Manual Tranny/Np435 Question

[rockjeep44]

I got my Np435 all buttoned up and shifting nicely and all that jazz but here is my question. When the adapter is only bolted losely on I can shift through all the gears and turn the output shaft by hand and feel the reduction of each gear as it spins. However, once I snug down the bolts on the adapter I can still shift freely through the gears but cannot turn the output by hand no matter how hard I try. Is this normal? Does the adapter just snug everything down so tight that it can't be turned by hand anymore? I don't want to put it in the buggy and have it go boom first ride out. Thanks
-Andrew

[scotty]

nope,sounds like somethin is not right :(

you should still able to spin it by hand. never been inside a 435,but id say youve got a bearing not quite in the right spot,or maybe some preload shims out of whack somewhere...

[Will Morris]

Hey Andrew, I remember when Nick and I were messing around with it, the bolts you had in there were too long and causing interference, that's why we cut that one so you could shift into reverse. I'd check to make sure you don't have any interference in there with some of the other bolts.

Will

[Elliott]

I posted on this awhile back 'cause when I took mine apart it had a gasket... which the Ford dealer don't stock (at least as a single unit) and it appeared to me that it would likely alter endplay.

[scotty]

Originally posted by Elliott:
I posted on this awhile back 'cause when I took mine apart it had a gasket... which the Ford dealer don't stock (at least as a single unit) and it appeared to me that it would likely alter endplay.ahhh haaaa. yes,ive encountered a similar prollem when rebuilding d20s.whenever i use silicone on the front shift tower instead of a gasket,i always have to remove some preload shims from the rear to compensate.if i dont,the front output will not spin.

definaetly starting to sound like you got too much preload somewhere...

[rockjeep44]

Hmm, that could be the problem. When I take the adapter off, it looks like the output shaft bearing is sticking out like 1/16in. It's not completely flush with the case. So, when I silicone it and crank the bolts down on the adapter it's just putting too much pressure on the bearing. It that what you guys are telling me?

Will, I got the bolt problem solved. I shaved them down and nothing is interferring anymore so that can't be the problem.
-Andrew

[Elliott]

That's right, but to tell you the truth... that gasket wasn't very thick. I don't know if they would be available in a full tranny kit, or if that is the problem for sure.... but it did look like it could be.

[JeepsAndGuns]

That gasket would be real easy to make, just buy a sheet of gasket materal from your local parts store that matches as close as possiable the type that was on it before, then use the tcase adapter as a template. Try that and see it it helps.

[rockjeep44]

I put a ****-ton of silicone on there, I see no way a gasket could make a big enough difference to relieve the pressure and get this thing to turn freely. I mean that adapter has to be snugged down tight and gasket material is gonna squash too. Something just ain't right and I'm hot about it.

[Elliott]

That gasket should have given you at least .006" squished and I don't think silicone would do even .002"

If you have some gasket material or maybe some feeler gauge stock you could put .006+ at the corners where the bolts are and see if it frees things up.
Again, I'm not much of a tranny guy but I have worked a lot of close tolerance assembly and it looked to me like it would stack up without a gasket of the correct thickness. I don't have any gasket material left on mine to measure with the calipers unfortunately. Then... maybe this isn't even an issue Andrew. Good luck!

[rockjeep44]

Hmm, well mabye you are right. I'll give that a shot before I start tearing things apart

[Elliott]

If it makes you feel any better, when I snugged mine down without the gasket it is now super stiff... just checked it. Still, I'm not sure everything is lined up inside as I haven't spent any time with it.

[rockjeep44]

Hell yea, that's awesome to hear actually. Thanks for taking the time to check that man. I'm definitely gonna try and track a gasket down for this thing and at the very least make my own.

[kyjman]

Andrew.....when I do my T-5 it acts almost the same way. After installing the tranny to the bell its really hard to turn the output shaft. However, I think that you may have a problem with the bearing retainer shims being too thick. That would cause too much pressure on the bearing and create the "hard to turn syndrom". I know that will happen on the T-5. Does the 435 have a bearing retainer sleeve, where the input shaft exits the front??? I dunno, but if it does that may be the problem.

Good Luck and DONT FORGET THE PICS....AND I'm moving to Nashville this summer, and my oldest Son lives 15 mintues from Tellico, so maybe we can drink a few beers together soon.

See ya
Alan

[orangecherokee]

Originally posted by kyjman:
Andrew.....when I do my T-5 it acts almost the same way. After installing the tranny to the bell its really hard to turn the output shaft. However, I think that you may have a problem with the bearing retainer shims being too thick. That would cause too much pressure on the bearing and create the "hard to turn syndrom". I know that will happen on the T-5. Does the 435 have a bearing retainer sleeve, where the input shaft exits the front??? I dunno, but if it does that may be the problem.

Good Luck and DONT FORGET THE PICS....AND I'm moving to Nashville this summer, and my oldest Son lives 15 mintues from Tellico, so maybe we can drink a few beers together soon.

See ya
Alanawwww, after all the words they're friends now. i think that's soooo cute.

[kyjman]

Yes but I'll never, never be friends with ewe.........lol

I'm just kidding orange, and orange you glad of that....I love you too.....bud....bring some beer and join us.

[Elliott]

One thing to keep in mind, if this is a clearance thing here, is that proper torque on the nuts will be important. Too much torque will suck up extra endplay, unless the gasket gives you a dead stop... but I would think the torque should be around 45ft/lbs?
I'm really not a tranny guy, but I did note that when I put a little extra into the wrench the shaft started to bind without a gasket.

[Elliott]

Any luck on that tranny?

[rockjeep44]

Haven't gotten home to try what we talked about yet. June 6th I'll officially be back home for good as in I'll be a college grad. Then ya'll can expect buggy updates at least once a week smile.gif Right now I'm trying to track down a gasket kit so I can order it and have it shipped to my shop. If anyone can find a part # or somewhere that carries it let me know.
-Andrew

[rockjeep44]

Ordered a gasket kit for a NP435 today from Novak, updates once I get a chance to slap it together

[Elliott]

Good luck with that.