Question about 4sd np-435 in f100
#1
Question about 4sd np-435 in f100
Hi all im quite sure i have the np435 4spd tranny in my 76 f100 4x4. First question is what are the recomended shift speed and at what rpms? Also i finally was able to go put around in it for the first time and 3rd gear( counting 1 2 3 4) not L123. Growls ag least thats what it sounds like . I dont hear or feal any clanking or clatering it just growls a little any ideas on that? And lastly if its is something how deathly bad is it? ( cuz its 100 miles to my shop) and can a novice repair it in driveway? Thank u all very much
#2
Shift speeds depends on gear ratio and load for starters I'd say 10 to 15 25 to 30 35 to 40 thats if your starting out in 1st or granny gear.If you are hearing a growling noise I would say you got a bad input or output bearing in your trans .The output can be changed with trans in truck but you have to have special tools to do so front one you have to pull trans.Usually the higher the gear your in the louder the bearings growl also when your down on the throttle the growl is louder
#3
#4
As long as it's just whining & not clunking/crunching, you should be OK........it's probably been like that for at least a good few thousand miles.
There are the input & output bearings that get noisy; & also the countershaft bearings, & needle rollers on the mainshaft.
It is full of oil, isn't it?
There are the input & output bearings that get noisy; & also the countershaft bearings, & needle rollers on the mainshaft.
It is full of oil, isn't it?
#5
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