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Hi all,
Thank you for reading; Own a '95 Bronco 5.0 with E40D.
Engine rebuilt, transmission rebuilt, new torque converter, new solenoid, etc.
New distributor, cbales, plugs, MAF, MAP, Airfilter, many sensors replaced, balancer (don't know the name thing in front of the crankshaft) had it times many times (or at least checked) codes read. (Nothing special)
My problem is double: It feels laze as anything; hardly will go up the hill. 30Mph+ is almost impossible and when going uphill, it reaches 220 in 5 mins and 250 5 mins later. Not shifting back. (yes 250 is hot and I had the oil replaced)
Did order a tranny radiator, but that may solve only the heat issue.
Hills here are steep, but nothing crazy: also on the plains it's sllloooooowwwww.
I'm at a loss and about to give up after two years of investing and investing:
Cold on the dyno:
209,9 HP, torque can't remember but checked and was a little more than new, compression 170... So Engine looks fine....
All I can do is guess since you didn't tell me any codes.
My guess is that the solenoids are not getting power. This will leave the trans in fourth gear all the time. Check the red wires at the trans connector for +12 volts.
When I shift manually it feels the same.
It shifts real smooth in all gears.
Here is my guess:
Originally Posted by Mark Kovalsky
All I can do is guess since you didn't tell me any codes.
My guess is that the solenoids are not getting power. This will leave the trans in fourth gear all the time. Check the red wires at the trans connector for +12 volts.
Mark i believe the trans without power doesn't leave the trans in high gear all the time but,rather when in the D position.im fairly sure,without power to the solenoids,when you shift manually into the 1 and 2 positions,you'll have (or should have,rather) 2nd gear.
here are some other issues that can cause high gear starts.
here iv circled the d2 valve in red.
2-3 shift valve in blue.
3-4 shift valve in yellow.
inspect the springs and ensure the valves slide easily.transgo has nice reprogramming kits to help avoid issues like these.since your gunna be in there anyway.....
Mark i believe the trans without power doesn't leave the trans in high gear all the time but,rather when in the D position.im fairly sure,without power to the solenoids,when you shift manually into the 1 and 2 positions,you'll have (or should have,rather) 2nd gear.
Yes, you're correct. I was just commenting on when he was leaving it in D.
Hi guys, thank you for your replies and the scheme.
The solenoid has just been replaced (as the tq converter)
It shifts fine through all the gears.
The car is so slow that even on sand; pressing the accelerator full, doesnt make the wheels spin.
Someone commented that the lines maybe obstructed.
The mechanic wants to replace the whole computer, but that seems a bit harsh.
As soon as I find the solution, I will definitely put an extra tranny radiator on the car (bought the B&M one)
Will have the lining checked: if this is severely blocked, would that explain:
- lack of power (to the wheels)
- slowish
- overheating real quickly when needing torque
?
Kind regards, awesome forum here!!
Also rebuilding a '67 Bronco with a 351, but will not bother you with that here!
oh your talking about the engine overheating and not the trans?
if the trans is shifting through all the gears and your engine is overheating,then why do you suspect the trans,rather than the engine to be the issue?
edit.oh no,i got ya.your wondering if low line pressure is the cause for the trans to overheat and low power.that sure would explain things.
if line pressure was too low, wouldn't the trans slip badly with the pedal to the floor?
Mark's theory is pretty easy to test.
put the gear shifter is D and start taking off. then move the shifter to 2.
if it downshifts, it was starting off in a gear higher than 2 (probably 4) and confirms Mark's theory as a distinct possibility.
if it upshifts, then it must have been starting in 1st, and it's about anyone's guess.
the lack of power and overheating all make sense to my little brain if the trans is stuck in OD.
Also - don't put an "extra" cooler on it if it already has an auxiliary. only one Aux. cooler. and don't bypass the cooler in the trans. run the fluid to the radiator first, then to the auxiliary.
Hi all,
Engine temp is fine and runs like a charm.
The engine takes of in 1, shifts very smooth to 2, 3 and OD and back up (down?) when it's cool. When it's hot, it doesnt like shifting... at all...
Today on plain motorway, not been over 45/50Mph and it ran all the way up to 220, then with some hills (really nothing to mention and looking for some addresses) it went all the way to 250 again.
Garage wants to test another computer... I'm not sure it could be that...
Still thinking of blockage, although they say they blew air threw the hoses and seemed fine...
Thank you all for the insights... Not any further yet...
P.S. I DONT yet have the aux radiator; have bought one, but I would like to fix the problem first and not hide it and get into bigger trouble...
Thank you and everyone for the replies. I musnt have made myself very clear. (Not my 1st language) but I think the overheating is the result of a different problem. My bronco is slow as hell. It feels as if it's starting in 2nd or 3rd but it shifts fine.
Bronco's have never been fast, but the torque will make you smile, you can do doughnuts, in the turns the (inner)wheel will spin, at the traffic light the noise is amazing and the nose will definately go up... none of it.
It doesnt move. On the plane, driving slowly, it feels fine. When I'm looking for the power to go uphill (not racing, nothing fast) it overheats in 5-10 mins.
It shifts nice, but just..... nothing. Like it's missing about 60 horsepower...
WHEN it's hot it absolutely goes for the worse, but I at least understand why shifting gets bad when it's touching 250, 260F
Engine runs like a charm, completely rebuild. Transmission has been overhauled, new tq converter, solenoid... will check for congestion/obstrucions in cooling system, but I feel that's the result of another problem.
Anyone? I'm at the point of saying bye bye, but I love the car and really want to see it in its full glory again...
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