Just rebuilt 302, and is in a jeep with 4.10 gears.,np435 transmission w/ warn overdrive (also 35in. tires., which I have run on most of the jeeps I have built with no problem). It has a FOMOC 2BBL carb., 289 heads, points ignition. The timing is set at 6 degrees BTDC. Going up small hills (at minimum) there is no power, no matter how much gas I give it and in 3rd gear. The engine has 71 miles on it.
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When synchros go bad they will NOT cause a vibration. They will make a kerchunk noise when you try to shift to that gear. I know. I rebuilt my transmission (Type: W59) because of bad synchros in 2nd gear.
I would look for bad U-Joints, or a bad carrier bearing. This could also happen if you went to a tire size larger than 31x10.5. The 2.7L 3RZ doesn't produce enough HP to run 33's. It will bog down on a hill in 3rd. You could also have some bad half-shafts up front. If you keep the hubs locked they may be dragging you down.
I hav a 95 Ford Mustang gt with an AODE rebuilt tranny, all internals have been upgrated. I have gears with the exception of overdrive, what could possibly caused this other than a loose overdrive band?
Usually the transmission needs to be rebuilt in that situation. It's a very common problem if that's the famous automatic overdrive transmsission. AOD I have had three trucks that have done that. It usually starts by shuttering when it shifts and than finally goes out. Sometimes the Lucas transmission treatment gives you a little more time, but it sounds too late for yours. From what I understand (mechanic told me) that when the overdrive goes out, it takes third gear with it. If you drive in hilly areas, that overdrive is shifting in and out all the time as you go up and down hills and wears it out. My Dad had that hapen on his F150 and he replaced his transmission with a junk yard transmission that turned out to have the same problem. I had that transmission replaced with a Jasper rebuilt and it worked great. I think it was $1300 for the rebuilt trans with the old one core trade in. I think when 3rd gear goes out, you can only go about 45mph without over reving the engine. I saw that same problem with a Ford Crown vic with that same transmission and 302 engine that my neighbor had. Did your third gear just go out all of a sudden or were you getting like a shuttering or kind of a grinding sound when it shifted?
They had a lot of problems with the pressure sensors. I would replace the whole tail shaft because they had problems with them. You don't have to remove the trans to remove the shaft. Get one from the junk yard. Hope this helps leave comment.
Need number off trans Is it a top load shifter goes right into trans or side linkage. If it is a side linkage 3 speed with overdrive (4 speed) it is a A833/Overdrive 4 (no granny gear just normal 1st gear) Otherwise it's a top load NP435 or NP445 the last two are HD units Your truck is 2wd with a 225 (3.7L) slant six and your the 7th owner
well, without hearing the noise myself, i could guess that the torque converter clutch might be going bad. the torque converter is the part that transfers the power from the engine to the transmission via viscous fluid motion, the converter also has a clutch that internally provides a direct connection inside the converter for better fuel economy. but as with anything labeled as a clutch, it wears down to a point where is slips. the noise your hear could be the torque converter clutch slipping. i owned a 90 astro van with the same drivetrain that made a noise similar to what you speak of up hills. while driving up hills, fully depress the accelerator and if the clunking noise occurs, then the whine goes away as you accelerate faster in a lower gear, very likely this is the case. you would have to have a transmission shop diagnose further. i drove that old van for five more years cause i didn't want to pay to have transmission repaired. it can be very expensive.