs and shifts so good

 

[PetesPonies]

The mph I gave is without overdrive.

 

[PetesPonies]

I feel like we are all spinning our wheels here, wasting energy. The reason is because the OP doesn't know whether his information he is giving to us is even accurate. I've give the possible scenarios and I have given the math. We could talk until the cows come home and it means nothing without factual info.

 

[wildbill23c]

It is hard to for me to tell if the engine is really running that high.. I would say yes it does sound like its really running that high rpm but cant say 100% for certain but i will definitely check into it

Like i said b4 it shift into all 4 gears... could the tranny filter cause high rpms
This b2 runs and shifts so good

Did you ever think that maybe your fan clutch is just stuck in the engaged position if it does that you will think your truck is running at a higher RPM than it really is. Check your fan clutch.

If it does in fact shift through all 4 gears, unless you are running tires like 195/75-15's or smaller you shouldn't be in the 3grand area on the Tach. If you are it isn't shifting right or not shifting at all, 4.10 gears should be giving you all sorts of power but not be putting you into the 3-4k area on a tach unless your tries are extremely small.

 

[MiniMe]

I feel like we are all spinning our wheels here, wasting energy. The reason is because the OP doesn't know whether his information he is giving to us is even accurate. I've give the possible scenarios and I have given the math. We could talk until the cows come home and it means nothing without factual info.

Wow so harsh... what isn't accurate?. I'm running stock tires 205/75/15.. I'm running at 3200 rpms at 55mph and my tranny is shifting into 4 gears. I am not stuck in 4hi or lo . It runs and shifts like a dream

 

[wildbill23c]

Fan Clutch?